SY/T 0516-1997 Technical regulations for the design of insulating flanges
Some standard content:
ICS23.040.60
Registration number: 4801997
Petroleum and natural gas industry standard of the People's Republic of ChinaSY/T05161997
Technical code for insulating flange design1997·07-17Released
China National Petroleum Corporation
1998-01-01Implementation
SY/T 0516—1997
References
3 Definitions
4 General requirements for insulating flanges
5 Connection of insulating flanges
5 Design and manufacture of flange short pipes
Design and manufacture of insulating parts for joints and sealing parts
Assembly and inspection of insulating flanges
Appendix A [Standard requirements for flange strength of type II insulating flanges] Example of flange strength calculation for type 1 insulating flange SY/T0516—1997||tt ||In accordance with the arrangement of the 1995 China National Natural Gas Corporation's special project for the formulation of petroleum and natural gas industry standards, the Sichuan Petroleum Management Institute of High-tech Inspection and Design was responsible for the formulation of SYJ1G-85 "Technical Regulations for the Implementation of Natural Gas Equipment". In addition to retaining the effective parts of the original standard, the main changes are as follows: (1) Added an example of calculating the swing strength of the door-type insulation flange; (2) For the ear-type insulation, the small range is changed from no more than 10MPa to no more than 16MPa. This standard will take effect from the date of the death, and SYJ16:-85 will be replaced at the same time. The A of this standard is the standard summary.
The Appendix R of this standard is the indicative appendix.
This standard is proposed and managed by China National Natural Gas Corporation Planning and Design Institute. The drafting team is Sichuan Petroleum Administration Bureau Design Institute. The drafting team is Su Jianhua, Yan Mingxiong, Kou Ming. This standard is entrusted to Sichuan Petroleum Administration Bureau Design Institute for interpretation. V
1 Standard of the People's Republic of China Petroleum and Natural Gas Industry Standard Insulating Flange Design Technical Regulations
Technical code for tnsnlating fiange designSY/T 05161997
Replacement SYI165
No standard specifies the design, manufacture, assembly and inspection requirements of the flanges for oil and gas pipelines.
The core standard is applicable to flanges for oil and gas pipelines with a pressure not exceeding 16MPa and a delivery temperature not exceeding 2:01C. In principle, it is applicable to flanges for water-transmitting steel pipelines. 2 Reference standards
The following standards contain the following references, which become standard specifications through use in this standard. This standard is valid for the current version. All references will be revised. The parties using this standard should consider the latest version of the following standards. GHT97.21985 Type A Class
CB150-1989 Steel Containers
GB/T 196 :1981
GB/T 539—1995
GR/T 911—1988
G3/ T 1047—1995
Ordinary screw size (diameter) (600in) oleophobic rubber strands
Equal length double-headed screw raw grade
First component of the public ticket diameter
GB/T1!431990
GB/T 132—1980
GB7T 1iR4—1980
GB/T 1800—1979
GB/T 18041992
G 3452.11992
Nominal pressure of piping components
Shape and position tolerance codes and their social rules
Shape and position tolerances Provisions for tolerances without indications General standard deviations General tolerances for linear dimensions
Liquid and gas for use 0-shaped seals Dimension series and tolerances GB/T3452.38
GB/T 3985—1995
Hydraulic and pneumatic pressure gauges Dimensions and design specifications for grooves and grooves GR/T 5129.3985
G13, T 5129.4985
GB/T $:29.5[985
GR/T51331985
GB/T 6170—1986
Formaldehyde-free laminated glass board
Non-oxidized laminated glass cloth board
Laminating sample
H890--75340 Hydrogenated phenolic laminated glass cloth sample JB1679-753026 High strength phenolic laminated glass cloth sample 3640 Hydrogenated phenolic laminated glass cloth tube
JB 163075
JB29488!
4330 Acid glass gauge pressure plastic
J4726-92
Yuli container feather carbon steel and low alloy steel parts buried steel pipe reverse polarity protection parameter test Fangda China Shitao Natural Gas Corporation Approved on July 17, 1997 and implemented on January 1, 1998
1 Definition
The following definitions are adopted in the standard
3.1 Insulating flangeSY/T05161997
It is a general term for pipe reverse flange joints which have the sealing performance required by buried homogeneous pipe and the electrical insulation performance required by electrical corrosion protection engineering. It includes the flange, the insulating sealing parts between the two flanges, the flange parts and the insulating parts: and a pair of steel short pipes that have been welded to the two flanges respectively. The insulating flange is divided into two types according to the structure of its insulating sealing piece: specific-pressure-saled insulating flange (abbreviated as "type insulating flange") and specific-pressure-tight insulating flange (abbreviated as "type II insulating flange"). u-lalinglange)
size relies on pre-tightening a single tight-fitting part with good rebound performance and required electrical insulation to the expected tightness comparison pressure, to simultaneously realize the original flange connection sealing and electrical insulation of the insulating flange, 3.3 tight-fitting insulation flange type insulation forget]sclftightcnicgclicsuling[lan（tpinslat:ngflange)
foot-shaped rubber tooth seal looks at the dynamic trend of the body composed of a tight time assembly containing parts, in the flange consultation cover has the company when Jie self 3.4 Insulating sealing parts insulamgscalingphrts are a general term for single insulating and sealing parts that can simultaneously meet the requirements of electrical insulation and sealing of flange connections, as well as insulation and sealing assemblies composed of 0-shaped seals and insulators. 3.5 Fasteners and other parts insulat:ngpartsforfasizncrs are used between flanges and flange hardware (double-ended analysis and nut) to achieve a high degree of tightness and sealing between the flanges. 4.1 The insulating flange shall have the required insulation performance for the anti-corrosion protection project of the pipe. 4.2 The insulating flange shall be able to work for a long time under the temperature and pressure required by the pipe shaft, and have sufficient strength and tightness. 4.3 The structure of the insulating flange shall make it convenient to disassemble and replace the detachable parts of the flange in the assembly and installation state. 4.4 The spare parts of the insulating flange shall have a simple structure, convenient processing, easy raw materials and low cost. 4.5 The replacement of the missing flange parts shall generally be less than one year. 4.G Except for special circumstances, the nominal diameter of the insulating flange shall comply with the provisions of GR/1047, and the nominal diameter shall comply with the provisions of GR/1048. The insulating flanges of the pipelines conveying water with high pressure and the pipelines conveying medium containing conductive materials shall be electrically insulated on the inner surface of the flanges.
4. The insulating flanges shall only be used in the occasions where the nominal pressure PN is less than or equal to 2,SMPa. Insulating flanges shall not be set in the places that are not subjected to human testing or are used for external loads. 4.10 This standard is a general requirement for insulating flanges. When there are special requirements on the design drawings of insulating flanges, they shall also meet the design requirements.
5 Structure of shrink flanges
3.1 The structures of type I and type II insulating flanges are shown in Figure 1 and Figure 2 respectively. 2
Bar code parts
Figure [Type I insulating flange
$Y/ T 0516-1997
Matching surface parts
Electrically thief-free parts
Pool clearance good proof joint rod
Figure 2 Flange
5.21 Type I and type II insulating flanges should use butt welding flanges with tapered necks: Only when the nominal diameter of the flange is less than or equal to 400m1, the flange of type II insulating flange can use flat welding flanges. 5.3 Under the premise of ensuring the usability requirements of the insulating flange, the designer may also use other structural types of insulating flanges other than the type I and type II insulating flanges specified in this standard. 6 Design and manufacture of flanges and short pipes
6.1 Flange strength calculation
6.1.1 Flange strength calculation of type I tension flange can be carried out according to the calculation method specified in GB150 for hard-faced flanges. 6.1.2 Flange strength calculation of type II tension flange can be carried out according to the calculation method specified in Appendix A (Standard Appendix). 6.2 Material and general quality of flange
6.2.1 The material of flange can meet the requirements of flange working conditions and machining, and have good weldability with the selected short pipe material. 6.2.2 Flanges should also be manufactured and accepted in accordance with the provisions of JB4736: When the nominal pressure PN is small When the nominal pressure is greater than or equal to 6.4MPa, the forging shall meet the requirements of Class I; when the nominal pressure PW is greater than +6.4MPa, the forging shall meet the requirements of Class I. 6.3 Machining of flanges
6.31 The sealing surfaces of the flanges shall all be smooth. 6.3.31 The surface roughness R. of the flange sealing surface of the type explosion-proof flange after machining shall not be less than 6.3: The surface roughness R. of the type II continuous flange sealing surface after machining shall not be less than +1.6. When the flange is forged by die forging, the small tolerances of the forging dimensions and the length tolerances of each part shall comply with the provisions of this standard, and the cover, pocket hole and other parts shall be inspected. The inner surface and the other surfaces of the small end of the flange with chain collar can be machined without machining.
.33 The limit deviation of the size of each part of the flange, except the limit deviation of the flange bolt hole size shall be in accordance with the H1 specified in G/T18, and the limit deviation of other sizes shall be in accordance with the provisions of GB/T104. 6.34 The position tolerance of the axis of each bolt hole of the flange shall be in accordance with the provisions of GE/1182, and the three reference parts system corresponding to the flange sealing surface and the original surface of the flange shall be given. The tolerance value is calculated according to formula (1). The calculated value shall also be rounded to the standard value of the number system according to the table [p= K(min-dmx) SY/ T 0516-1997 or: m/s; ... :0°
6.3.5 Except for the screw hole positioning tolerance, the shape and position tolerance of the flange parts may not be shown in the drawing. This should be in accordance with the current regulations of B/T1!4C. 6.4 Pipe
6.4.1 The material of the short pipe should be the same or similar to the pipe material of the ground pipe that connects the flange. The short pipe and the other flanges should have good corrosion resistance. 6.4.2 The pipe type of the standard pipe shall be different from the requirements of the mother pipe. The pipe must be consistent with the requirements of the quality standards and meet the specific requirements of the factory. 5
6.4.3 The length of the entire pipe can be taken as the outer wall of the pipe, but it should not be less than 300mm. 1.4 The thickness of the short pipe specification should be calculated based on the actual wall thickness of the pipe when calculating the required length of the pipe for pipes with flanges. When calculating the actual wall thickness of the short pipe based on the actual pressure of the small pipe specification, the actual wall thickness of the pipe should be taken as the known wall thickness of the pipe. When the flange material of the flange is the same as that of the flange and the mechanical properties are similar, the short pipe should be selected with suitable material and wall thickness to meet the welding requirements between the two ends of the short pipe and the flange and the flange of the channel. At this time, the wall thickness of the plate can be greater than the wall thickness calculated by strength calculation.
6.4.5 When the nominal diameter of the short pipe is greater than or equal to 350mm, the short pipe can also be made of the same material as the channel or other similar plates. The difference is small: the chain plate should meet the welding requirements of fluid conveying pipes or pressure vessels 6.4 The longitudinal weld of the short pipe should be double-sided. 6.4.7 The longitudinal rate of the pipe should be tested by non-destructive testing. The non-destructive testing method, the inspection rate and the weight level, as well as the welding speed requirements should be determined by the flange of the joint and the corresponding design speed of the pipe surface, and should not be lower than the average requirements of the same position of the cabinet. And mark the insulation method on the design drawing. 6.4.8 The type of the wall opening of the insulating flange should be marked on the insulating flange design drawing. The insulating flange manufacturing process should be as follows:
| ... The material of the insulating parts shall have a certain mechanical strength to ensure that these parts are not easily damaged during installation and use. 7.1.3 The resistance between the insulating seal and the fastening parts on the insulating working surface shall be above 500. 2 Single insulating parts (used for insulating seals of [type flanges] 7.2.1 Single insulating parts shall have a certain strength and good resilience to meet the requirements of the insulation flange under working conditions. 0516—1997
7.2.2 The electrical insulation of the single-insulation seal design should be able to meet the electrical insulation requirements of the wire flange, and should not exceed the specified point! Natural performance indicators,
7.2.3 The structure of the single-insulation seal is shown in 3,-uniform
area
single running equal village learning component outer diameter [same flange outer diameter], min; 5-inner diameter of the natural seal component [than the flange inner diameter]-3mm)mm center-center diameter of the capital, the center diameter of the flange hole, the same diameter as the die-like hole 2.4 The materials listed in Table 2 can be used to make single-load sealing parts. The core of the sealing parts is replaced by the rubber plate during the period of replacement. 7.3 The sealing assembly [for continuous sealing of type II flanges] is compared with GR/T 3OSS
7.3.1 The insulation assembly consists of a hard insulation body and a ten-layer insulation body. The structure is shown in the figure
.3.2 The electrical insulation performance and anti-penetration ability of the insulation body material can meet the requirements of the insulation flange under the working condition. The electrical insulation performance of the insulation body material is not lower than the index of the material when it is produced.3.3 The tensile strength of the insulation material should be above 60P, and not less than the tensile strength of the material when it leaves the factory.34 The insulation material should have good performance.7.3.5 The thickness and width of the insulation body should be based on the working conditions of the insulation industry and the strength of the insulation body material. - Generally 12mm 7.3.6 The arc part of the insulator is made as shown in Figure 5. The density of the arc part is 02B, but it should be within 41m SY/T 05161997
potential I product
is the pen end outer part "Si out outer diameter), mm, H wire end body (same as some inner diameter, m:
B one medical part diameter, mm;
electric through #
center plane diameter (same as the method of monitoring the light milk mountain center return self diameter::, d trend body pregnant my diameter, mn.
dangerous silt root control chaos effect month (same as Flange screw price introduction day): a must continue the body library, mm
6 a filter receiving four seals standard flat straight meal, m
Figure 4 insulation seal assembly
Figure inner diameter size
7.37 must be more dense at the surface of the two cases, its shape, size and size difference called GBT3452.3 provisions, the constant drag diameter will be reviewed and sealed class skill record as shown in the price shape 7.3.Except for the 8th grade sealed size, the other smaller sizes of insulators can be determined according to the current standards of GB/T184. 7.3.9 The diameter of the light lead hole of the insulator can be compared with the basic size of the core diameter of the tree 1.5~2m. 7.3.10 The position tolerance of each inspection hole of the insulator is controlled according to GB/T184 standard. The three-dimensional system of the insulation material is given by the three-dimensional system of the axis of the inner arc table of the end face of the insulation material. The calculated value is calculated by formula (2), and the calculated value is also rounded to the standard value of the system.
t,= K(d m- (dhu,)
SY/ T 0516—1997
: --- The measurement tolerance of each screw diameter of the insulator in front of the axis is mm; the clearance is effective, tolerance = 0.6;
The minimum limit size of the bolt hole of the insulator, II IIIim
The maximum limit size of the outer diameter of a bolt, mm7.3.11 Except for the position tolerance of the axis of each screw hole of the insulator, the other shape and position tolerance values can be unmarked in the drawing. The tolerance values of these items shall comply with the provisions of GB/T1184. 7.3.11 Insulators can be made of the materials listed in Table 3 or other materials with similar properties to these materials. Table 3 Insulator materials
Laojin pressed board
Huandong laminated glass board
3026 High annealing acid-treated laminated cloth area
Material standard
GD/T :: 29.3
GB/ T 512S.4
GD/T 5139.5
J31679
7.3.13 When the design pressure is 6.4MPa, epoxy laminated glass cloth board should be used to make the insulator: When the design pressure reaches 1.MPa, there is a requirement for airtightness test. Sometimes, the insulation body should be treated to increase its internal density first. 7.3.14 The internal density treatment of the insulator is carried out along the processed surface of the insulator that contacts the medium. A mixture of amine and epoxy resin in a certain proportion is applied to these surfaces, and then the mixture is pressurized with gas. After pressurizing for 10m at the design pressure, it can be removed and burned for 24h.
7.3.150 The sealing ring can be removed according to the different working media. Oil-resistant and oxygen-resistant ordinary glue can be used. The performance of the material should meet the requirements of the corresponding material standards. 7.3 .160 type rubber seal size can be in accordance with the provisions of GB3452.1.7.4 Insulation parts
7.4.1 The structure of screw-down insulation lining is shown in Figure 6 and Figure 7 respectively. il
Inner diameter of bolt insulation industry, mim:
The thickness of the light insulation village. mm;
L,-single-sex insulation, IT
Figure 6 End diameter of insulation sleeve
One-dimensional diameter of the insulation sleeve mm
One-dimensional outer diameter of the standard, mI:
-Thickness of the flange of the bolt: m
Figure 7 Screw insulation pad
Double 1 type insulation flange:
Type flange:
Where: [
SYAT 0516
L,- 3+t, -3
L,-r-1
Flange thickness (for flange sealing part height), mm: single insulator can seal the original seat of the parts, mT
7.4.2 The depth of the flange can form a 7.11 requirement between the insulator working surface where it is located, and the electrical insulation performance of the material is not similar to the factory index of the material. 7.4.3 The insulation strength of the material should be above 150MP. 7.4.4 The distance between the inner diameter of the threaded sleeve and the outer diameter of the threaded sleeve should be as small as possible, generally 0.5-1mm. When the lining is made of elastic material with good elasticity, it can also be made into a structure with interference fit with the outer diameter of the thread. The thickness of the screw insulation sleeve can generally be 1.5-3m. 7.4.5 The inner diameter of the screw insulation sleeve can be the same as the inner diameter of the insulating sleeve, but when the screw insulation sleeve and the outer diameter of the bolt must be matched, it should still be 0.5 larger than the outer diameter. 1 The outer diameter of the screw insulation pad should be 2~3m larger than the standard pad specified in GB/T997.2. 7.4.6 The materials listed in Table 4 or other materials with similar properties can be used to select insulation lining. Materials for the insulation sleeve in Table 4
All pressure
Glass
264C Oxygen-containing products
Deep packaging
4330 Glass fiber plastic
GFT 5133
JB29-8
The materials listed in Table 5 can be used to make frequency wheel continuous lack of flat circle with other materials with similar properties. Table 5 Control ring material
3G2: High tensile strength slate
Epoxy compression effect and mechanical
133G Process made Rui fiber raw material
Ja 1579
GD/I =129 5
JE 2344
7.4.8 The insulation flange and the insulation flange should be made of two parts respectively. When both parts are made of the same material as the insulation pad, the two parts can be combined into an integral structure as shown in Figure 8. The insulation sleeve is bolted and the bolt connection is completed. For the flange:
Type II insulation flange:
Fasteners
$Y/T 0516-1997
The effective length of the flange is m1
Figure 8 Explosion-proof energy barrier
1, = 2t+ - 3
I,--(-
8.1 The fixing of the flange includes bolts. 8.2 The bolts shall be double solid end columns of equal length specified in GBT90[8.3 The screw disc shall be hexagonal screw specified in B/T170. 8.4 The flat plate specified in GB/T07.2 shall be adopted, but when the nominal diameter of the bolt is less than M24, non-standard self-made thickened gaskets shall be adopted: except for the thickness of the non-standard thickened gaskets which is evenly thickened to m, the other dimensions shall be manufactured in accordance with the standard gaskets specified in GB/T2.
9 Assembly and inspection of flanges
9.1.1 The welding of flanges and short pipes shall be in accordance with the test results. , the welding seam inspection method, inspection, main and return seam maintenance requirements, etc., the groove should be similar to the welding requirements of the natural flange for the same part of the pipe, follow the same standards,
9.1.2 When it is required to treat the insulating flange with an insulating material coating, the inner surface of the insulating flange can be sealed after the welding is completed and passed the inspection, 91.3 Before assembling the insulating flange, the tightness of the parts should be corrected, and the tight parts and the seven insulating parts should be inspected one by one. Parts that have been sheared and deformed shall not be used,
9.1.4 When assembling the insulating flange, the cumulative bolts should be about the same as the insulation tightness when the required tightness is achieved. 9.1.5 Before installing the seal of the two parts of the insulation flange, the seal should be cleaned and put into a suitable place, and then the heart-shaped rubber seal should be placed in the place tightly: no misalignment is allowed. 9.1.6 When assembling the 1-type insulation flange, just make sure that the flange surface and the insulation body are completely in contact with each other, and then lightly pre-tighten.5
J31679
7.3.13 When the design pressure is 6.4MPa, epoxy laminated glass cloth board should be used to make the insulator: When the design pressure reaches 1.MPa, the insulation body should be treated to increase its internal density. 7.3.14 The internal density treatment of the insulator is carried out along the processed surface of the insulation body that contacts the medium. A mixture of amine and epoxy resin in a certain proportion is polished on these surfaces, and then the mixture is pressurized with gas. After pressurizing for 10m with the design pressure, the workpiece can be removed and burned for 24h.
7.3.150 The joint seal ring can be withdrawn. According to the different working media, oil-resistant and oxygen-resistant rubber should be used. The performance of the material should meet the requirements of the corresponding material standards. The size of the 7.3.160 type rubber seal can be in accordance with the provisions of GB3452.1. 7.4 Insulation parts wwW.bzxz.Net
7.4.1 The structure of the screw-down insulation lining dynamic bolt insulation pad is shown in Figure 6 and Figure 7 respectively. il
Pregnant bolt insulation industry inside the column, mim:
A light inspection of the insulation village education. mm;
L,-single-sex insulator, IT
Figure 6 end diameter insulation sleeve
a desired diameter mm
a standard outer diameter of the road ticket, mI:
-damage bolt flange thickness: m
Figure 7 screw insulation pad
double 1 type insulator flange:
type insulator flange:
where: [
SYAT 0516
L,- 3+t, -3
L,-r-1
Flange thickness (for flange sealing part height), mm: single insulator can seal the original seat of the parts, mT
7.4.2 The depth of the absolute value and the field selection of the final specification plate can form a 7.11 requirement between the insulator working surface where it is located, and the electrical insulation performance of its fence material is not similar to the factory index of the material 7.4.3 The insulation strength of the material should be above 150MP. 7.4.4 The distance between the inner diameter of the threaded sleeve and the outer diameter of the frequency selection should be as small as possible, generally 0.5-1mm, when the elastic material with good elasticity is used to make the lining hospital, it can also be made into a structure with interference fit with the outer diameter of the thread. The thickness of the screw insulation sleeve can generally be 1.5-3m. 7.4.5 The inner diameter of the screw insulation sleeve can be the same as the inner diameter of the insulating sleeve, but when the screw insulation sleeve and the outer diameter of the bolt must be matched, it should still be 0.5 larger than the outer diameter. 1 The outer diameter of the screw insulation pad should be 2~3m larger than the standard pad specified in GB/T997.2. 7.4.6 The materials listed in Table 4 or other materials with similar properties can be used to select insulation lining. Materials for the insulation sleeve in Table 4
All pressure
Glass
264C Oxygen-containing products
Deep packaging
4330 Glass fiber plastic
GFT 5133
JB29-8
The materials listed in Table 5 can be used to make frequency wheel continuous lack of flat circle with other materials with similar properties. Table 5 Control ring material
3G2: High tensile strength slate
Epoxy compression effect and mechanical
133G Process made Rui fiber raw material
Ja 1579
GD/I =129 5
JE 2344
7.4.8 The insulation flange and the insulation flange should be made of two parts respectively. When both parts are made of the same material as the insulation pad, the two parts can be combined into an integral structure as shown in Figure 8. The insulation sleeve is bolted and the bolt connection is completed. For the flange:
Type II insulation flange:
Fasteners
$Y/T 0516-1997
The effective length of the flange is m1
Figure 8 Explosion-proof energy barrier
1, = 2t+ - 3
I,--(-
8.1 The fixing of the flange includes bolts. 8.2 The bolts shall be double solid end columns of equal length specified in GBT90[8.3 The screw disc shall be hexagonal screw specified in B/T170. 8.4 The flat plate specified in GB/T07.2 shall be adopted, but when the nominal diameter of the bolt is less than M24, non-standard self-made thickened gaskets shall be adopted: except for the thickness of the non-standard thickened gaskets which is evenly thickened to m, the other dimensions shall be manufactured in accordance with the standard gaskets specified in GB/T2.
9 Assembly and inspection of flanges
9.1.1 The welding of flanges and short pipes shall be in accordance with the test results. , the welding seam inspection method, inspection, main and return seam maintenance requirements, etc., the groove should be similar to the welding requirements of the natural flange for the same part of the pipe, follow the same standards,
9.1.2 When it is required to treat the insulating flange with an insulating material coating, the inner surface of the insulating flange can be sealed after the welding is completed and passed the inspection, 91.3 Before assembling the insulating flange, the tightness of the parts should be corrected, and the tight parts and the seven insulating parts should be inspected one by one. Parts that have been sheared and deformed shall not be used,
9.1.4 When assembling the insulating flange, the cumulative bolts should be about the same as the insulation tightness when the required tightness is achieved. 9.1.5 Before installing the seal of the two parts of the insulation flange, the seal should be cleaned and put into a suitable place, and then the heart-shaped rubber seal should be placed in the place tightly: no misalignment is allowed. 9.1.6 When assembling the 1-type insulation flange, just make sure that the flange surface and the insulation body are completely in contact with each other, and then lightly pre-tighten.5
J31679
7.3.13 When the design pressure is 6.4MPa, epoxy laminated glass cloth board should be used to make the insulator: When the design pressure reaches 1.MPa, the insulation body should be treated to increase its internal density. 7.3.14 The internal density treatment of the insulator is carried out along the processed surface of the insulation body that contacts the medium. A mixture of amine and epoxy resin in a certain proportion is polished on these surfaces, and then the mixture is pressurized with gas. After pressurizing for 10m with the design pressure, the workpiece can be removed and burned for 24h.
7.3.150 The joint seal ring can be withdrawn. According to the different working media, oil-resistant and oxygen-resistant rubber should be used. The performance of the material should meet the requirements of the corresponding material standards. The size of the 7.3.160 type rubber seal can be in accordance with the provisions of GB3452.1. 7.4 Insulation parts
7.4.1 The structure of the screw-down insulation lining dynamic bolt insulation pad is shown in Figure 6 and Figure 7 respectively. il
Pregnant bolt insulation industry inside the column, mim:
A light inspection of the insulation village education. mm;
L,-single-sex insulator, IT
Figure 6 end diameter insulation sleeve
a desired diameter mm
a standard outer diameter of the road ticket, mI:
-damage bolt flange thickness: m
Figure 7 screw insulation pad
double 1 type insulator flange:
type insulator flange:
where: [
SYAT 0516
L,- 3+t, -3
L,-r-1
Flange thickness (for flange sealing part height), mm: single insulator can seal the original seat of the parts, mT
7.4.2 The depth of the absolute value and the field selection of the final specification plate can form a 7.11 requirement between the insulator working surface where it is located, and the electrical insulation performance of its fence material is not similar to the factory index of the material 7.4.3 The insulation strength of the material should be above 150MP. 7.4.4 The distance between the inner diameter of the threaded sleeve and the outer diameter of the frequency selection should be as small as possible, generally 0.5-1mm, when the elastic material with good elasticity is used to make the lining hospital, it can also be made into a structure with interference fit with the outer diameter of the thread. The thickness of the screw insulation sleeve can generally be 1.5-3m. 7.4.5 The inner diameter of the screw insulation sleeve can be the same as the inner diameter of the insulating sleeve, but when the screw insulation sleeve and the outer diameter of the bolt must be matched, it should still be 0.5 larger than the outer diameter. 1 The outer diameter of the screw insulation pad should be 2~3m larger than the standard pad specified in GB/T997.2. 7.4.6 The materials listed in Table 4 or other materials with similar properties can be used to select insulation lining. Materials for the insulation sleeve in Table 4
All pressure
Glass
264C Oxygen-containing products
Deep packaging
4330 Glass fiber plastic
GFT 5133
JB29-8
The materials listed in Table 5 can be used to make frequency wheel continuous lack of flat circle with other materials with similar properties. Table 5 Control ring material
3G2: High tensile strength slate
Epoxy compression effect and mechanical
133G Process made Rui fiber raw material
Ja 1579
GD/I =129 5
JE 2344
7.4.8 The insulation flange and the insulation flange should be made of two parts respectively. When both parts are made of the same material as the insulation pad, the two parts can be combined into an integral structure as shown in Figure 8. The insulation sleeve is bolted and the bolt connection is completed. For the flange:
Type II insulation flange:
Fasteners
$Y/T 0516-1997
The effective length of the flange is m1
Figure 8 Explosion-proof energy barrier
1, = 2t+ - 3
I,--(-
8.1 The fixing of the flange includes bolts. 8.2 The bolts shall be double solid end columns of equal length specified in GBT90[8.3 The screw disc shall be hexagonal screw specified in B/T170. 8.4 The flat plate specified in GB/T07.2 shall be adopted, but when the nominal diameter of the bolt is less than M24, non-standard self-made thickened gaskets shall be adopted: except for the thickness of the non-standard thickened gaskets which is evenly thickened to m, the other dimensions shall be manufactured in accordance with the standard gaskets specified in GB/T2.
9 Assembly and inspection of flanges
9.1.1 The welding of flanges and short pipes shall be in accordance with the test results. , the welding seam inspection method, inspection, main and return seam maintenance requirements, etc., the groove should be similar to the welding requirements of the natural flange for the same part of the pipe, follow the same standards,
9.1.2 When it is required to treat the insulating flange with an insulating material coating, the inner surface of the insulating flange can be sealed after the welding is completed and passed the inspection, 91.3 Before assembling the insulating flange, the tightness of the parts should be corrected, and the tight parts and the seven insulating parts should be inspected one by one. Parts that have been sheared and deformed shall not be used,
9.1.4 When assembling the insulating flange, the cumulative bolts should be about the same as the insulation tightness when the required tightness is achieved. 9.1.5 Before installing the seal of the two parts of the insulation flange, the seal should be cleaned and put into a suitable place, and then the heart-shaped rubber seal should be placed in the place tightly: no misalignment is allowed. 9.1.6 When assembling the 1-type insulation flange, just make sure that the flange surface and the insulation body are completely in contact with each other, and then lightly pre-tighten.6 The materials listed in Table 4 or other materials with similar properties to these materials can be used to make the selected lining. Table 4 Materials for the field training set
Pressure lifting
Risk glass
264C Oxygen some products pressure ring increase cloth
Deep package
4330 Glass fiber plastic
GFT 5133
JB29-8
The materials listed in Table 5 can be used to make frequency wheel continuous lack of flat circle with other materials with similar properties of these materials. Table 5 Materials for the control ring
3G2: High tensile strength slate
Epoxy pressure effect disease and machine
133G Fiber raw material
Ja 1579
GD/I =129 5
JE 2344
7.4.8 The insulation flange and the insulation flange should be made of two parts respectively. When both parts are made of the same material as the insulation pad, the two parts can be combined into an integral structure as shown in Figure 8. The insulation sleeve is bolted and the bolt connection is completed. For the flange:
Type II insulation flange:
Fasteners
$Y/T 0516-1997
The effective length of the flange is m1
Figure 8 Explosion-proof energy barrier
1, = 2t+ - 3
I,--(-
8.1 The fixing of the flange includes bolts. 8.2 The bolts shall be double solid end columns of equal length specified in GBT90[8.3 The screw plate shall be hexagonal screw specified in B/T170. 8.4 The flat plate specified in GB/T07.2 shall be used, but when the nominal diameter of the bolt is less than M24, non-standard self-made washers shall be used: non-standard Japanese In addition to the thickness of the thickened gasket being thickened to m, the other dimensions of the manufacturing should be in accordance with the standard gaskets specified in GB/T2. 9 Assembly and inspection of insulated flanges 9.1.1 The welding of flanges and short pipes should be carried out in accordance with the relevant requirements of the test meeting, the welding seam should be inspected in accordance with the inspection method, the main and return seam maintenance requirements, etc. The groove should be similar to the welding requirements of the pipes in the same position of the insulated flange, and the same requirements should be followed. 9.1.2 When the insulating flange is required to be treated with an inner coating of an insulating material, the inner surface of the insulating flange can be sealed after the welding is completed and the inspection is qualified. 91.3 Before the insulating flange is assembled, the parts should be tightened and the tightening parts and the insulating parts should be inspected one by one. Parts that have been sheared and deformed shall not be used. 9.1.4 When the insulating flange is assembled, the Each bolt is tightened to the required tightness when the insulation seal is reached. 9.1.5 Before installing the seal of the heart-shaped rubber seal of the type I insulation flange, the seal should be cleaned and put into a suitable place, and then the heart-shaped rubber seal is placed in the place. No misalignment is allowed. 9.1.6 When assembling the type I insulation, just make sure that the flange surface and the insulation body are completely in contact with each other, and then lightly pre-tighten.6 The materials listed in Table 4 or other materials with similar properties to these materials can be used to make the selected lining. Table 4 Materials for the field training set
Pressure lifting
Risk glass
264C Oxygen some products pressure ring increase cloth
Deep package
4330 Glass fiber plastic
GFT 5133
JB29-8
The materials listed in Table 5 can be used to make frequency wheel continuous lack of flat circle with other materials with similar properties of these materials. Table 5 Materials for the control ring
3G2: High tensile strength slate
Epoxy pressure effect disease and machine
133G Fiber raw material
Ja 1579
GD/I =129 5
JE 2344
7.4.8 The insulation flange and the insulation flange should be made of two parts respectively. When both parts are made of the same material as the insulation pad, the two parts can be combined into an integral structure as shown in Figure 8. The insulation sleeve is bolted and the bolt connection is completed. For the flange:
Type II insulation flange:
Fasteners
$Y/T 0516-1997
The effective length of the flange is m1
Figure 8 Explosion-proof energy barrier
1, = 2t+ - 3
I,--(-
8.1 The fixing of the flange includes bolts. 8.2 The bolts shall be double solid end columns of equal length specified in GBT90[8.3 The screw plate shall be hexagonal screw specified in B/T170. 8.4 The flat plate specified in GB/T07.2 shall be used, but when the nominal diameter of the bolt is less than M24, non-standard self-made washers shall be used: non-standard Japanese In addition to the thickness of the thickened gasket being thickened to m, the other dimensions of the manufacturing should be in accordance with the standard gaskets specified in GB/T2. 9 Assembly and inspection of insulated flanges 9.1.1 The welding of flanges and short pipes should be carried out in accordance with the relevant requirements of the test meeting, the welding seam should be inspected in accordance with the inspection method, the main and return seam maintenance requirements, etc. The groove should be similar to the welding requirements of the pipes in the same position of the insulated flange, and the same requirements should be followed. 9.1.2 When the insulating flange is required to be treated with an inner coating of an insulating material, the inner surface of the insulating flange can be sealed after the welding is completed and the inspection is qualified. 91.3 Before the insulating flange is assembled, the parts should be tightened and the tightening parts and the insulating parts should be inspected one by one. Parts that have been sheared and deformed shall not be used. 9.1.4 When the insulating flange is assembled, the Each bolt is tightened to the required tightness when the insulation seal is reached. 9.1.5 Before installing the seal of the heart-shaped rubber seal of the type I insulation flange, the seal should be cleaned and put into a suitable place, and then the heart-shaped rubber seal is placed in the place. No misalignment is allowed. 9.1.6 When assembling the type I insulation, just make sure that the flange surface and the insulation body are completely in contact with each other, and then lightly pre-tighten.
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