Some standard content:
This standard is in line with the standard of the "standard matching connection parts". GB/T9125-2003
This standard adopts the shortened version of G3/T91352 to reflect the uniformity of the pipe flange standard: This standard does not replace the standard/T9125-19R8 sales pipe manufacturing method technical policy. (P/9125~1983 has been replaced by 3/T9.24-20M00. In order to make the design and use of the flange and gasket in the pipeline process, the length calculation of the flange connection parts is temporarily calculated in Appendix A of this tour, which is shown in the figure. This standard is a guide to the development and application of the standard and is an exploratory appendix. This standard is proposed by the China Machinery Industry Association. This standard was issued by the National Technical Committee for the Promotion of Chemical Parts Standards: This standard was initiated by the China Machinery Science and Technology Research Institute, the National Chemical Engineering Design Center, Dongcheng City High Strength Explosive Parts Co., Ltd., Shaoxing County High Strength Wenggu College; the city source standard has a public administration. The main people in charge of this standard are: Ji Shexiao, Xia Baoping, Ying Daosuan, Qiao Nai Guang, Li Jiangzhuo, Lin Zhongshi, Cheng Nenglin. This international standard was first issued in 3 years.
1 Scope
Fasteners for pipe flange connection
CB/T9125——20C3
This standard specifies the types and sizes of fasteners for pipe flanges, as well as their mechanical properties, technical requirements, specifications and markings: This standard is suitable for fasteners for pipe flanges made of different materials such as steel flanges, iron flanges, alloys and flanges. The fasteners specified in this standard include hexagonal head bolts, equal-length double-ended bolts, full-thread bolts and hexagonal ears. 2 Normative referenced documents
The items in the following documents become the products of this standard through the use of this standard Clauses. For all dated referenced documents, all subsequent modifications (excluding those resulting from manufacturing errors) and revisions apply to this standard. However, the parties to an agreement based on this standard are requested to discuss whether the most recent version of these documents can be used. This is a reference document, the latest version of which applies to this standard: R/T2 Fasteners End of external threaded parts
GTA/95.1 Accumulated parts acceptance inspection
4T95.2 Fasteners: and packaging
Universal effectiveness basic. Basic dimensions (E5) 726: 1903.MO2)GT 196
GB/T197
General explosion tolerance TSO9G5-1:1998MOD)G3/T 99°
Equal length double head exploratory grade
G3/T 1223
Stainless steel exposed
G3/1132
GH:r -237
Structural high strength large six use screw
Firmware recording method (15095S1:98)
3/ 207?
Alloy structural snail
GB/T 3CDS. 1
GB/T 3CDS. 2
GE/T 3208.4
Tightening machine bolt (i1586-1::390) Fastener machine performance cabinet thread explosion efficiency 1150898-299 series machine performance frequency threading model id30858-6197GB/T 3393.6
Mechanical parts with stainless steel, screw (ITIS3506-: 1S97) Hexagonal bolt (E919) 4014, 199) GB/T782
G/85 hexagonal thread S087
G3/6701 type 1504032: 1933
G/61 hexagonal thread 073: 195)
J471 force instrument without inspection system
3 types and sizes
3.1 Hexagonal head bolt
3.1.! The size of the hexagonal head bolt for general use shall comply with the heat setting of 1/5752 (thread> and GB/T57851 thread), as shown in Figure 2. The end of the bolt shall be as shown in the example.
GB/T9125—2003
National 1 Hexagonal head screws
3.1.2 The specifications and performance of hexagonal head bolts for flanges shall comply with the provisions of Table 1. Table! Specifications and performance of hexagonal head screws
GB/T 78?
(commodity home)
3.7 Equal length double-headed coal
_.M2.M1.M1:.M20.M2.127.M3),M33 performance science
5.6.8.8,4250.A2-7>,A4-7
3.2, 1 The type and size of double-headed fittings for use in the operation of the flange shall comply with the provisions of the double 1 standard, and the end angle shall not be shown in the example, as shown in Figure 2. The screws of the effective specifications M36 and above (including M6) shall be The size of the fine pitch thread should comply with the provisions of GB: 1H5: (the most common specification is B/197. The angle of the screw thread should comply with the provisions of GH/?, and its technical requirements should comply with (F/T901 specification 2.2.2 The specifications, performance, etc. of equal-length studs and the material number should comply with the provisions in 2. Table 2 Specifications, performance, etc. and material brands of equal-length studs (commodity parts) 9125
(Special fasteners)wwW.bzxz.Net
M12,MJ4,MJG,M20.
M24,M27,M1..3:
M35x3.M30x.3.M2/:
M4:XJ,M7、M5?4、
M5624.M54X4.M73X4.
MfsX4.V82×1,Mu0/
Performance and load
5. 5.3. 5.1-30, 42-70,44-73
Design: According to the negotiation between the supply and reduction parties, 5Mn grade double-end accounts can be shared, 3m account 3.3 full screw mosquito smoke column
village structure brand
5C.rMe.A.2ECr2Me:VA.
OC-1SNiS .cCr7Ni_2Mu2
3.3.1 The type and size of the full-thread screw resistance shall be specified in the new area 3, and the effective specification M3 shall be 1 (other [MG>'s Ducheng adopts the group tooth screw effect, the gill effect of the English car size shall comply with the provisions of T1SC, and the degree of conformity shall be in accordance with the provisions of GB/T197 center 5: the mold cabinet medium pouring engineer shall comply with the provisions of GBT2 and the other technical requirements shall comply with the provisions of 1.2
3 3.3.2 The material grade of the company's desired screw should comply with the requirements of Table 3. Table 3 Specifications and material grades of all-in-one screws -RT 2125: Special parts: M2M2.M:6, M20.M24.327, M30, M33MR×3, M39XS.M42:3.M5X3, M48×3.M3X4.M56X4.M64X4, M7GX, M73X4. Note: according to the requirements and methods, ~.9 full frequency The system can use 3T.hI frequency minister, 3.4 solution mother
CB/T9125-2003
to and brand
35CtM4.25Cr2MoVA.
Cr18Ni3,oC-17Ni122
3.4.1 with eight years head light media with the type and size of the screw Dan should be consistent with the specifications (/ 17 crown, as shown in week 4. with double real screw, bad effect explosion column with the type and size of the mother box 5 and table 1, the basic size of the screw effect should be determined by the medicine table T/T19, the case should comply with the provisions of CB/?mH, the technical requirements should comply with the provisions of G3/TS:70.
With 4-angle nuts
Available types
5-inch hexagonal nut
GB/T9125—2003
Sizes of large hexagonal nuts for pipe flanges
.31, 4
M70X4M76?:
Juice 1: Except for M14, the flange sizes of M12--M3 are opposite to those specified in GE:T1229. 2. According to the supply and demand, the frequency can be 52-90. The unit is variable. M82×4: M90×4. GB/T9125-2003. 3.4.2 The specifications, performance grades (commercial fasteners) and material grades (special fasteners) of each fastener shall comply with the current provisions of Table 5. Table 5 Specifications, performance grades and material grades of nuts (GA.T 9t26 (special fasteners)) M10.M2.M..M.X20. M2:.M27.M3J.M33
M2.M4 :6.20.M24,
M27430,M35
M36 :3.M30x 5.12 :3
M4EX3,M4Sx2.M52X9.
M5E4Me+X4,M7EX5,
M7X4,MA2X4.M9nX4
Material and mechanical properties of the hardware
Featured velvet
A2·5ctDs:M241
A2-7UD:M
14-70 (3$ M24)
Material brand order
sartMc
(crigi
Ger1?Vi ?Mo?
The material and mechanical properties of the surface compression parts shall comply with the requirements of CI/T 3Js.1, (:B/T 308.2, CB/T3U08. 4 and GB/T3098.6,
4.2 and the chemical composition, stability and mechanical properties of the materials used for the fasteners shall meet the requirements of the table (current requirements). The mechanical properties test plan shall be the roughness after heat treatment and the cutting direction of the mechanism shall be accepted. The test details are as follows: a) roughness diameter: 40 mm, sample at the center: b) rough diameter> mm, take 1/4 of the point diameter as the center. Equal length double-headed drying racks and full-screw drying fences should be tested for energy in batches. Screw cores should be tested for lack of scrap in batches. Table 6 Special firmware materials and machine model properties
Chemical warfare analysis
Manufacturer's book
30CrMoA
25C12MY4
OCr15N9
uCt17Ni12M>2
(Implementation standard)
GB:T 3c7
GB:T SG7?
GR/T -226
GB/T :236
Double treatment plan
(National)
(National fire s:
(EkESr:
Machinery sensitive fat basic>
:M24--M76
269--321
234-285
259--321
225--277
3E01 In a 20-point distribution, the product should be designed according to the low shape of the test, and the average low impact of the five tests should not be less than 2" [kernel skin in the same place, GR/T 9125---2003
5 Technical requirements
5. 1 The technical requirements of product case parts
such as thread grade, performance, tolerance, surface reflection, acceptance and packaging of product hardware should be in accordance with the relevant national standards.
5.2 Special hardware
The raw materials used for special hardware should have the material certificate of the manufacturer. 15) Special hardware should be sampled and inspected after heat treatment in batches. The inspection results should meet the requirements of Table 5. The mechanical performance of the product should not be different from the performance under the sample state
The performance of the flange should meet the requirements of the graded parts according to 3-19.
5.3 Qualification inspection
5.3.1 The factory inspection of product hardware (hexagonal nuts, hexagonal nuts, etc.) should be carried out in accordance with the requirements of national standards. 5.3.2- Special fasteners
Factory inspection of special fasteners is carried out in batches, with the same material, number, specification, length (screw inspection, length difference: 15m or 20mm when the length is 300mm, length difference: 5mm when the length is >100mm), machining, heat treatment, surface treatment process and frequency column as the same batch. The same material structure, furnace number, thread specification, machining, heat treatment process and surface treatment process are the same, the maximum quantity of lubrication and drying is 0, 5.4 Surface treatment
Fasteners made of stainless steel and containing gold should be treated with bottle treatment. 5.5 Packaging and collection
The parts shall be modified and assembled in accordance with the provisions of GB/T9.1. The factory shall provide a quality certificate in accordance with the provisions of GB/T9.1. Contents include:
Part name (package product grade) specification, size and quantity: b) Material brand or performance grade
Marking [use electrical performance paper (product suitability), as the adopted mark number, use material number tape! Special tightness), as this standard number:
d) Factory comparison and inspection mark,
6 Marking and labeling
6.1 Marking
The marking method of commodity firmware shall comply with the provisions of GB.T1232, and the marking method of special firmware shall also follow GB/T135? Marking examples:
Example 1: The six-head light steel with thread gauge = M16, nominal length 1 = 30m, and performance grade 8.8 is marked as: 572M6X
Example 8: Thread gauge = M353. The nominal length is 16tam, the wheel material is 35CMA, and the deep threaded rod is marked as. Double-head screw GD/F912MXX16CrM
Tax 3: The number of screws with a specification of W4, a common length of 3, and a brand number of 2A, the standard of which is GB/T9135M24X12025CMVA Example 4: Deep-effect specification MT, with a large angle of 10, its mark: GBS170M1610
Example 5: Special-purpose screw with diameter specification D=M56X3 and material number 35CrMo, its mark is GR/Tu125M56×.335C:Mo
6.2 mark
GBT 9125--2003
On the top surface of the hexagonal head screw, the top of the explosive, the ear of the screw, the performance grade or material brand code and the fastener manufacturer's special mark shall be stamped with other methods. See Table 8 and Table 7 for the coordinated symbol code of the performance grade or material brand.
Symptoms
General code 5
Standard code
Performance grade code
Material brand code
25C12MnVA
For 35C with low impact test, the substitute product shall add 1.\. A.72
oCr18Ni9
0C17N.1Mo2
G/F9125—2003
Appendix A
(Informative Appendix)
Method A. for measuring the length of pipe flanges using black hardware! This document contains the method of calculating the length of the required fasteners for connection. A. The length of the fasteners () can be calculated according to the following formulas: 2.1 Calculation formula
Length 2+++
(for flat and raised face flanges of FN0.25~PN2.0MPa) 222
(for loose-fitting flanges and flanged loose flanges of PN0.25~PN2.MPa) Length
(for butt-welding flanges and flat-welding flanges of PN0.7G.~PN2.MPa) Length: 2(0120)2m1221:+21
(for flanges other than PN11.0, PN5.0 and PN26.0MPa) Note: Length 2) 2+2+2+2+||tt| | (Applicable to flanges with IN11.CIN15.0 and PN26.0MPa) 2 = 2122m2 + 2
(Applicable to butt-welded loose-fitting flanges) Dry length = 2++2F-+2-2++
(Applicable to butt-welded flanges or flat plate flanges) Length = 22
(Applicable to all concave and convex flanges) Screw length: = 2(C+2C-F) → $+2m+22+++T (Applicable to all flanges)
Where:
--length of the fastener (hexagonal bolt, stud and full-thread screw), in meters (mm) Flange thickness, in millimeters (mm) (determined according to the corresponding flange standards) Standard quality difference, in millimeters (mm) (according to Table A.1 Determined): The actual surface height of the flange is in millimeters (mm) determined by the corresponding flange standards. The convex surface height of the flange is in millimeters (m). Determined by the corresponding installation standards: The good ring thickness of the flat welding ring plate type loose flange is in millimeters (m). Determined according to the cabinet standards: The good ring thickness of the loose flange with a neck is in meters (mtr). Determined according to the customer's requirements: The edge ring thickness of the loose flange is in actual meters (m). <Determined according to the corresponding flange standards> 1 The height of the bad connection surface flange is in mm (determined according to the corresponding flange standards) FS-open connection surface flange is approximate The distance unit is m> (determined by Table A2 or the corresponding flange standard): 22 "The maximum distance between the flange and the bolt, the unit is millimeter (mm) <determined by Table A., use m when matching with the specification, and use m when matching with the stud: 2--The length of the angle band of the fastener, the position is required (mm) (determined by Table A.3): T, the minimum extension length of the hexagonal head bolt during installation, the unit is meter (day) and one pitch is calculated, see Table A.3); ! Length difference of the bolt or screw, the unit is meter (mm) determined by Table A. 7--Thickness of the sheet, generally take T=3m,
A.2.2 Variable avoidance factor
When the deviation reaches three degrees, the positive value shall be issued, and its value shall be in Table A. Table A. 1 Flange thickness deviation
Flange to flange
Approximate distance between flanges is shown in Table A2. B/9125—2003
Single world is *
Flange thickness deviation C
A.2 Ring wrapping surface full blue ketone distance
PN2.0 (VPe)
Ring connection measurement method some recent years distance S
Unit is ||tt ||rNI1.0(Mre>N15.utMFPx6.C(MP)PN:,n(VPe)PN,0(MT)
The maximum thickness of the mother, the length of the angle end of the fastener, and the minimum extension length of the source Xu and the source Gui are calculated A.2. Table 4.3
Some effective code
Elongation magic
Single enterprise is measured pulp
M353:M39x3
CB/1 9125--2003
Screw double-end
MEXM15X3
Installation degree.3Continue
52>1:M$6X4
The length deviation of the hexagonal head end diameter or tender is A. Students. Change A,4
The six-headed feeling diameter can be long
2504315
315-2, 400
49276563
5005820
630-70
A, 2. 3 About the period
M$+X4M7eX$
length difference
M3G×+
unit method
on Liu Gong's ratio of its length wood calculation potential thick flow, the calculated length is the minimum length competition, the selected hexagonal meaning of the problem or the exploration of my exhibition feel down to the rounded to 50,
B,1 doubtful reason for the use of control
(information clear spring)
tube cover link use case drawing parts quick network guide
product entry angle head screw wheel grape transmission conditions point meet the following requirements: FN:2. 0 MPat 20 bar>:
equipped with non-metallic soft replacement piece
good quality you, explosion and no harmful field. The use conditions of the double-headed cauldron diameter modification mother should meet the following requirements: B. 1.2
PN5.) MHa stbar
b) refers to the occasion of strong sugar ring.
and 1.3 In addition to the above conditions, special screws should be used (double-headed or full-height screws). GH/T $125—2005
Cat-wound ground piece, climbing packing gasket, tooth combination piece, gold mesh ring gasket and other gold layer cattle free products should be 35C1M0A25r25V and other high-change cladding (double-headed or full-height screw). B.1.4 For commercial pressure of PN ≥ 15.0MPa, the bottom head is made of threaded screw. B.2 Suitable pressure range of fasteners
According to the type, energy level and material grade of the fastener, the pressure and temperature range are determined. See E1 and E2, Table H, 1. Suitable pressure and temperature ranges for commercial fasteners, standard type
(East number) || tt||Six-head combustion test
(CBTE2)
Double-head olefin stop
EGRTSDE
Product country
Explosion type
(label)
Head head general family
::H/T9125
Product grade
Grade A, Grade
M17--.113 *
M35x~M5Fg
M13--M3:
M36x3--exe
Product rating
Performance rating
(Product’s most stable peak)
A3·70
Nominal force
MPe(hsT)
Applicable pressure-temperature range for stable performance|| tt||MI9~M33
:M3E×3--M90X4
25Cr2VA
CC.:7N:_2M02
public Zhengzheng
MP'ntazr)
1. Group:
2-20-~-263
.._9G+cUu
1-: at
-. 146+600
workflow seat
—20-1630
136--5C0
196---603
Match with non-metallic soft replacement piece
Good quality, explosion and no harm to the environment. The use conditions of the double-headed cauldron diameter change mother should meet the following requirements: B. 1.2
PN5.) MHa stbar
b) refers to the occasion of strong sugar ring.
and 1.3 In addition to the above conditions, special screws should be used (double-headed or full-height screws). GH/T $125—2005
Cat-wound floor piece, climbing packing gasket, tooth combination piece, gold mesh ring gasket and other gold layer cattle free products should be good at 35C1M0A25r25V and other high-variable oysters (double-headed or full-height screws). B.1.4 For commercial pressure of PN ≥ 15.0MPa, the bottom head is made of threaded screw. B.2 Suitable pressure range of fasteners
According to the type, energy level and material grade of the fastener, the pressure and temperature range are determined. See E1 and E2, Table H, 1. Suitable pressure and temperature ranges for commercial fasteners, standard type
(East number) || tt||Six-head combustion test
(CBTE2)
Double-head olefin stop
EGRTSDE
Product country
Explosion type
(label)
Head head general family
::H/T9125
Product grade
Grade A, Grade
M17--.113 *
M35x~M5Fg
M13--M3:
M36x3--exe
Product rating
Performance rating
(Product’s most stable peak)
A3·70
Nominal force
MPe(hsT)
Applicable pressure-temperature range for stable performance|| tt||MI9~M33
:M3E×3--M90X4
25Cr2VA
CC.:7N:_2M02
public Zhengzheng
MP'ntazr)
1. Group:
2-20-~-263
.._9G+cUu
1-: at
-. 146+600
workflow seat
—20-1630
136--5C0
196---603
Match with non-metallic soft replacement piece
Good quality, explosion and no harm to the environment. The use conditions of the double-headed cauldron diameter change mother should meet the following requirements: B. 1.2
PN5.) MHa stbar
b) refers to the occasion of strong sugar ring.
and 1.3 In addition to the above conditions, special screws should be used (double-headed or full-height screws). GH/T $125—2005
Cat-wound floor piece, climbing packing gasket, tooth combination piece, gold mesh ring gasket and other gold layer cattle free products should be good at 35C1M0A25r25V and other high-variable oysters (double-headed or full-height screws). B.1.4 For commercial pressure of PN ≥ 15.0MPa, the bottom head is made of threaded screw. B.2 Suitable pressure range of fasteners
According to the type, energy level and material grade of the fastener, the pressure and temperature range are determined. See E1 and E2, Table H, 1. Suitable pressure and temperature ranges for commercial fasteners, standard type
(East number) || tt||Six-head combustion test
(CBTE2)
Double-head olefin stop
EGRTSDE
Product country
Explosion type
(label)
Head head general family
::H/T9125
Product grade
Grade A, Grade
M17--.113 *
M35x~M5Fg
M13--M3:
M36x3--exe
Product rating
Performance rating
(Product’s most stable peak)
A3·70
Nominal force
MPe(hsT)
Applicable pressure-temperature range for stable performance|| tt||MI9~M33
:M3E×3--M90X4
25Cr2VA
CC.:7N:_2M02
public Zhengzheng
MP'ntazr)
1. Group:
2-20-~-263
.._9G+cUu
1-: at
-. 146+600
workflow seat
—20-1630
136--5C0
196---603
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.