HG/T 2658-1995 Detailed Rules for Quality Classification of Polyvinyl Chloride Polymerization Reactors HG/T2658-1995 Standard Download Decompression Password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG/T2658-95
Quality classification of polyvinyl chloride polymerization kettles
Published on 1995-01-10
Ministry of Chemical Industry of the People's Republic of China
Implementation on 1995-05-01
Chemical Industry Standard of the People's Republic of China
Quality classification of polyvinyl chloride polymerization kettles
Subject content and scope of application
This standard specifies the quality classification details of polyvinyl chloride polymerization kettles. HG/T2658--95
This standard applies to polymerization kettles for producing polyvinyl chloride resin by polymerization of vinyl chloride monomer (hereinafter referred to as polymerization kettles), and meets the following conditions: a. Volume 1~150m*
b. Design pressure of body: vacuum 2.5MPa: Design pressure of jacket: 0.1~1.6MPa.2 Reference standards
GB150 Steel pressure vessels
Welding procedure assessment of steel pressure vessels
JB4708
JB2536 Paint packaging and transportation of pressure vessels HG/T2388 General rules for quality grading of steel welded pressure vessels HG2367 Technical conditions for polyoxyethylene polymerization kettles HG/T2269 Technical conditions for mechanical seals 3 Basic requirements for product quality grading
3.1 This standard is the basis for quality inspection by enterprise quality inspection departments, and can also be used by national and departmental quality supervision and inspection agencies for product quality supervision and random inspection or quality inspection.
3.2 The classification and level of product quality characteristics shall comply with the provisions of Chapter 4 of HG/T2388-92. 3.3 The product quality grade assessment shall comply with the provisions of Chapter 5 of HG/T2388-92. 3.4 When conducting quality inspection on products, the inspected party shall submit relevant information of the inspected products and provide all technical documents and quality management documents of the selected products according to the requirements of the inspecting party. 3.5 If parts and components can be inspected on the products, they shall be inspected on the products to be inspected. Otherwise, parts and components equivalent to the number of products to be inspected shall be taken from the products to be inspected.
Grading rules
4.1 The material part shall comply with the provisions of Table 1. 4.? The welding part shall comply with the provisions of Table 2. 4.3 The body assembly part shall comply with the provisions of Table 3. 4.4 The machining part shall comply with the provisions of Table 4. 4.5 The performance test and accessories part shall comply with the provisions of Table 5. 4.6 The assembly and test run part shall comply with the provisions of Table 6. 4.7 Paint, packaging and documentation shall comply with the requirements of Table 7. Approved by the Ministry of Chemical Industry of the People's Republic of China on October 1, 1995 and implemented on May 1, 1995
Quality characteristics
Name of the body
Signature body simplified
Signature body head
Jacket simplified
Jacket head
Manhole neck
Manhole cover
Manhole flange
Balance tank simplified
1.9Balance tank seal
1.10Welding materials for pressure-bearing components
1.1Transmission shaft and
Stirring shaft
Stirrer
Quality characteristics
Classification
HG/T2658-95
Quality characteristic index
(1) Reaching Class b|| (2) Before feeding, visual inspection should be carried out, and non-destructive inspection should be carried out when necessary, and corresponding records and reports should be made. (2) Reaching E level (2) With purchasing instructions (1) Reaching C level requirements (2) With purchasing instructions (1) Materials (including substitutes) comply with the requirements of drawings, GB150 and "Technical Supervision Regulations for Safety of Pressure Vessels" (hereinafter referred to as "Container Regulations"). (2) Acceptance and re-inspection should be carried out according to the requirements of "Container Regulations", and the control voucher ( (1) Conform to the welding standards and the relevant certificates (2) Control according to the requirements of the "Specification", and the certificates should be traceable. The materials should comply with the requirements of the drawings and HG2367. The materials should comply with the requirements of the drawings and HG2367. The physical objects and the quality characteristics should be verified. Name of the physical objects and the quality characteristics 2.1 Welder qualifications 2.2 Welding process 2.3 Product welding t||2.4 Inside the weld
2.5A and B type welds
Seam excess height (e)
Quality characteristics
HG/T2858—95
Table 2 Welding
Quality characteristics indicators
The welding of the kettle must be performed by welders holding valid certificates for corresponding projects issued by the labor department
With complete welding process assessment and in accordance with the provisions of JB4708mm
Assessment results
Special inspection results Excellent
Inspection method
Grade grade equipment
Inspection welder
File certificate
Verification certificate
In accordance with the provisions of Article 10.5 of GB150, its control certificates are complete and! Verification certificate
with traceability
(1) meet the requirements of level b
(1) meet the requirements of level (1) non-destructive testing must verify the original (2) the same part is not required to be repaired more than once
requirements and the results are consistent with the flaw detection data
(2) the same part returns the drawings and GB150
and the film,
(3) 100% radiographic inspection
repair is not more than twice (2) the same part is returned when necessary (3) 100% radiographic repair is carried out according to GB150 regulations
the level 1 film rate (by number of films
) is not less than 85%, the level 1 film rate of local flaw detection is not less than 85%, the level 1 film rate of local flaw detection is not less than 85% Less than 80%, partial flaw detection grade I film 85%. One-time flaw detection acceptance rate (by piece number) is not less than 80% (4) One-time flaw detection acceptance rate is not less than 94% The acceptance rate (by piece number) is not less than (1) Meet the requirements of grade b (1) Meet the requirements of grade b in accordance with GB150 (2) The height meets the following requirements (2) The same weld height (e) The height difference is not greater than the plate thickness (&) 12250~2 Weld measurement quality characteristics Name
Class A, B
Weld seam width
2.7C, D
Weld leg size
2.8Welded joint
Appearance quality
Kettle body weld
Jacket weld
Quality basis
Property category
HG/T2858—95
Continued Table 2
Quality characteristic index
(1)Weld seam width
Not greater than the outer
width of the groove plus 4
(2)For the same weld
the width of the weld is not much different
(3)For the same type of weld
the width of the weld is not much different
(1)Weld seam width Not greater than the width of the outer edge of the groove
plus 8
(2) The width difference of the same weld is not greater than
(3) The width difference of the same type of weld is not greater than
(1) Reaching Class B| (1) Reaching Class E (1) The weld leg size meets the requirements
(2) When the weld leg size
is less than or equal to 8
, its positive deviation is
3, and the negative deviation is 1
(3) When the weld leg size
is greater than 8 and less than
or equal to 12, its
positive deviation is 4, and
negative deviation is 1
(4) When the weld leg size
is greater than 12,
its positive stop difference is
4,Negative deviation is
(1) Reaching level b
(2) No grooves
, overlaps, obvious
ridges and depressions
Conform to the drawings and
GB150 provisions
(2) When the weld leg size
is less than or equal to 8
, the positive deviation
(2) When the weld leg size
is smaller than
When the weld foot size is greater than 8 and less than or equal to 8,
is 3, the negative deviation
, its positive deviation is 3, and the negative deviation
is 2
(3) When the weld foot size
is greater than 8 and less than or equal to
, its
positive deviation is 4, and the
signal error is is 4, the negative deviation is 1.5 (4) When the size of the weld foot is greater than 12, its positive deviation is 4. The negative aberration is 2 and the aberration is 2 (4) When the size of the weld foot is greater than 12, its positive deviation is 4 and the negative deviation is 3. There shall be no cracks. Defects such as pores, arc pits and slag inclusions shall not be retained. Slag and splash shall not be retained. Undercuts are not allowed in the welds of pressure-bearing components. They shall comply with the drawings and the provisions of GB150. Inspection method: Check the original certificate weld. Measuring instrument: Special measuring tool. Evaluation result: Excellent inspection result!
Same type
Welding system
Type, shape
Welding, welding
Joining method
Quality property name
Non-destructive testing
Marking document
Post-weld heat treatment
Welding record
Welder's stamp
Quality property
Property category
HG/T2858—95
Continued table 2
Quality property index
(1)Non-destructive testing certificate complies with the provisions of GB150 (2)With non-destructive testing marking parts Figure (3) The marking is clear and the position is accurate (when the drawing or process regulations do not allow stamping, there should be traceable credentials) (1) The heat treatment process specifications that meet the drawing (including heat treatment temperature, holding time, heating and cooling speed, workpiece temperature difference, furnace temperature, installation position and quantity of thermocouples, etc.) (2) The temperature control automatic measurement records and reports that meet the process specifications
Meet the requirements of welding process specifications and are complete and accurate (1) The welder's stamp position diagram of the main pressure-bearing component weld (2) The stamp is clear and the position meets the process requirements (when the drawing or process regulations do not allow stamping, there should be traceable credentials Verification materials) Inspection method
Verification certificate
Verification process
Standard records
and report
Verification record
Verification of physical objects
and prior certification
Evaluation result
Inspection result Excellent
Grade specification
Quality plate characteristics
Name
Old body garden
Yao body straight
3.3 Welding cloth
Type of weld
Mismatch
Edge filling difference
Weld correction
Angle filling difference
3.6 Filling Body actual
Measured thickness
Polymerization sign
Surface quality
Sign internal polishing
Bright quality disk
Quality disk characteristic
Property category
HG/T2658-95
Table 3 Sign body assembly
Quality disk characteristic indicators
Conform to the drawing and the provisions of HG2367
(1) Meet the requirements of grade b
(2) Class A welds shall not have holes
Plate thickness (&)
208402
Conform to the drawing and the provisions of G8150
Class A.
and not more than and not more than and not more than and not more than and not more than and not more than
≤0.108+1 and not more than 4
≤0.10%+1.5 and not
greater than 4.5
not less than the nominal thickness & minus the negative deviation C of the steel plate to meet the requirements of grade b, surface damage should be repaired
ear doctor slip transition
specially in accordance with the requirements of drawings and HG2367
Meet the requirements of GB150
≤110+2 and not too large
Assessment conclusion
Quality sustainability
Name
Head forming
Tube flange
Relative position between source hole and shell
center line
3.11Tube flange
Surface and shell
center line perpendicular
3.12|Support orientation|| tt||and size
Total length of the body
3.14
Quality characteristics
category
HG/T2658--95
Continued Table 3
Quality characteristics index
(1) Check its conformity with the drawings of GB150 and the provisions of Articles 10.2.2, 10.2.2 and 3 of GB150. The maximum gap is not large (2) The wrinkle depth is not greater than 1 and there is no tension. It complies with the requirements of Article 3 of GB150 and the drawings and the requirements of Article 10.2.3.7. It complies with the drawings and the requirements of HG2367 and the requirements of Article 5.1.3.10 of HG2367. Evaluation results Inspection results are excellent Inspection methods Special sample
Steel tape measure
Check
Name
Each joint
Edge
Screw hole
Center circle diameter
Each joint
Edge
Sign body
Any two
Hole chord length allowance
Upper and lower joint
Inner hole
Axis tolerance
4.4Each joint is level
Facing the axis
|Verticality
Station
Balance accuracy of agitator
Manhole flange
Sealing surface quality
Manhole cover seal
Cover quality
Transmission shaft and
Stirring shaft straightness tolerance
Transmission shaft and
Stirring shaft joint
Mating surface
Vertical to the axis
Straightness tolerance
4 .10 Coaxiality of each fixed
plane of the frame
Tolerance
Quality
Classification
HG/T2658-95
Table 4 Machining
Quality index
Conform to the requirements of the drawing and GB150
Conform to the requirements of the drawing and HG2367
Conform to the requirements of the drawing and HG2367
Inspection Method
Micrometer
Special measuring tool
Evaluation result
Inspection result Excellent
Grade Grade
Verification record Real
Conform to the drawing No damage Conform to the drawing No diameter Conform to the drawing No diameter Measure the surface and take effective measures to penetrate the surface and take effective measures to penetrate the surface and the roughness is relatively similar
0.8 times the grade e allowable
Protection measures
0.9 times c grade
Take protective measures
Comply with the drawings and
HG2367 specifications
Verification records or
Quality characteristics
Kettle body strength
Jacket strength
Balance tank strength test
Air tightness test
Safety valve
Discharge valve
Mechanical seal
Reducer
Motor
Characteristic category
HG /T2658—95
Table 5 Performance test and attachments
Quality characteristic index
(1) Reaching b grade
(2) One test
Conforming to the drawing and the provisions of HG2367
With the manufacturer's complete quality certificate, purchase instructions, and re-inspection certificate
(1) Reaching b grade
(2) Re-inspection
(1) Reaching c grade With the manufacturer's complete
complete quality certificate
(2) With purchase It is proved that it complies with the regulations of HG2367. Evaluation results Inspection method Inspection results Excellent Verification Pre-certification Verification certificate Quality characteristic Name Output shaft of reducer and transmission shaft are coaxial Tolerance of radial runout of the rear shaft after the transmission shaft is connected with the stirring shaft Transmission shaft installation machinery Seal or packing
Radial runout of the shaft
Coaxiality and clearance of the bottom bearing and
mixer shaft
No-load test
6.6 Water-added load
Nitrogen-filled test
Quality characteristic category
HG/T2858—95
Table 6 Assembly and test
Quality characteristic index
0.9 times b-level allowable
Conform to the drawing and HG236 7 regulations
(1) Operation time 1 hour
(2) The kettle body has no obvious vibration and heating phenomenon
(1) Operation time 2 hours
(2) The motor current is not more than 70% of the rated current (3) The temperature rise of the lubricating oil does not exceed 40℃, and the maximum temperature does not exceed 80℃
(4) The comprehensive noise is not more than 85 decibels when detected at 1 meter away from the main engine
(1) The kettle is filled with nitrogen to the design pressure and operated for 4 hours (2) All static sealing surfaces must not leak
(3 Packing The seal leakage is not more than 25mL/h (4) The mechanical seal leakage complies with the provisions of HG/T2269 Inspection method
Verification recordbZxz.net
Verification record
Verification record
Evaluation result
One-time return
Inspection result
Grade classification
Quality
Name
Inside of the kettle
Cleanliness
Rust prevention, oil
Paint and machinery||tt|
Nameplate and registration plate of machined surface
Factory documents
Quality characteristic category
5 Summary table of product quality inspection
HG/T2658-95
Table 7 Paint, nameplate and factory documents
Quality characteristic index
No water accumulation and residue
(I) Comply with the requirements of the drawing and JB2536
(2) The paint surface is smooth, the color is uniform and beautiful, which is in accordance with the requirements of the drawing and JB253 6
(1)Comply with the provisions of GB150 and "Container Regulations" (2)The nameplate position complies with the drawing provisions
(1)Comply with the provisions of HG2367 and "Container Regulations" (2)Complete, complete and correct
Evaluation results
Inspection results
Inspection methods
Grade standards
Verification of physical objects
Verification vouchers
The product quality inspection summary table should be filled in Table 8. And it should comply with the provisions of Article B3.5 of HG/T2388-92. Table 8 Product quality inspection summary table
Quality pending
category
6 Product quality grade assessment
Qualified grade
Unqualified
Product number:
Grade item rate%
Excellent grade+
Qualified grade
Use the data in Table 8 to compare with Table 3 in HG/T2388-92 to assess the product quality grade and fill in Table 9. The format should comply with the provisions of HG/T2388-92.
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