This standard applies to the design, construction and acceptance of foam plastic anticorrosion insulation layer for buried steel pipelines with a medium temperature not exceeding 100 degrees Celsius. SY/T 0415-1996 Technical Standard for Rigid Polyurethane Foam Plastic Anticorrosion Insulation Layer for Buried Steel PipelinesSY/T0415-1996 Standard download decompression password: www.bzxz.net

Standard of the People's Republic of China for petroleum and natural gas industry Technical standard for rigid polyurethane foamed coating for buried steel pipelineSY/F 0415-96Editor: Oilfield Construction and Design Institute of Daqing Petroleum Administration Bureau Shengli Petroleum Administration Bureau Oil Construction-· CompanyApproving department: China Shihan Natural Gas Corporation Petroleum Industry PressBeijing, 1996Appendix DAppendix EAppendix FTest method for heat resistance of foamed plasticsPreparation of test specimens for foamed plastics performance testExplanation of terms used in this standardAdditional explanationAccessories for rigid polyurethane foamed coating for buried steel pipelineAppendix to technical standard text
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(3上)
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Document of China National Petroleum Corporation
(96) CNPC Technical Supervision No. 561
Notice on the approval and release of five oil and gas industry standards including "Technical Standard for Direct Current Drainage Protection of Buried Steel Pipelines"
To all relevant units:
Five oil and gas industry standards (drafts) including "Technical Standard for Direct Current Drainage Protection of Buried Steel Pipelines" have been reviewed and approved and are now approved as oil and gas industry standards for release. The numbers of the prepared standards are as follows: Name: Serial No.
SYT 0017 96
SYT 0090--96
SY/T 0415
SY7T 0447-96
$Y 7T 0546--1996
Technical standard for direct current discharge protection of buried steel pipelines (replacing SYJ17-86)
Design of instrument control system for oil and gas pipelines
Technical standard for rigid polyhydrogen foam plastic anticorrosion and insulation layer of underground steel pipelines (replacing
SYJ 18--86SYJ 4015--87.
SYJ 4016-87)
Technical standard for epoxy coal-medium asphalt anticorrosion layer of buried steel pipelines (replacing SYJ28-87.
SYJ 4047: --90)
The collection and determination of corrosion products
is based on the standard and will be implemented from June 1, 1997. China National Petroleum and Natural Gas Corporation
November 15, 1996
1.0.1 This standard is formulated to ensure the quality of rigid polyurethane foam plastic (hereinafter referred to as foam plastic) anti-corrosion and thermal insulation layer of buried steel pipelines. 1.0.2 This standard is applicable to the design, construction and acceptance of foam plastic anti-corrosion and thermal insulation layer of buried steel pipelines with medium temperature not exceeding 100°C. 1.0.3 When foam plastic anti-corrosion and thermal insulation layer is used for buried steel pipelines: In addition to the approval of this standard, it shall also comply with the provisions of relevant national standards (specifications). 1.0.4 Applicable standards
GBT 1040-1992
GBT 14081989
GBT 14101989
CR T 1633-1979
GBT 1720\-1979
GB / T 1731 -1993
GB T 1732- 1993
GB r T 1763--1979
BT 1842--1980
GBT 27921981
GB T 3682-1983
GB T 4472- 1984
GB 7T 5470 - 1985
GBT 6112-1985
GB T 6343---1995
Test method for tensile properties of plastics
Test method for power frequency electrical strength of solid insulating materials
Test method for volume resistivity and surface resistivity of solid insulating materials
Test method for softening point (Vicat) of thermoplasticsDetermination of adhesion of paint films
Determination of flexibility of paint films
Determination of impact resistance of paint films
Determination of chemical resistance of paint films
Test method for environmental stress cracking of polyethylene
Determination of 180' peel strength of positive-sensitive tapeTest method for melt flow rate of thermoplasticsDensity of chemical products, determination of densityTest method for melt flow rate of plastics
Determination of impact resistance of thermoplastic pipes and fittings (drop hammer method)
G3T 8813: :-1988
GB/T 8923-—1988
Compression test method for rigid foam plastics
Rust grade and rust removal grade of steel surface before paintingGB T 12008.1 --1989
GB,T 12008.2-1989
GB 7T 12008.3--1989
GBT 120084--1989
GB/T 12008.5-1989
GB T 12008.6 -1989
GBT 12009.1--1989
GB/T 12009.2--1989
G:BT 12009.3--1989
GB7T 12009 4 -1989
Nomenclature of polyether polyols
Specifications of polyether polyols
Method for determination of sodium and potassium in polyether polyols
Method for determination of acid value in polyether polyols
Method for determination of water content in polyether polyols
Method for determination of total content in isocyanates
Method for determination of hydrolyzed chlorine content in isocyanates
Method for determination of viscosity of polymethylene polyisocyanates
Method for determination of isocyanate content in polymethylene polyisocyanates
Technical standard for ethylene anticorrosion layer for buried steel pipelinesSY 7 T 4013--95
2 Structure of anticorrosion and thermal insulation layer
2.0.1 The foam anticorrosion and thermal insulation layer of steel pipe (hereinafter referred to as anticorrosion and thermal insulation layer) is a composite structure composed of anticorrosion layer, thermal insulation layer and protective layer. Anticorrosion layer
refers to anticorrosion coating or hot melt adhesive layer with anticorrosion performance; thermal insulation layer
refers to foam plastic layer; protective layer
refers to polyolefin plastic layer.
The material and thickness of the anticorrosion layer shall be determined by design, but the thickness shall not be less than 80m1. 2.0.3
The thickness of the thermal insulation layer shall be determined by the economic thickness calculation method (the calculation formula is shown in Appendix A of this standard), but shall not be less than 2511m1. The thickness of the protective layer shall be determined according to the pipe diameter and construction process, and shall not be less than 2.0.4
The end face of the anticorrosion and thermal insulation layer must be sealed and waterproofed with a waterproof cap. 3,1,1
3 Materials
Anti-corrosion coatings
The overall performance shall comply with the requirements of Table 11.
Performance index of anti-corrosion coating
Attachment (grade)
Flexibility (mm)
Impact strength (
Resistance to C solution
Resistance to 10N0H solution 8
Resistance to Nac solution
No change for 3001h
No change for 3001h
3.2 Foam plastics
Table 3.1.1
Test method
GBT 1720
GBT 1731
GB/ T:1732
GB/T 1763
GB/T 1763
GB/T 1763
The quality of raw materials of foam plastics, polyisocyanate, polyether polyol and auxiliary polyisocyanate should meet the requirements of 3.2.2.
249-32
Small solution
(P-s.25C)
Test method
T 1209,1- 1209.4
The weight composition of polyols should meet the requirements of Table 3.2.3. Hydroxyl value
(mgKOH/g)
.470~510
Quality index of polyether polyols
Moisture content (%)
(mgkoH/g)
Test method
GB12008.1～12008.6
The performance index of the foam plastic layer shall comply with the provisions of Table 3.2.4. Foam plastic layer performance index
Apparent density (kg) nr)
Compressive strength (MP)
Rate (gcmy
Thermal conductivity (wm-c)
Dimension change (%)
Weight change rate (%)
Strength growth rate (%)
The heat resistance test condition is 100℃96hl
For the preparation of foam plastic performance test specimens, see Appendix F3.3 of this standard Polyethylene plastics
Test method
GB/T 6343
GBPT&SI3
Appendix B
Appendix D
Appendix D
The properties of polyethylene raw materials and pressed sheets shall comply with the provisions of Table 33.1. Performance indicators of polyethylene raw materials and pressed sheets
Density (cm)
Polyethylene index Load (kg, 1omim)
Tensile strength (M
Secondary elongation at break (\
0.935 -- 0.950
1.000-1.600
Test method
GB/ T 4472
GB/T 3682
GB/T 1040
GB/T 1040
Ball drop impact strength
Vicat melting point
Embrievance temperature)
Stress cracking time
Breakdown voltage strength MVm
Volume resistivity see·
Chemical corrosion resistance immersion
Io'uNaOH
Heat aging resistance 002400)
Ultraviolet aging resistance
[× 10-4
Continued Table 3.3.1
Test method
GB/T 6II
GB7T 1633
GB/T 5470
GB/T 1842
GBT 1408
GB/T 1410
$Y 40195 Appendix
CB/t 3682
SY/T4013--95 Appendix
Note: The chemical corrosion resistance and UV resistance deterioration index are the tensile strength and elongation after the test. The thermal aging index is the deviation of the melt flow rate after the test and the shear test. Calcium polyamide is not used for this installation. The performance of the protective film shall comply with the provisions of Table 3.3.2. Performance indicators of protective layer
Tensile strength
Axial (M)
Circumferential (M
Deviation' ()www.bzxz.net
Elongation at break (%)
Environmental stress resistance (F50)
Compression hardness ()
231-207
Performance indicators
GB7 T 1(40
GB7T 1040
GB7 I 1040
GB/ T 1842
SYT 4013-95 Appendix
Note: The deviation is the ratio of the difference between the axial tensile strength and the hoop tensile strength to the lower of the two. 3.4 Radiation cross-linked heat shrinkable materials
3.4.1 Heat-shrinkable waterproof caps (hereinafter referred to as waterproof caps), heat-shrinkable tube wraps (hereinafter referred to as patching strips) and heat-shrinkable patch sleeves (hereinafter referred to as patch sleeves) are collectively referred to as radiation cross-linked heat shrinkable materials.
3.4.2 Radiation cross-linked heat shrinkable materials consist of a base material and a primer. The base material is a polyethylene material that has been radiation cross-linked and has shrinkage: the primer is a rubber-type hot melt adhesive. The use temperature of radiation cross-linked heat shrinkable materials should not be greater than 70°C. When the use temperature is greater than 70°C, other materials can be used. 3. 4.4 The heat shrinkage ratio of radiation cross-linked heat shrinkable materials (after shrinkage: before shrinkage) should be less than 0.45.
Waterproof caps, patch tapes and patch sleeves should be selected according to the pipe diameter. The performance should comply with the provisions of Table 3.4.5.
Performance index of waterproof caps, patch tapes, patch sleeves No.
Tensile strength M[a]
Fracture length)
Softening point||Embrittlement
Environmental resistance Cracking time 0
Breakdown voltage MV
Volume medium resistivity·
Resistance to chemical media corrosion (7d%)
10\HCI
3%NaCI
21x 103
Test method
GBT 1040
GB/T 1040
GB/T 1633
GB/I ​​5470
GB/T 1842
GRT 1408
G8J410
Milk Appendix
SY2 T 4013-
Item:
Heat aging resistance (150℃.168h)
Tensile strength (M)
Breaking elongation (%)
Peel strength (Ncn)
Primered steel pipe
For polyethylene layer
"Indicators
Continued table 3.4.5
Test method
GHT 040
GH/T 1040
GB/T 2792
Note: Chemical medium corrosion resistance indicators: Retention rate of tensile strength and elongation after test 3.4.6
The thickness of the patch tape, patch and waterproof cap meets the requirements of 346. Thickness requirements for patching tape, patching sleeve and waterproof cap Date
Base material (mm)
Base material (mm)
3.5 Material acceptance
Filling deviation
Main raw materials such as polyethylene, polyisocyanate, polyether polyol, anti-corrosion coating and patching materials shall be accompanied by manufacturer, production date, quality certificate and certificate upon entering the factory. Otherwise, they shall not be accepted.
3.5.2 Barreled foam plastic raw materials shall be spot checked according to the provisions of Table 3.5.2. The test items and test indicators of polyisocyanate and aldehyde polyol shall comply with the provisions of Table 3.2.2 and Table 3.2.3.1
Test method
GB/T 6II
GB7T 1633
GB/T 5470
GB/T 1842
GBT 1408
GB/T 1410
Appendix to GB/T 40195
CB/t 3682
SY/T4013--95
Note: The chemical corrosion resistance and UV resistance deterioration index are the tensile strength and elongation after the test. The thermal aging index is the deviation of the melt flow rate after the test. Calcium polyamide is not used for this installation. [12 performance requirements 3.3.2
The performance of the protective film shall comply with the provisions of Table 3.3.2. Performance indicators of protective layer
Tensile strength
Axial (M)
Circumferential (M
Deviation' ()
Elongation at break (%)
Environmental stress resistance (F50)
Compression hardness ()
231-207
Performance indicators
GB7 T 1(40
GB7T 1040
GB7 I 1040
GB/ T 1842
SYT 4013-95 Appendix
Note: The deviation is the ratio of the difference between the axial tensile strength and the hoop tensile strength to the lower of the two. 3.4 Radiation cross-linked heat shrinkable materials
3.4.1 Heat-shrinkable waterproof caps (hereinafter referred to as waterproof caps), heat-shrinkable tube wraps (hereinafter referred to as patching strips) and heat-shrinkable patch sleeves (hereinafter referred to as patch sleeves) are collectively referred to as radiation cross-linked heat shrinkable materials.
3.4.2 Radiation cross-linked heat shrinkable materials consist of a base material and a primer. The base material is a polyethylene material that has been radiation cross-linked and has shrinkage: the primer is a rubber-type hot melt adhesive. The use temperature of radiation cross-linked heat shrinkable materials should not be greater than 70°C. When the use temperature is greater than 70°C, other materials can be used. 3. 4.4 The heat shrinkage ratio of radiation cross-linked heat shrinkable materials (after shrinkage: before shrinkage) should be less than 0.45.
Waterproof caps, patch tapes and patch sleeves should be selected according to the pipe diameter. The performance should comply with the provisions of Table 3.4.5.
Performance index of waterproof caps, patch tapes, patch sleeves No.
Tensile strength M[a]
Fracture length)
Softening point||Embrittlement
Environmental resistance Cracking time 0
Breakdown voltage MV
Volume medium resistivity·
Resistance to chemical media corrosion (7d%)
10\HCI
3%NaCI
21x 103
Test method
GBT 1040
GB/T 1040
GB/T 1633
GB/I ​​5470
GB/T 1842
GRT 1408
G8J410
Milk Appendix
SY2 T 4013-
Item:
Heat aging resistance (150℃.168h)
Tensile strength (M)
Breaking elongation (%)
Peel strength (Ncn)
Primered steel pipe
For polyethylene layer
"Indicators
Continued table 3.4.5
Test method
GHT 040
GH/T 1040
GB/T 2792
Note: Chemical medium corrosion resistance indicators: Retention rate of tensile strength and elongation after test 3.4.6
The thickness of the patch tape, patch and waterproof cap meets the requirements of 346. Thickness requirements for patching tape, patching sleeve and waterproof cap Date
Base material (mm)
Base material (mm)
3.5 Material acceptance
Filling deviation
Main raw materials such as polyethylene, polyisocyanate, polyether polyol, anti-corrosion coating and patching materials shall be accompanied by manufacturer, production date, quality certificate and certificate upon entering the factory. Otherwise, they shall not be accepted.
3.5.2 Barreled foam plastic raw materials shall be spot checked according to the provisions of Table 3.5.2. The test items and test indicators of polyisocyanate and aldehyde polyol shall comply with the provisions of Table 3.2.2 and Table 3.2.3.1
Test method
GB/T 6II
GB7T 1633
GB/T 5470
GB/T 1842
GBT 1408
GB/T 1410
Appendix to GB/T 40195
CB/t 3682
SY/T4013--95
Note: The chemical corrosion resistance and UV resistance deterioration index are the tensile strength and elongation after the test. The thermal aging index is the deviation of the melt flow rate after the test. Calcium polyamide is not used for this installation. [12 performance requirements 3.3.2
The performance of the protective film shall comply with the provisions of Table 3.3.2. Performance indicators of protective layer
Tensile strength
Axial (M)
Circumferential (M
Deviation' ()
Elongation at break (%)
Environmental stress resistance (F50)
Compression hardness ()
231-207
Performance indicators
GB7 T 1(40
GB7T 1040
GB7 I 1040
GB/ T 1842
SYT 4013-95 Appendix
Note: The deviation is the ratio of the difference between the axial tensile strength and the hoop tensile strength to the lower of the two. 3.4 Radiation cross-linked heat shrinkable materials
3.4.1 Heat-shrinkable waterproof caps (hereinafter referred to as waterproof caps), heat-shrinkable tube wraps (hereinafter referred to as patching strips) and heat-shrinkable patch sleeves (hereinafter referred to as patch sleeves) are collectively referred to as radiation cross-linked heat shrinkable materials.
3.4.2 Radiation cross-linked heat shrinkable materials consist of a base material and a primer. The base material is a polyethylene material that has been radiation cross-linked and has shrinkage: the primer is a rubber-type hot melt adhesive. The use temperature of radiation cross-linked heat shrinkable materials should not be greater than 70°C. When the use temperature is greater than 70°C, other materials can be used. 3. 4.4 The heat shrinkage ratio of radiation cross-linked heat shrinkable materials (after shrinkage: before shrinkage) should be less than 0.45.
Waterproof caps, patch tapes and patch sleeves should be selected according to the pipe diameter. The performance should comply with the provisions of Table 3.4.5.
Performance index of waterproof caps, patch tapes, patch sleeves No.
Tensile strength M[a]
Fracture length)
Softening point||Embrittlement
Environmental resistance Cracking time 0
Breakdown voltage MV
Volume medium resistivity·
Resistance to chemical media corrosion (7d%)
10\HCI
3%NaCI
21x 103
Test method
GBT 1040
GB/T 1040
GB/T 1633
GB/I ​​5470
GB/T 1842
GRT 1408
G8J410
Milk Appendix
SY2 T 4013-
Item:
Heat aging resistance (150℃.168h)
Tensile strength (M)
Breaking elongation (%)
Peel strength (Ncn)
Primered steel pipe
For polyethylene layer
"Indicators
Continued table 3.4.5
Test method
GHT 040
GH/T 1040
GB/T 2792
Note: Chemical medium corrosion resistance indicators: Retention rate of tensile strength and elongation after test 3.4.6
The thickness of the patch tape, patch and waterproof cap meets the requirements of 346. Thickness requirements for patching tape, patching sleeve and waterproof cap Date
Base material (mm)
Base material (mm)
3.5 Material acceptance
Filling deviation
Main raw materials such as polyethylene, polyisocyanate, polyether polyol, anti-corrosion coating and patching materials shall be accompanied by manufacturer, production date, quality certificate and certificate upon entering the factory. Otherwise, they shall not be accepted.
3.5.2 Barreled foam plastic raw materials shall be spot checked according to the provisions of Table 3.5.2. The test items and test indicators of polyisocyanate and aldehyde polyol shall comply with the provisions of Table 3.2.2 and Table 3.2.3.
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