1 Scope
This standard stipulates the minimum technical requirements for steel pipe extrusion polyethylene coating and radiation cross-linked polyethylene heat shrink tape (sets).
This standard applies to the design, production and inspection of buried steel pipelines and extruded polyethylene coating, as well as the design, construction and inspection of on-site filling ports. Other laying pipelines can be implemented by reference to the extrusion polyethylene coating.
Extruded polyethylene coatings can be classified into normal temperature type (N) where the maximum design temperature does not exceed 60°C and high temperature type (H) whose maximum design temperature does not exceed 80°C.
2 Annex References
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest version (including all amendments) applies to this document.
GB/T 1040.2 Plastics - Determination of Tensile Properties - Part 2: Test Conditions for Moulded and Extruded Plastics
GB/T 1408.1 Test Method for Electrical Strength of Insulating Materials Part 1: Test at Frequency
GB/T 1410 Test Method for Volume Resistivity and Surface Resistivity of Solid Insulating Materials
GB/T 1633 Determination of Vicat Softening Temperature (VST) of Thermoplastics
GB/T 1725 Paints, Varnishes and Plastics Determination of Non-volatile Content
GB/T 1842 Plastics Polyethylene Environmental Stress Cracking Test Method
GB/T 3682 Determination of Mass Flow Rate and Melt Volume Flow Rate of Thermoplastic Melt
GB/T 4472 Determination of Density and Relative Density of Chemical Products
GB/T 5470 Determination of Embrittlement Temperature of Plastic Impact Methods
GB 6514 Safety Regulations for Coating Operations Safety and Ventilation of Painting Process
GB/T 6554 Resin-Based Reactive Composites for Electrical Insulation - Part 2: Test Methods - Powder Coating Method for Electrical Use
GB/T 7124 Adhesives Determination of Tensile Shear Strength (Rigid Materials for Rigid Materials)
GB 7692 Coating Operation Safety Regulations Pre-Painting Process Safety and Ventilation Purification
GB/T 8923.1 Surface Treatment of Steel before Coating Application Visual Assessment of Surface Cleanliness. Part 1: Corrosion Grade and Treatment Level of Uncoated Steel Surface and Steel Surface after Full Removal of The Original Coating
GB/T 13021 Determination of Carbon Black Content in Polyethylene Pipes and Fittings (Thermal Weight Loss Method)
GB/T 15332 Determination of Softening Point of Hot Melt Adhesives
GB/T 18570.3 Surface Treatment of Steel Substrates before Application of Paints Assessment of Surface Cleanliness Tests Part 3: Assessment of Dust on steel surfaces before application of paints (pressure sensitive adhesive tape method)
Forward i
1 Scope
2 Annex References
3 Terms and Definitions
4 Coating Structure
5 Materials
5.1 Steel Pipe
5.2 Anti-corrosion Material
5.3 Process Evaluation Test
6 Anti-corrosion Coating
7 Quality Inspection
8 Signs, Stacking and Handling
9 Repair Mouth and Injury
9.1 Filling Materials
9.2 Preparation for Construction
9.3 Filling Construction
9.4 Quality Inspection
9.5 Injuries
10 Back Ditch Backfill
11 Safety, Hygiene and Environmental Protection
12 Delivery Documents
Annex A (Annex) Epoxy Powder Curing Time Test Method
Annex B (Annex) Test Method for Thermal Properties of Epoxy Powder and Its Coating
Annex C (Annex) Coating Adhesion Method
Annex D (Annex) Anticorrosion Layer Cathode Peel Test Method
Annex E (Annex) Coating Anti-Bending Test Method
Annex F (Annex) Oxidation Induction Method
Annex G (Annex) Plastic Moisture Content Determination Test Method
Annex H (Annex) Indentation Hardness Test Method
Annex I (Annex) Polyethylene Resistant Chemical Medium Corrosion Test Method
Annex J (Annex ) Polyethylene UV Aging Resistance Test Method
Annex K (Annex Annex) Coating Peel Strength Measurement Method
Annex L (Annex ) Anticorrosion Layer Impact Strength Test Method
Annex M (Annex ) Polyethylene Anticorrosion Layer Hot Water Immersion Test Method
Annex N (Annex) Method for Thermal impact Test of Heat Shrinkable Tape (Sleeve)
Annex P (Annex) Heat Preservation Water Soak Test Method
Annex Q (Annex) Method for Thermal Aging Test of Filler Coating
Standard
GB/T 23257-2017 Polyethylene coating for buried steel pipeline (English Version)
1 Scope
This standard stipulates the minimum technical requirements for steel pipe extrusion polyethylene coating and radiation cross-linked polyethylene heat shrink tape (sets).
This standard applies to the design, production and inspection of buried steel pipelines and extruded polyethylene coating, as well as the design, construction and inspection of on-site filling ports. Other laying pipelines can be implemented by reference to the extrusion polyethylene coating.
Extruded polyethylene coatings can be classified into normal temperature type (N) where the maximum design temperature does not exceed 60°C and high temperature type (H) whose maximum design temperature does not exceed 80°C.
2 Annex References
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest version (including all amendments) applies to this document.
GB/T 1040.2 Plastics - Determination of Tensile Properties - Part 2: Test Conditions for Moulded and Extruded Plastics
GB/T 1408.1 Test Method for Electrical Strength of Insulating Materials Part 1: Test at Frequency
GB/T 1410 Test Method for Volume Resistivity and Surface Resistivity of Solid Insulating Materials
GB/T 1633 Determination of Vicat Softening Temperature (VST) of Thermoplastics
GB/T 1725 Paints, Varnishes and Plastics Determination of Non-volatile Content
GB/T 1842 Plastics Polyethylene Environmental Stress Cracking Test Method
GB/T 3682 Determination of Mass Flow Rate and Melt Volume Flow Rate of Thermoplastic Melt
GB/T 4472 Determination of Density and Relative Density of Chemical Products
GB/T 5470 Determination of Embrittlement Temperature of Plastic Impact Methods
GB 6514 Safety Regulations for Coating Operations Safety and Ventilation of Painting Process
GB/T 6554 Resin-Based Reactive Composites for Electrical Insulation - Part 2: Test Methods - Powder Coating Method for Electrical Use
GB/T 7124 Adhesives Determination of Tensile Shear Strength (Rigid Materials for Rigid Materials)
GB 7692 Coating Operation Safety Regulations Pre-Painting Process Safety and Ventilation Purification
GB/T 8923.1 Surface Treatment of Steel before Coating Application Visual Assessment of Surface Cleanliness. Part 1: Corrosion Grade and Treatment Level of Uncoated Steel Surface and Steel Surface after Full Removal of The Original Coating
GB/T 13021 Determination of Carbon Black Content in Polyethylene Pipes and Fittings (Thermal Weight Loss Method)
GB/T 15332 Determination of Softening Point of Hot Melt Adhesives
GB/T 18570.3 Surface Treatment of Steel Substrates before Application of Paints Assessment of Surface Cleanliness Tests Part 3: Assessment of Dust on steel surfaces before application of paints (pressure sensitive adhesive tape method)
Contents of GB/T 23257-2017
Forward i
1 Scope
2 Annex References
3 Terms and Definitions
4 Coating Structure
5 Materials
5.1 Steel Pipe
5.2 Anti-corrosion Material
5.3 Process Evaluation Test
6 Anti-corrosion Coating
7 Quality Inspection
8 Signs, Stacking and Handling
9 Repair Mouth and Injury
9.1 Filling Materials
9.2 Preparation for Construction
9.3 Filling Construction
9.4 Quality Inspection
9.5 Injuries
10 Back Ditch Backfill
11 Safety, Hygiene and Environmental Protection
12 Delivery Documents
Annex A (Annex) Epoxy Powder Curing Time Test Method
Annex B (Annex) Test Method for Thermal Properties of Epoxy Powder and Its Coating
Annex C (Annex) Coating Adhesion Method
Annex D (Annex) Anticorrosion Layer Cathode Peel Test Method
Annex E (Annex) Coating Anti-Bending Test Method
Annex F (Annex) Oxidation Induction Method
Annex G (Annex) Plastic Moisture Content Determination Test Method
Annex H (Annex) Indentation Hardness Test Method
Annex I (Annex) Polyethylene Resistant Chemical Medium Corrosion Test Method
Annex J (Annex ) Polyethylene UV Aging Resistance Test Method
Annex K (Annex Annex) Coating Peel Strength Measurement Method
Annex L (Annex ) Anticorrosion Layer Impact Strength Test Method
Annex M (Annex ) Polyethylene Anticorrosion Layer Hot Water Immersion Test Method
Annex N (Annex) Method for Thermal impact Test of Heat Shrinkable Tape (Sleeve)
Annex P (Annex) Heat Preservation Water Soak Test Method
Annex Q (Annex) Method for Thermal Aging Test of Filler Coating
