GB/T 37263-2018Prefabricated directly buried insulating plastic-steel-plastic composite pipes with polyurethane [PUR]foamed-plastics and high density polyethylene [PE]casing pipes (English PDF)
高密度聚乙烯外护管聚氨酯发泡预制直埋保温钢塑复合管
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 28, 2018
Implementation date
November 1, 2019
Scope
GB/T 37263-2018 is the English-translated version of 高密度聚乙烯外护管聚氨酯发泡预制直埋保温钢塑复合管.
GB/T 37263-2018 covers prefabricated, directly buried insulated pipes made of a plastic-steel-plastic composite service pipe, rigid polyurethane foam insulation and a high-density polyethylene outer casing.
It sets out the terms and definitions, the product structure, the materials, the requirements, the test methods, the inspection rules, and marking, transport and storage, with a normative annex on testing the heat resistance of the insulation layer.
The methods it refers to include internal pressure resistance, thermal conductivity, foam density, open and closed cell content, oxygen permeability of barrier layers and thermal stability of polyethylene.
It applies to the manufacture and inspection of such pipes used in heating, cooling and domestic hot water systems. It was issued on 28 December 2018 and has applied since 1 November 2019.
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Document preview — GB/T 37263-2018
National Standard of the People's Republic of China
- ICS
- 91.140.10
- Classification
- P 46
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Product Structure
- 5 Material
- 6 Requirements
- 7 Test method
- 8 Inspection rules
- 9 Signs, transport and storage
- Appendix A (Normative) Test methods for heat resistance of insulation layers
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
1 Scope
This standard specifies the terms and definitions, product structure, and structure of high-density polyethylene outer tube polyurethane foam prefabricated direct-buried steel-plastic composite pipe. Materials, requirements, test methods, inspection rules, signs, transportation and storage.
This standard applies to high-density polyethylene outer tube polyurethane foam prefabricated direct buried insulation used in heating (cold) and domestic hot water delivery systems. Manufacture and inspection of steel-plastic composite pipes.
2 Normative 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 edition (including all amendments) applies to this document.
Plastics -- Determination of density of non-foam plastics -- Part 1. Dipping method, liquid pycnometer method and titration method
Standard environment for GB/T 2918 plastic sample conditioning and testing
GB/T 3524 carbon structural steel and low alloy structural steel hot rolled steel strip
GB/T 3682.1 Determination of melt mass flow rate (MFR) and melt volume flow rate (MVR) of plastics Part 1: Standard methods
GB/T 6111 Determination of internal pressure resistance of thermoplastic piping systems for fluid transport
GB/T 6343 Determination of apparent density of foams and rubber
GB/T 6671 Determination of the longitudinal retraction rate of thermoplastic pipes
GB/T 8804.3 Determination of tensile properties of thermoplastic pipes - Part 3
GB/T 8806 Plastic pipe system - Determination of dimensions of plastic parts
GB/T 8811 rigid foam plastic dimensional stability test method
GB/T 8813 Determination of compressive properties of rigid foams
GB/T 8923.1-2011 - Determination of surface cleanliness of steels - Part 1. Uncoated Corrosion grade and treatment grade of the steel surface and the surface of the steel after the original coating is completely removed
GB/T 10297 Determination of thermal conductivity of non-metallic solid materials - Hotline method
GB/T 10799 Determination of the percentage of open and closed cell volume of rigid foams
GB/T 15560 Hydraulic Pipeline for Hydraulic Fluid Instantaneous Blasting and Pressure Test Method
GB/T 17391 polyethylene pipe and pipe fittings thermal stability test method
GB/T 18475 Thermoplastic pressure pipes and fittings for material grading and naming overall use (design) factor
GB/T 28799.1 Heat-resistant polyethylene (PE-RT) piping systems for hot and cold water - Part 1: General
GB/T 29046 Urban heating prefabricated direct buried thermal insulation pipeline technical index detection method
QB/T 2803 Hard plastic pipe bending method
YB/T 5059 low carbon steel cold rolled steel strip
Determination of oxygen permeability of multi-layer pipe barriers in ISO 17455 plastics piping systems
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 2918Plastics -- Standard atmospheres for conditioning and testing
- GB/T 3524Hot-rolled carbon and low alloy structural steel strips
- GB/T 3682.1Plastics-Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics-Part 1:Standard method
- GB/T 6111Thermoplastics piping systems for the conveyance of fluids—Determination of the resistance to internal pressure
- GB/T 6343Cellular plastics and rubbers - Determination of apparent density
- GB/T 6671Thermoplastics pipes -- Determination of longitudinal reversion
GB/T 17391 · ISO 17455
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Related Standards
GB/T 10297-2015 — Test method for thermal conductivity of nonmetal solid materials - hot-wire method
GB/T 10799-2008 — Rigid cellular plastics - Determination of the volume percentage of open cells and of closed cells
GB/T 15560-1995 — Standard test method for short-time hydraulic failure and resistance to constant internal pressure of the plastics pipes for the transport of fluids
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