GB/T 37997-2019 (English Version) PDF

Scope: This standard specifies eight types of multi-layer thermoplastics (multi-layer thermoplastics) for transporting hydrocarbons, solvents and chemicals with a nominal inner diameter of 25mm-300mm, a working pressure of 0.4MPa-2.5MPa and an operating temperature range of -30C-150'C. Requirements for non-vulcanized) hoses and hose assemblies. Type 1 hose is suitable for transporting gas; Type 2 to Type 8 hose is suitable for transporting liquids. Note 1: Refer to Appendix A for the selection of polymer materials for the inner lining and coating of the inner spiral wire related to chemicals transported by hoses and/or hose assemblies. Note 2: When considering the use of polymer-coated inner wire hoses for transporting hydrocarbons and chemicals with low conductivity, it is best to consult the manufacturer. This standard does not apply to hoses and hose assemblies used for the following purposes: 　——aircraft refueling (see GB/T10543); 　——luxury oil distribution (see HG/T3037) - petroleum burners (see GB/T24146 ); 　——Liquefied petroleum gas and liquefied natural gas (see ISO27127); 　——Fire protection (see GB/T24144); 　——Offshore liquefied natural gas (see EN1474-2) 3 - Refrigeration pipelines.

GB/T 37997-2019 history

2019 GB/T 37997-2019 Thermoplastic multi-layer (non-vulcanized) hoses and hose assemblies for the transfer of hydrocarbons, solvents and chemicals—Specification