GB/T 18998.3-2022Chlorinated poly(vinyl chloride) (PVC-C) piping systems for industrial applications - Part 3: Fittings (English PDF)

1 Scope

This document specifies the chlorinated polyvinyl chloride (PVC-C) resin as the main raw material, the industrial chlorinated polyvinyl chloride by injection molding (PVC-C) pipe fittings (hereinafter referred to as pipe fittings) terms and definitions, symbols, abbreviations, materials, product classification, requirements, system suitability, test methods laws, inspection rules and marking, packaging, transportation and storage.

This document, together with other parts of GB/T 18998, applies to industrial chlorinated polyvinyl chloride piping systems, including pressurized water supply and drainage

It is widely used in water treatment, petroleum, chemical industry, electric power, electronics, metallurgy, mining, shipbuilding, electroplating, papermaking, food, medicine and other fields of fluid transportation pipelines.

system.

Note 1.It is the responsibility of the purchaser to select this product appropriately according to the application needs of transporting flammable media and in combination with the relevant regulations, standards or specifications for fire and explosion protection.

Note 2.It is the responsibility of the purchaser to select the appropriate selection according to the application needs of transporting drinking water, food, and medicine, and in combination with the requirements of relevant laws, standards or specifications such as hygienic performance.

This product.

Note 3.The purchaser is responsible for the chemical resistance grades in Appendix B of GB/T 18998.1-2022 according to the application needs of transporting chemical media.

product.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 1033.1 Determination of Density of Plastic Non-foamed Plastics Part 1.Impregnation, Pycnometer and Titration

GB/T 2828.1 Counting Sampling Inspection Procedure Part 1.Lot-by-Lot Inspection Sampling Plan Retrieved by Acceptance Quality Limit (AQL)

GB/T 2918 Standard Environment for Conditioning and Testing of Plastic Specimens

GB/T 6111-2018 Determination of internal pressure resistance of thermoplastic piping systems for fluid transportation

GB/T 7139 Determination of chlorine content in plastic vinyl chloride homopolymers and copolymers

GB/T 7306 (all parts) 55° sealing pipe thread

GB/T 8802 Determination of Vicat softening temperature of thermoplastic pipes and fittings

GB/T 8803 Injection molding rigid polyvinyl chloride (PVC-U), chlorinated polyvinyl chloride (PVC-C), acrylonitrile-butadiene-styrene three

Test method for thermal oven test for ABS and acrylonitrile-styrene-acrylate terpolymer (ASA) pipe fittings

GB/T 8806 Measurement of the dimensions of plastic parts of plastic piping systems

GB/T 18998.1-2022 Industrial chlorinated polyvinyl chloride (PVC-C) piping systems - Part 1.General

GB/T 18998.2-2022 Industrial Chlorinated Polyvinyl Chloride (PVC-C) Piping Systems Part 2.Pipes

GB/T 18998.5-2022 Industrial chlorinated polyvinyl chloride (PVC-C) piping systems - Part 5.System suitability

GB/T 19278-2018 General terms and definitions for thermoplastic pipes, fittings and valves

GB/T 21300 Determination of Opacity of Plastic Pipes and Fittings

3 Terms and Definitions, Symbols, Abbreviations

Terms and definitions, symbols and abbreviations defined in GB/T 18998.1-2022 and GB/T 19278-2018 are applicable to this document. […]