GB/T 18993.1-2020Chlorinated Polyvinyl Chloride (PVC-C) Piping System for Hot and Cold Water - Part 1: General (English PDF)

Foreword

GB/T 18993 "Chlorinated Polyvinyl Chloride (PVC-C) Piping System for Hot and Cold Water" is divided into 5 parts.

---Part 1.General Provisions;

---Part 2.Pipes;

---Part 3.Pipe fittings;

---Part 4.Valve;

---Part 5.System applicability.

This part is Part 1 of GB/T 18993.

This section was drafted in accordance with the rules given in GB/T 1.1-2009.

This Part replaces GB/T 18993.1-2003 "Chlorinated Polyvinyl Chloride (PVC-C) Piping System for Cold and Hot Water Part 1.General Rules",

Compared with GB/T 18993.1-2003, the main technical changes are as follows.

---Modified the scope (see Chapter 1, Chapter 1 of the.2003 edition);

---Modified terms and definitions, symbols, and abbreviations (see Chapter 3, Chapter 3 of the.2003 edition);

---Modified the requirements of mixed ingredients (see 5.1, 5.2, 5.4 of the.2003 edition);

---Modified the requirements for the chlorine content of the chlorinated polyvinyl chloride (PVC-C) resin compound, and the chlorinated polychloride used in the production of pipes and fittings

Requirements for the chlorine content of ethylene (PVC-C) compounds (see 5.3, 5.2 in the.2003 edition);

---Deleted the material recycling regulations (see 5.3 of the.2003 edition);

---Adjust Appendix A of the.2003 edition to Appendix C (see Appendix C);

---Added a normative appendix "Verification test method of chlorinated polyvinyl chloride (PVC-C) material failure temperature Tmal" (see

Appendix D).

This part uses the redrafting method to amend and adopt ISO 15877-1.2009 "Plastic Piping System for Cold and Hot Water Chlorinated Polyvinyl Chloride

(PVC-C) Part 1.General Provisions.

Compared with ISO 15877-1.2009, this part has more structural adjustments. Appendix A lists this part and ISO 15877-

1 Scope

This part of GB/T 18993 specifies the terms and definitions, symbols and abbreviations of chlorinated polyvinyl chloride (PVC-C) piping systems for cold and hot water

Language, use condition level, material and hygiene requirements.

This part and other parts of GB/T 18993 are applicable to chlorinated polyvinyl chloride (PVC-C) piping systems for building hot and cold water.

Note 1.The purchaser has the responsibility to select this product appropriately according to its specific application requirements, combined with relevant regulations, standards or specifications.

Note 2.For the connection of chlorinated polyvinyl chloride pipes and fittings for cold and hot water, and the connection of chlorinated polyvinyl chloride pipes and fittings with other plastic or non-plastic parts

For information about the connection, please refer to relevant parts of GB/T 18993 and other standard documents.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document.

For undated references, the latest version (including all amendments) applies to this document.

GB/T 2918 Standard environment for condition adjustment and testing of plastic specimens (GB/T 2918-2018, ISO 291.2008, MOD)

GB/T 7139 Plastic Vinyl Chloride Homopolymer and Copolymer Determination of Chlorine Content (GB/T 7139-2002, eqvISO 1158.1998)

GB/T 17219 Safety evaluation standard for drinking water distribution equipment and protective materials

GB/T 18252 Plastic piping systems use extrapolation to determine the long-term hydrostatic strength of thermoplastic materials in the form of pipes

(GB/T 18252-2020, ISO 9080.2012, IDT)

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

3 Terms and definitions, symbols, abbreviations