PE pipe execution standards — did you choose the right one?

PE Pipe - Commonly Used Chinese Execution Standards (Current)

1. PE water supply pipes (solid-wall) — GB/T 13663 Polyethylene (PE) piping systems for water supply

GB/T 13663.1-2017 General rules

GB/T 13663.2-2018 Pipes (most commonly used)

GB/T 13663.3-2018 Fittings

GB/T 13663.5-2018 System fitness for purpose

Application: cold water supply ≤40 ℃, PE80 / PE100 materials

2. PE gas pipes — GB/T 15558 Buried polyethylene (PE) piping systems for gas (new edition 2023)

GB/T 15558.1-2023 General rules

GB/T 15558.2-2023 Pipes

GB/T 15558.3-2023 Fittings

GB/T 15558.4-2023 Valves

Buried municipal gas, PE80 / PE100; safety requirements are higher than for water supply pipes

3. PE structured-wall drainage pipes (buried sewage)

GB/T 19472.1-2019 Buried double-wall corrugated PE pipes

GB/T 19472.2-2019 Buried spirally-wound structured-wall PE pipes (Krahl pipes)

4. Industry-specific PE pipe standards

CJ/T 358-2019 Polyethylene pipes for trenchless engineering (directional drilling, pipe jacking, incl. PE100-RC crack-resistant grades)

CJ/T 250 Polyethylene steel-plastic spirally-wound drainage pipes

5. Supporting national standards for fusion jointing / testing

GB/T 20674 Plastics pipes and fittings — PE fusion jointing equipment (electrofusion / butt-fusion welding machine standard)

GB/T 18252 Plastics piping systems — long-term hydrostatic strength test

GB/T 18475 Classification of PE compounds (PE80 / PE100 / PE100-RC)

6. Commonly used international standards (export trade)

ISO 4427: PE piping systems for water supply

ISO 4437: Buried PE piping systems for gas

DVS 2205, DVS 2207 (German PE pipe design and butt-fusion welding specifications, frequently referenced in domestic projects)

7. Current Chinese National Standard: GB/T 28799 Polyethylene of Raised Temperature Resistance (PE-RT) piping systems for hot and cold water

GB/T 28799.1-2020 General rules

GB/T 28799.2-2020 Pipes (most critical — must be stated on certificates and test reports)

GB/T 28799.3-2020 Fittings

GB/T 28799.4-2024 Valves (effective 2024-10-01)

Divided into PE-RT Type I (commonly used for floor heating, long-term 70 ℃) and PE-RT Type II (high-temperature resistant, usable in secondary networks of central heating)

8. International standards (for export)

ISO 22391 PE-RT piping systems for hot and cold water (corresponding to GB/T 28799)

PE siphonic drainage pipes (HDPE siphonic rainwater pipes) — applicable standards

CJ/T 250-2018 High-density polyethylene (HDPE) pipes and fittings for building drainage

Siphonic systems must use pipes marked BD, capable of withstanding negative pressure and passing vacuum tests (-0.08 MPa),

Mainly PE100 material, S12.5 pipe series.

10. International standards (in-building soil and waste drainage)

ISO 8770 Polyethylene piping systems for soil and waste discharge inside buildings (corresponding to CJ/T 250)

Note:

Ordinary buried sewage PE pipes to GB/T 19472 (double-wall corrugated pipes) cannot be substituted; double-wall corrugated pipes cannot withstand negative pressure and must not be used for siphonic drainage.

PE water supply pipes to GB/T 13663 cannot be substituted either, since water supply pipes are not tested for negative-pressure vacuum performance.

Jointing method: butt fusion / electrofusion jointing; the system must be fully sealed.