GB/T 45357-2025 Plastics piping systems on ships―Polyethylene（PE）pipes and fittings English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS 83.140.30; 47.020.30
CCS G 33
National Standards of the People's Republic of China
GB/T 45357-2025
Plastics piping systems on ships - Polyethylene (PE) pipes and fittings
船用塑料管道系统 聚乙烯(PE)管材及管件
(English Translation)
Issue date: 2025-02-28 Implementation date: 2025-09-01
Issued by the State Administration for Market Regulation
the Standardization Administration of the People's Republic of China
Contents
Forword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Materials
5 Pipe fittings classification
6 Requirements
7 Test method
8 Inspection rules
9 Marking, packaging, transportation and storage
Annex A (Normative) Allowable working pressures at different working temperatures
Annex B (Normative) External Load Test Methods
Annex C (Information) Schematic diagram of typical terminals of electrofusion pipe fittings
Bibliography
Plastics piping systems on ships - Polyethylene(PE) pipes and fittings
1 Scope
This document specifies the requirements of materials, classification of pipe fittings, specifications and dimensions, burst pressure and hydrostatic strength, physical and mechanical properties, system suitability, etc. of marine polyethylene (PE) pipes and fittings, describes the corresponding test methods, and specifies the inspection rules, marking, packaging, transportation and storage requirements.
This document is applicable to marine ballast water where the working temperature is not higher than 60 ℃ and the maximum working pressure (MOP) is not higher than 1.6 MPa
Non-important pipeline systems in tanks, open decks, tanks, empty tanks, pipe tunnels and pilot holes, including ballast water pipe systems, domestic water pipe systems and gray and black water pipe systems.
The piping system specified in this document is not suitable for places with fire resistance, smoke suppression and electrical conductivity requirements.
Note: It is the responsibility of relevant parties to properly select the products specified in this document according to specific application requirements and the requirements of relevant laws, standards and specifications
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, for the referenced document with a date, only the version corresponding to that date is applicable to this document; The latest version of the undated referenced document (including all amendments) is applicable to this document.
GB/T 1033.2 Plastics-Determination of density of unfoamed plastics - Part 2: Density gradient column method
GB/T 1034 Determination of water absorption of plastics
GB/T 1040.2 Determination of tensile properties of plastics - Part 2: Test conditions for molded and extruded plastics
GB/T 1633 Determination of Vicat softening temperature (VST) of thermoplastics
GB/T 1634.2 Plastics-Determination of deformation temperature under load - Part 2: Plastics and hard rubber
GB/T 2828.1 Counting sampling inspection procedures - Part 1: Batch-by-batch inspection sampling plan retrieved by acceptance quality limit (AQL)
GB/T 2918 Standard environment for conditioning and testing of plastic specimen
GB/T 3682.1 Plastics-Thermoplastics-Determination of melt mass flow rate (MFR) and melt volume flow rate (MVR) - Part 1: Standard method
GB/T 4217 Nominal outer diameter and nominal pressure of thermoplastic tubing for fluid transfer
GB/T 6111 Determination of internal pressure resistance of thermoplastic piping systems for fluid transport
3 Terms and definitions
The terms and definitions defined in GB/T 19278 and GB/T 13663.1 and the following apply to this document.
3.1
flame spread
speed at which the flame travels along the surface when a marine plastic pipe is burned
Note: Using the method of ASTM D635 to determine, the materials on ships are generally low flame seeding.
4 Material
4.1 Polyethylene mixing ingredients
4.1.1 General requirements
The materials used to produce pipes and fittings should be PE100 or higher grade polyethylene mixture.
Polyethylene mixture shall comply with the requirements of GB/T 13663.1.
4.1.2 Color of polyethylene mixture
The color of the mixed ingredients should be black.
4.1.3 Performance of polyethylene mixture
The properties of polyethylene mixture shall comply with the requirements of Table 2 and Table 3
4.1.4 Welding compatibility of polyethylene mixture
The welding compatibility of polyethylene mixture shall comply with the requirements of GB/T 13663.1.
4.2 Recycled materials
Recycled materials and recycled materials should not be used in the production of pipes and fittings.
4.3 Mixed ingredients for labeling color bars
The polyethylene mixture used to manufacture pipe color strips should adopt the same base resin as the polyethylene mixture used to produce pipes, or have the same MRS value. The polyethylene mixture used to mark color strips should not have a negative impact on the performance of pipes.
The marking color strip shall meet the butt welding tensile strength test requirements in Table 2.
4.4 Metal parts
The metal parts of pipe fittings should not cause degradation or aging of plastic pipe materials during pipeline use, and all corrosive parts should be fully protected.
When different metal materials are used in pipe fittings and may come into contact with moisture, measures should be taken to prevent electrochemical corrosion.
4.5 Other materials
If grease or lubricant is used, it should not penetrate into the welding area and should not negatively affect the material properties of pipes/fittings.
5 Pipe fittings classification
5.1 The pipe fitting types include the following 3 types:
——Welded connection pipe fittings;
——Mechanical connection pipe fittings (dn≤ 63 mm);
——Flange connection pipe fittings.
5.2 Fusion connection pipe fittings are divided into electrofusion pipe fittings, hot-melt bucking pipe fittings and hot-melt socket pipe fittings.
