GB/T 45357-2025 English PDF

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GB/T 45357-2025: Plastics piping systems on ships - Polyethylene (PE) pipes and fittings
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 45357-2025	919	Add to Cart	7 days	Plastics piping systems on ships - Polyethylene (PE) pipes and fittings	Valid

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Basic data

Standard ID: GB/T 45357-2025 (GB/T45357-2025)
Description (Translated English): Plastics piping systems on ships - Polyethylene (PE) pipes and fittings
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G33
Classification of International Standard: 83.140.30; 47.020.30
Word Count Estimation: 46,492
Date of Issue: 2025-02-28
Date of Implementation: 2025-09-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 45357-2025: Plastics piping systems on ships - Polyethylene (PE) pipes and fittings

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
GB/T 45357-2025 English version. Plastics piping systems on ships - Polyethylene (PE) pipes and fittings ICS 83.140.30;47.020.30 CCSG33 National Standard of the People's Republic of China Marine plastic piping system polyethylene (PE) pipes And pipe fittings Released on 2025-02-28 2025-09-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 2 4 Materials 2 5 Pipe fittings classification 4 6 Requirements 5 7 Test methods 23 8 Inspection Rules 27 9 Marking, packaging, transportation and storage 32 Appendix A (Normative) Allowable working pressure at different working temperatures 34 Appendix B (Normative) External load test method 35 Appendix C (Informative) Schematic diagram of typical terminal of electric fusion pipe fittings 36 Reference 38

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by China Light Industry Federation. This document is under the jurisdiction of the National Technical Committee for Standardization of Plastic Products (SAC/TC48). This document was drafted by. Zhejiang Weixing New Building Materials Co., Ltd., Jiangsu Xinghe Group Co., Ltd., Taizhou Product Quality Supervision Inspection Institute, Gongyuan Co., Ltd., Guangdong Liansu Technology Industry Co., Ltd., Shandong Shengbang Plastic Co., Ltd., Fujian Yatong New Materials Technology Co., Ltd., Rifeng New Materials Co., Ltd., Yada Plastic Products Co., Ltd., Wuzhou Product Quality Inspection Institute, SABIC (China) Research Institute Co., Ltd., China Shipbuilding and Ocean Engineering Design and Research Institute, Beijing Technology and Business University, and Jingjiang Haihong Plastic Technology Co., Ltd. The main drafters of this document are. Zhang Weijiao, Kuang Hongwei, Dou Qingwei, Huang Jian, Yu Hualin, Jing Faqi, Chen Xiaomei, Lv Ailong, Li Yu, Xiao Zhaohua, Feng Dan, Yang Yong, Xiang Aimin, Bao Haichu, Zhang Zuoyuan.

Introduction

As a mobile structure at sea, ships have high requirements for the reliability and safety of their piping systems. International Maritime Organization IMOA.753(18) The Guidelines for the Application of Plastic Pipes on Board Ships and the Maritime Safety Committee Resolution IMOMSC.313(88) on the Guidelines for the Application of Plastic Pipes on Board Ships The Amendment provides systematic guidance on the design and selection of marine plastic piping systems and becomes the basic standard for classification societies to conduct product certification. However, due to the application location of shipboard pipelines, the medium they transport, and the role or potential impact on the safe operation of ships, there are Therefore, in order to meet the special needs of marine pipelines, the plastic pipes are used to Advantages, it is necessary to correctly select plastic pipes according to product characteristics, working environment and application conditions in accordance with this document. Whether a piping system is “important” depends on the medium it transports, the operating conditions and the location on board where it is installed. "System" refers to those pipeline systems that will not contribute to other accidents and cause greater disasters when they are damaged, and are not easily affected by other accidents. Polyethylene piping systems in other places with special requirements other than fire resistance and conductivity, such as ballast piping systems and domestic hot and cold water piping systems. The above restrictions on polyethylene pipe systems are mainly due to the fact that polyethylene materials themselves do not have the fire resistance, smoke suppression and conductivity required by IMOA.753. The polyethylene pipes and fittings specified in this document are allowed to be laminated, coated or otherwise protected according to IMOA.753. Plastic pipes are used to protect the pipes, so that the pipes installed on site meet the requirements of fire resistance, smoke suppression, conductivity, etc., but these measures can have different materials It is difficult to form a unified product standard for the time being. This document does not involve these protection contents. Some of the performance indicators of polyethylene pipes and fittings specified in this document have a certain correspondence with the indicators specified in IMOA.753. However, due to different terms and conventions, the Chinese and English versions of these indicators do not strictly correspond to each other. Table 1 lists their correspondence. Table 1 Comparison of some indicators in this document and IMOA.753(18) in Chinese and English This document is IMOA.753(18) Internalpressure External pressure resistance Tensile yield stress Vicat softening temperature Distortion temperature Chemical resistance Horizontal combustion (flame spread) Flamespread Although the purpose of this document is to evaluate polyethylene pipes and fittings for marine use, production and inspection according to this document are The test cannot replace other certification projects carried out by classification societies in accordance with their industry specifications and actual needs. The publication of this document may lead to the formation of other marine plastic pipe product standards in the future. Marine plastic piping system polyethylene (PE) pipes and pipe fittings

1 Scope

This document specifies the materials, classification, size, bursting pressure and hydrostatic strength of marine polyethylene (PE) pipes and fittings. The requirements for physical and mechanical properties, system applicability, etc. are described, and the corresponding test methods are specified, as well as the inspection rules, marking, packaging, transportation and storage. Require. This document is applicable to the working temperature not higher than 60℃, the maximum working pressure (MOP) not greater than 1.6MPa, and installed in the ship's ballast water Non-important piping systems in tanks, open decks, tanks, empty spaces, tunnels and guide holes, including ballast water piping systems, domestic water piping systems and grey and black water piping systems. The piping system specified in this document is not suitable for places with requirements such as fire resistance, smoke suppression and conductivity. Note. It is the responsibility of the relevant parties to appropriately select the products specified in this document based on specific application requirements in combination with relevant laws, regulations, standards and specifications.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 1033.2 Plastics - Determination of density of non-cellular 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 moulding and extruded plastics GB/T 1633 Determination of Vicat softening temperature (VST) of thermoplastics GB/T 1634.2 Determination of deflection temperature of plastics under load Part 2.Plastics and hard rubber GB/T 2828.1 Sampling procedures for inspection by attributes Part 1.Sampling plans for batch inspection based on the acceptance quality limit (AQL) GB/T 2918 Standard environment for conditioning and testing of plastic specimens GB/T 3682.1 Plastics - Determination of melt mass flow rate (MFR) and melt volume flow rate (MVR) of thermoplastics Part 1.Standard methods GB/T 4217 Nominal outer diameter and nominal pressure of thermoplastic pipes for fluid transportation GB/T 6111 Determination of the resistance to internal pressure of thermoplastic piping systems for fluid transportation GB/T 6671 Determination of longitudinal shrinkage of thermoplastic pipes GB/T 7306.1 55° sealing pipe thread Part 1.Cylindrical internal thread and conical external thread GB/T 7306.2 55° sealing pipe thread Part 2.Conical internal thread and conical external thread GB/T 8163 Seamless steel pipe for conveying fluids GB/T 8802 Determination of Vicat softening temperature of thermoplastic pipes and fittings GB/T 8804.3 Determination of tensile properties of thermoplastic pipes Part 3.Polyolefin pipes GB/T 8806 Determination of dimensions of plastic parts for plastic piping systems GB/T 9345.1 Determination of ash content in plastics Part 1.General method GB/T 9647 Determination of ring stiffness of thermoplastic pipes GB/T 10798 Common wall thickness table for thermoplastic pipes GB/T 13021 Polyethylene pipes and fittings - Determination of carbon black content - Calcination and pyrolysis method GB/T 13663.1-2017 Polyethylene (PE) piping systems for water supply Part 1.General ......

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