Standard No.:	GB/T 41487-2022
English Name:	Composite sealing gasket material
Chinese Name:	复合型密封垫片材料
Chinese Classification:	Q69    Other non-metal mine product
Professional Classification:	GB    National Standard
ICS Classification:	23.040.80 23.040.80    Seals for pipe and hose assemblies 23.040.80
Source Content Issued by:	SAMR; SAC
Issued on:	2022-4-15
Implemented on:	2022-11-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	8000 words
Translation Price(USD):	240.0
Delivery:	via email in 1~3 business day

Composite sealing gasket material 1 Scope This document specifies the classification and marking of composite gasket materials, requirements, test methods, inspection rules and signs, packaging, transportation, storage. This document applies to the production of sealing gaskets of metal core material on both sides of the composite non-metallic materials (excluding materials containing asbestos components). This document does not apply to metal rubber sheet and metal core material multi-layer composite non-metallic materials. 2 Normative References The following documents constitute the essential provisions of this document through the normative references in the text. Among them, the date of the reference documents, only the date of the corresponding version applies to this document; undated reference documents. The latest version of the document (including all the revision sheets) is applicable to this document. GB/T 191 Package storage and transportation pictorial signs GB/T 540-2008 Test method for oil-resistant asbestos rubber sheet GB/T 6682 Analytical laboratory water specifications and test methods GB/T 8170 Numerical modification rules and limit values of the representation and determination GB/T 20671.1-2020 Classification system and test methods for non-metallic gasket materials Part 1: Classification system for non-metallic gasket materials GB/T 20671.3 Classification system and test method for non-metallic gasket materials Part 3: Test method for liquid resistance of gasket materials GB/T 30709 Test method for compressibility and resilience of laminated composite gasket materials GB/T 30710 Test method for creep relaxation rate of laminated composite gasket materials 3 Terms and Definitions There are no terms and definitions that need to be defined in this document. 4 Classification and Marking 4.1 Classification Composite gasket materials are divided into three categories according to the non-metallic materials they are compounded with: copying method non-asbestos metal composite sheet (CJ), rolling method non-asbestos metal composite sheet (GJ), and flexible graphite metal composite sheet (MJ). Non-asbestos metal composite sheet by copying method, non-asbestos metal composite sheet by rolling method and flexible graphite metal composite sheet are divided into two types of metal tooth plate composite sheet (C) and metal plate composite sheet (P) according to the composite form. 4.2 Marking Composite gasket material marking consists of product name, this document number, category, nominal thickness. Example. Copy method non-asbestos metal tooth sheet composite (CJC), thickness 1.0 mm. Marked as: composite gasket material GB/T XXXXX-CJC-1.0 5 Requirements 5.1 Appearance quality The surface of the composite gasket material should be flat and free from cracks, delamination, impurities, bubbles, scratches and other defects that affect the use. 5.2 Dimension and deviation 5.2.1 The length and width of the composite gasket material is ±5 mm according to the user's requirements. 5.2.2 The allowable deviation of the thickness of the composite plastic sealing gasket material shall conform to the provisions of Table 1. If the user has special requirements for thickness deviation, according to user requirements. Table 1 Allowable deviation of thickness Unit is millimeter

Composite sealing gasket material 1 Scope 2 Normative References 3 Terms and Definitions 4 Classification and Marking 5 Requirements 6 Test Methodology