GB 41317-2024 PDF English
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GB 41317: Historical versions
| Standard ID | USD | BUY PDF | Delivery | Standard Title (Description) | Status |
| GB 41317-2024 | 380 | Add to Cart | Auto, 9 seconds. | Stainless steel corrugated tubes for the connection of gas appliances | Valid |
| GB/T 41317-2022 | 305 | Add to Cart | Auto, 9 seconds. | Stainless steel corrugated tubes for the connection of gas appliances | Obsolete |
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GB 41317-2024: Stainless steel corrugated tubes for the connection of gas appliances
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB41317-2024GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 91.140 CCS P 45 Replacing GB/T 41317-2022 Stainless steel corrugated tubes for the connection of gas appliances Issued on: APRIL 29, 2024 Implemented on: AUGUST 01, 2024 Issued by. State Administration for Market Regulation; National Standardization Administration.
Table of Contents
Foreword... 4 1 Scope... 6 2 Normative references... 6 3 Terms and definitions... 7 4 Classification, specifications, models... 8 4.1 Classification... 8 4.2 Specifications... 9 4.3 Model number... 9 5 Materials, appearance, structure, dimensions... 10 5.1 Materials... 10 5.2 Appearance... 10 5.3 Structure and dimensions... 11 6 Performance requirements... 12 7 Test methods... 14 7.1 Test conditions... 14 7.2 Test instruments and equipment... 14 7.3 Corrugated hose performance test... 14 7.4 Protecting coat performance test... 21 7.5 Joint performance test... 23 7.6 Flame resistance test of sealing gasket... 25 8 Inspection rules... 25 8.1 Exit-factory inspection... 25 8.2 Type inspection... 27 9 Marking and installation manual... 28 9.1 Marking... 28 9.2 Installation and operation manual... 29 10 Packaging, transportation, storage... 29 10.1 Packaging... 29 10.2 Transportation... 29 Stainless steel corrugated tubes for the connection of gas appliances1 Scope
This document specifies the classification, specifications and models of stainless steel corrugated hoses for connecting gas appliances; their materials, appearance, structure and dimensions; performance requirements; test methods; inspection rules; marking and installation and operation instructions; packaging, transportation, storage. This document applies to stainless steel corrugated hoses used for connecting gas- burning appliances or gas equipment, with a nominal size not exceeding DN32 and a maximum working pressure of 0.01 MPa, for conveying town gas. This document does not apply to stainless steel corrugated hoses used for connecting media containing dimethyl ether.2 Normative references
The following documents, through normative references in the text, constitute essential provisions of this document. For dated references, only the edition cited applies; for undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 191 Packaging - Pictorial marking for handling of goods GB/T 196 General purpose metric screw threads - Basic dimensions GB/T 1220 Stainless steel bars GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1.Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection GB/T 3280 Cold rolled stainless steel plate, sheet and strip GB/T 4240 Stainless steel wires GB/T 5231 Designation and chemical composition of wrought copper and copper alloys GB/T 7306.1 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads - Part 1.Parallel internal and taper external threads GB/T 7306.2 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads - Part 2.Taper internal and external threads GB/T 7307 Pipe threads with 55 degree thread angle where pressure-tight joints are not made on the threads GB/T 8815 Plasticized polyvinyl chloride (PVC) compounds for wire and cable GB/T 9576 Rubber and plastics hoses and hose assemblies - Guidelines for selection, storage, use and maintenance GB/T 9577 Rubber and plastics hose and hose assemblies - Rules for marking, package and transportation GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests GB/T 13657 Bisphenol-A epoxy resin GB/T 15065 Black polyethylene compounds for wire and cable GB/T 23658 Elastomeric seals - Material requirement for seals used in pipes and fittings carrying gaseous fuels and hydrocarbon fluid3 Terms and definitions
The following terms and definitions apply to this document. 3.1 Stainless steel corrugated tubes for the connection of gas appliances A stainless steel corrugated hose with a fixed length and a coating, having connecting joints at both ends. Note. Abbreviated as "corrugated hose". 3.2 Tubular blank A stainless steel tube with longitudinal welds or seamless sections used for manufacturing corrugated tubes. 3.3 Corrugated tube A tubular shell with corrugated busbars. 3.4 Protecting coat A protective coating used to protect stainless steel corrugated tubes.4 Classification, specifications, models
4.1 Classification 4.1.1 Corrugated hoses are classified according to connection characteristics as follows. a) Ordinary corrugated hose. Used only for connecting gas pipelines to stationary gas appliances or equipment, designated RLB; b) Ultra-flexible corrugated hose. Can be used to connect gas pipelines or bottled liquefied petroleum gas regulators to gas appliances or equipment, designated CRLB. 4.1.2 Corrugated hoses are classified according to application as follows. a) Corrugated hose for gas meter connection. designated B; b) Corrugated hose for connecting gas appliances or equipment other than gas meters. designated A. 4.1.3 Corrugated hoses are classified according to the shape of the corrugations as follows. a) Spiral corrugated hose. The corrugations are spiral-shaped, designated L; b) Annular corrugated hose. The corrugations are closed circular rings, designated H. 4.1.4 Corrugated hoses are classified according to the connection method of both ends as follows. a) Threaded connection corrugated hose. The corrugated hose with threaded connections at both ends, designated S, see Figure 1 for an example;5 Materials, appearance, structure, dimensions
5.1 Materials The material of the corrugated hose shall conform to the specifications in Table 1 or be other materials with equivalent or higher performance. 5.2 Appearance 5.2.1 The inner and outer surfaces of the connector shall be free of cracks and pinholes. 5.2.2 The sealing gasket shall have a regular appearance, free from cracks and burrs. 5.2.3 The protecting coat of the corrugated hose shall be yellow; the surface shall be free from scratches, discoloration, cracks. 5.3 Structure and dimensions 5.3.1 The protecting coat shall completely cover the corrugated portion of the hose. 5.3.2 The wall thickness of the tube blank shall meet the following requirements. a) The wall thickness of the tube blank for ordinary corrugated hoses shall not be less than 0.20 mm; b) The wall thickness of the tube blank for ultra-flexible corrugated hoses shall not be less than 0.12 mm. 5.3.3 The wall thickness of the joint shall meet the following requirements. a) When the raw material is leaded brass, the wall thickness of the joint shall not be less than 1.5 mm; b) When the raw material is stainless steel, the wall thickness of the joint shall not be less than 1.0 mm. 5.3.4 The thread of the connector shall meet the following requirements. a) When a gasket is used for sealing, the connector thread shall conform to the provisions of GB/T 7307 or GB/T 196; the thread engagement length shall not be less than 4 times the pitch length; b) When a threaded seal is used, the connector thread shall conform to the provisions of GB/T 7306.1 or GB/T 7306.2. 5.3.5 The length tolerance of the corrugated hose shall conform to the provisions of Table 2; the total length shall not exceed 2000 mm. 5.3.6 The minimum inner diameter of the corrugated hose shall conform to the provisions of Table 3. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
