CJ/T 463-2014 in English
VALIDLight gauge stainless steel for press-fittings
- Issued on:2014-09-29
- Implemented on:2015-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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本标准规定了薄壁不锈钢承插压合式管件的术语和定义、分类和标记、结构和基本尺寸、材料、要求、试验方法、检验规则、标志、包装、运输和贮存。
本标准适用于输气压力不大于0.8 MPa户内燃气薄壁不锈钢承插压合式管件的设计、制造和检验。输水压力不大于3.0 MPa的建筑冷热水薄壁不锈钢承插压合式管件可参照执行。
Introduction
Standard Overview
CJ/T 463-2014 specifies the technical requirements and test methods for thin-wall stainless steel socket-and-spigot compression fittings, which are applicable to gas systems with a working pressure of ≤0.8MPa and water supply systems with a working pressure of ≤3.0MPa.
Core technical requirements
| Project | Requirements for gas | Requirements for water |
|---|---|---|
| Material | S30408/S31608 series | S30403/S31603 series |
| Wall thickness deviation | ±0.15mm | ±0.10mm |
| Salt spray test | 240h no corrosion | |
| Hydraulic pressure test | 4.5MPa no leakage | |
Typical pipe fitting types
90° elbow: 12 specifications from DN15 to DN200, the difference between A and B type structures is mainly reflected in the length of the socket (the shortest is 58mm for 工 series, and the longest is 448mm for 工 series)
Reducing tee: The maximum diameter reduction ratio is DN200×DN150, and the connection part needs to pass the 3.0MPa vibration test (1 million times)
Technology evolution analysis
Compared with the early compression connection, the socket-and-spigot compression technology proposed in this standard has the following advantages:
- Higher sealing reliability (passed 2500 hot and cold cycle tests)
- Better seismic performance (amplitude ±2.5mm vibration test)
- Simplified installation process (single hydraulic forming)
Implementation suggestions
1. Priority should be given to 06Cr17Ni12Mo2 materials for highly corrosive environments
2. Acid pickling and passivation treatment must be performed before installation (see Appendix C heat treatment process)
3. The gas system should be additionally tested for 1.05MPa air tightness
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