GB/T 19066.2-2020 in English
SUPERSEDEDComposite wave-serrated metal gaskets for pipe flanges—Part 2:Class designated
- Issued on:2020-11-19
- Implemented on:2021-06-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$233.00
《GB/T 19066.2-2020管法兰用金属波齿复合垫片 第2部分：Class系列》由TC237（全国管路附件标准化技术委员会）归口，主管部门为中国机械工业联合会。
Introduction
Analysis of the core content of the standard
| Technical elements | GB/T19066.2-2020 | Old version of the standard |
|---|---|---|
| Scope of application | Class150-Class1500 | Including PN series |
| Metal skeleton materials | 6 new alloy materials | Basic materials only |
| Dimensional tolerance | Optimized limit deviation system | Wider tolerance band |
Key technical requirements
Material system: The metal skeleton is added with duplex stainless steel such as 022Cr23Ni5Mo3N, and the chlorine content of the flexible graphite in the covering layer is ≤50μg/g. Anti-oxidation graphite must pass the 670℃/4h thermal weight loss test.
Process control: Gaskets above DN300 are allowed to be spliced, but the weld spacing is required to be ≥150mm and full penetration process. The wave tooth processing must ensure the consistency of tooth pitch (2.0-5.0mm) and flatness (≤1% of the outer diameter).
Performance Index Comparison
| Test Items | Class300 Index | Test Method |
|---|---|---|
| Compression Rate | 35±10% | GB/T12622 |
| Rebound Rate | ≥15% | GB/T12622 |
| Seal Leakage Rate | ≤1.0×10-4cm3/s | GB/T12385 |
Implementation suggestions
- When selecting, the flange sealing surface type (raised face/concave-convex face/tongue-and-groove face) and the gasket structure should be considered simultaneously
- Oxidizing media should use anti-oxidation flexible graphite (maximum 650℃)
- The installation preload stress is controlled at 45MPa (Class300 example)
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 29038-2024 in English
Technical specification for light gauge stainless steel piping
2024-09-29 -
GB/T 19066.1-2020 in English
Composite wave-serrated metal gaskets for pipe flanges—Part 1:PN designated
2020-11-19 -
GB/T 2501-2010 in English
Connection dimensions and mating face of marine flanges
2011-01-10 -
GB/T 12621-2008 in English
Standard test method for stress relaxation of gaskets for pipe flanges
2008-05-07 -
GB/T 22051-2008 in English
Cold-expansion fittings with sliding compression-sleeves for cross-linked polyethylene(PE-X) pipe
2008-06-18 -
GB/T 8259-2008 in English
Specification for flexible joints of housing
2008-12-31 -
GB/T 46627-2025 in English
Standard test methods for sealability of gaskets at elevated temperature for pipe flanges
2025-10-31 -
GB/T 26120-2010 in English
Pipework—Stainless steel threaded fittings
2011-01-10 -
GB/T 33926-2017 in English
Stainless steel pipe fitting of ring compression
2017-07-12
