GB/T 11693-2022 in English
VALIDWelded bed plate for flanges of ship pipe
- Issued on:2022-10-12
- Implemented on:2022-10-12
- File Format:PDF
- Delivery:Via email within 5 business days
Price(USD)：
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$418.00
| Standard No: | GB/T 11693-2022 |
| Document status: | VALID |
| Title in English: | Welded bed plate for flanges of ship pipe |
| Title in Chinese: | 船用法兰焊接座板 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2022-10-12 |
| Implemented on: | 2022-10-12 |
| Superseding: |
GB/T 11693-2008 Welded bed plate for flanges of ship pipe
|
| ICS Classification: | 47.020.30-Piping systems |
| Professional Classification: | GB-National Standard |
| Related Keywords: | single-sided seat plate
b30080t1-40 seat plate double-sided seat plate alloy steel oval seat plate steel plate |
| Related Topics: | Plywood flange
boat flange GBT11693 GB/T 11693-1994 GB/T 11693-2008 GB/T 11693-2022 GB/T11693 Marine flange Changsha marine hydraulic method flange Marine hydraulic method flange wholesale Welding seat Flange welding Flange welding technology Marine flange wholesale Marine gas station standard flange gb/t11693-2008 gbt11693-2022 gb/t11693-2022 Marine forging standard flange gb/t 11693-2022 gb/t 11693-2008 |
《GB/T 11693-2022船用法兰焊接座板》由TC137（全国船用机械标准化技术委员会）归口，TC137SC3（全国船用机械标准化技术委员会管系附件分会）执行，主管部门为国家标准化管理委员会。
Introduction
Analysis of the core content of the standard
| Version comparison | GB/T 11693-2008 | GB/T 11693-2022 |
|---|---|---|
| Standard range | PN6-PN30 pressure range | New Class150 and JIS standard docking |
| Material requirements | Mainly carbon steel/stainless steel | Add 10CrNi3MoCu and other high-strength alloy steels |
| Interface standards | Mainly domestic standards | Compatible with ASME B16.5/JIS B2220 and other international standards |
Detailed explanation of key technical parameters
Seat plate classification system
- Type A: Single-sided seat plate (CB/T 4196 standard)
- Type B: Double-sided seat plate (GB/T 2501 standard)
- Type C: Oblate single-sided seat plate (maximum PN6)
- Type AA/BA: ASME B16.5 standard docking
- Type AJ/BJ: JIS B2220 standard docking (see Appendix A)
Typical application case
A 300,000-ton oil tanker pipeline system uses a B30080T1-40 seat plate:
- Material verification: 10CrNi3MoCu (922A) steel plate passes ultrasonic testing
- Dimension control: Flange diameter error ≤0.5mm (GB/T 1804 m grade)
- Welding process: Weld leg height ≥6mm (CCS specification requirement)
Material technical specifications
| Material code | Grade | Standard basis | Applicable pressure |
|---|---|---|---|
| T1 | 10CrNi3MoCu | Special technical conditions | PN30/Class150 |
| N5 | 06Cr19Ni10 | NB/T 47010 | Corrosive media |
Implementation suggestions
Key points for design selection
- International ships give priority to AA/BA type seat plates (ASME standard)
- PN30 high-pressure pipelines must be made of alloy steel
- Oval seat plate is only suitable for low-pressure pipelines with DN≤40
Inspection precautions
- Material certificate should include impact test data (-20℃ KV2≥80J)
- Sealing surface roughness Ra≤3.2μm
- Quality deviation control within +4%
Sample only — not a preview of GB/T 11693-2022
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