Analysis of the Differences in Evaluation Standards for Different Welding Processes in Ocean Engineering

YAN Wentao

doi:10.7512/j.issn.1001-2303.2025.05.19

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Analysis of the Differences in Evaluation Standards for Different Welding Processes in Ocean Engineering
Vol. 55, Issue 5, Pages: 135-139(2025)
Received：16 August 2024，

Revised：2025-02-25，

Published：20 May 2025
DOI： 10.7512/j.issn.1001-2303.2025.05.19
稿件说明：

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兖文涛.海洋工程不同焊接工艺评定标准差异分析［J］.电焊机，2025，55（5）：135-139. DOI： 10.7512/j.issn.1001-2303.2025.05.19.

YAN Wentao.Analysis of the Differences in Evaluation Standards for Different Welding Processes in Ocean Engineering[J].Electric Welding Machine, 2025, 55(5): 135-139. DOI： 10.7512/j.issn.1001-2303.2025.05.19.

摘要

针对海洋工程领域焊接工艺评定标准存在的差异性，选取NB/T47014《承压设备焊接工艺评定》与DNV-OS-F101《海底管道系统规范》两大标准，基于GTAW/SMAW焊接方法及对接接头形式，系统开展焊接工艺重要变素评定规则与试验要求的对比分析。通过解构母材分类原则、焊材评定规则、厚度覆盖范围、坡口形式要求、焊接位置限制等核心要素，分析两个标准在评定范围、试验项目及检验数量方面的显著差异。研究表明：DNV-OS-F101在母材供应商认证、焊材直径控制、无损检测项目等方面具有更严格的技术要求，其力学性能检测项目较NB/T47014更为全面；而NB/T47014在坡口形式变更、焊接位置调整等方面展现出更广的工艺覆盖性。研究证实两个标准在材料强度梯度匹配、热输入控制区间等关键参数上存在技术兼容空间。工程实践表明，基于兼容性分析制定焊接工艺评定方案，可有效减少重复试验次数，降低企业认证成本。

Abstract

At present

the main welding process qualification standards and specifications commonly employed in the welding and manufacturing of marine structural engineering and subsea pressure pipelines within the company are primarily NB/T47014 and DNV-OS-F101. Taking the frequently utilized welding methods (GTAW/SMAW) and butt welds in engineering as examples

this paper conducts a comparative analysis of the crucial variables of the main welding procedures and the tests and inspections for qualification in the two standards. The results indicate that there are considerable differences between the two qualification standards

but similarities also exist. In actual production

when welding process technicians undertake the planning of welding process qualification in the early stage

based on the actual requirements of the project and by comprehensively considering the compatibility between the two standards

they can rationally arrange the welding qualification tests

reduce the frequency and quantity of the tests to avoid unnecessary repetitions and cost waste

and effectively achieve the goal of cost reduction and efficiency enhancement.

关键词

Keywords

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