This paper describes the welding procedure qualification of the multilayer "lamellar" flange for modern bridge construction made in the Czech Republic. The finegrained structural steel was used for construction and welding qualification. Weldability of this steel grade is briefly mentioned. Technological and proposed welding processes including weld joint preparation are described. FCAW welding in the overhead position is carried out by the seamless flux cored wire and SAW welding using solid wire in the flat position is applied. All required tests on the multilayer weld joint including tensile test, bend test, hardness distribution, impact test, and macroscopic evaluation are investigated. All test results are in good agreement with EN ISO 15614-1 standard requirements. Based on the satisfactory results, the proposed welding procedure for the multilayer flange weld joint can be qualified.
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机译：本文介绍了捷克共和国现代桥梁建设的多层“板状”法兰的焊接程序资格。精细的结构钢用于建筑和焊接资格。简要提及该钢等级的可焊性。描述了包括焊接接头制剂的技术和提出的焊接工艺。架空位置中的FCAW焊接由无缝磁通芯线进行，并且使用固体线在施加平坦位置锯焊接。研究了包括拉伸试验，弯曲试验，硬度分布，冲击试验和宏观评估的多层焊接接头上的所有测试。所有测试结果与EN ISO 15614-1标准要求一致。基于令人满意的结果，拟议的多层法兰焊接接头的焊接程序可以合格。
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