法兰允许用钢板拼接焊制，对长颈法兰应符合GB 150的有关规定。
Blend steel welding of flanges is allowed. Long neck flange should conform to related stipulations of GB 150.
研制的容器主焊缝埋弧焊材与国外典型的埋弧焊焊材在焊接工艺性能和熔敷金属力学性能及纯净度方面对比，结果表明研制焊材与日本神户制钢所的US-521HD／PF-500D焊材相当。
The weldability, deposited metal's mechanical properties and purity of the new developed shell butt welding SAW material as the same level compared with Kobe Steel US-521HD/PF-500D.
基于极限分析的观点，推导了工业中焊制三通在面内弯矩作用下的极限载荷估算式。
The limit load calculation of welding piping tees under the action of the in plane bending moment was derived based on the limit analysis.
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