If the valve body material can be welded, but very different thermal expansion coefficient, or changes in operating temperature range of a larger thread junction closure weld must be honey.
如果阀体的材料是可以焊接的，但膨胀系数差异很大，或者工作温度的变化幅度范围较大，螺纹连接部必须进行蜜封焊。
Just because your car is constructed of welded metal parts doesn't mean that you must be skilled with a welding torch to drive it.
虽然汽车是由金属部件焊接构成，但并不意味着你必须熟练掌握焊接技术才能开车。
A good electrical connection to the material to be welded must be established.
一个良好的电气连接并焊接材料必须建立。
Must be Identified with the Tank that it belong, included the Slop Tanks, in proper manner, like welded seam or similar.
所有的人孔盖上必须用电焊或者类似方式做好舱名标识。
Earth clamps, which are part of the ground cables, must be installed closely to the welding area and directly to the material to be welded to avoid stray currents.
接地钳，这是地面电缆的一部分，必须连接在适当的地方，直接连接在焊件上以避免杂散电流。
Flanges may be made by sections; joints shall be beveled and field welded; bolt holes of two connecting flanges must be drilled together.
法兰允许按箱体分段制作固焊；接头处打坡口，工地拼接；法兰板连接孔须两两配钻制孔。
If the part needs to be welded subsequent to the oxidation treatment, the oxide layer must be removed before welding.
[nf - 14 d]倘若该零件需要在氧化处理后进行焊接，则焊接前必须将氧化层除掉。
If the part needs to be welded subsequent to the oxidation treatment, the oxide layer must be removed before welding.
[nf - 14 d]倘若该零件需要在氧化处理后进行焊接，则焊接前必须将氧化层除掉。
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