The PQR shall include the composition and flow rate of the shielding and inert gas backing, when used.

焊接工艺评定记录单上应包括封底焊时所用的惰性保护气体组成成分和流率。

According to the requirement of the construction drawings and related technical specifications, responsible for heat treatment and welding document writing of the products and PQR.

根据设计图纸及相关技术标准要求，负责产品热处理和焊接工艺文件的撰写。

First, prepare WPS, and then press WPS welding process evaluation, PQR report form, only the welding procedure qualification requirements, WPS can be used in the products of welding.

先编制WPS，然后按WPS做焊接工艺评定，形成PQR报告，只有焊接工艺评定符合要求，WPS才能用在产品的焊接上。