本标准规定了ASTM A514 B级（UNS编号K11630）高强度（抗拉强度110000 psi或以上）钢板（也称为T-1钢）的合格美国机械工程师学会（ASME）钨极气体保护焊（GTAW）焊接工艺，最大厚度为2英寸。本标准提供了现场对现有管道系统进行维护和改造的焊接程序。除非事先获得美国宇航局工程部的批准，否则本标准不适用于新建工程。

This standard provides for a qualified American Society of Mechanical Engineers (ASME) weld procedure for Gas Tungsten Arc Welding (GTAW) of ASTM A514 Grade B (UNS No. K11630) high-strength (tensile strength of 110,000 psi or more) steel plate (also known as T-1 steel) up to a maximum thickness of 2 inches. This standard provides a weld procedure for performing maintenance and modifications to existing piping systems onsite. This standard is not for new construction unless prior approval is obtained from NASA Engineering.