本标准涵盖钛、钛合金、铝和铝合金锻造配件（承插焊和螺纹端）的额定值、尺寸、公差、标记和材料要求。具有特殊尺寸、螺纹或沉孔的管件可由制造商和买方协商制成。当此类配件符合本标准的所有其他要求时，应认为其符合本标准。

This Standard covers ratings, dimensions, tolerances, marking, and material requirements for titanium, titanium alloy, aluminum, and aluminum alloy forged fittings, both socket-welding and threaded ends. Fittings with special dimensions, threads, or counterbores may be made by agreement between the manufacturer and purchaser. When such fittings meet all other requirements of this Standard, they shall be considered in compliance with this Standard.