本文件已被宣布为“稳定”，不再接受货币定期审查。用户负责验证技术指南的持续适用性。干密封螺纹应符合ASME B1的要求。20.3>p>。本标准涵盖的干密封美国标准锥管螺纹、干密封美国燃料内部直管螺纹和干密封美国中间内部直管螺纹符合美国标准ASA-B2。2.除螺纹长度外，本标准中的干密封SAE短锥管螺纹符合干密封美国标准锥管螺纹，螺纹长度缩短是为了增加间隙和节约材料。干密封螺纹的显著特点是在顶部和根部控制截断，以确保金属与金属的接触与侧面接触一致或在侧面接触之前。 顶部和根部的接触可防止螺旋泄漏，并确保在不使用润滑剂或密封剂的情况下密封接头。如果功能上没有问题，可以使用润滑剂，以最大限度地减少装配中磨损的可能性。

This document has been declared "Stabilized" and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying the continued suitability of technical guidance. Dry Seal threads should be in a ccordance with ASME B1.20.3>p>.The Dryseal American Standard Taper Pipe Thread, the Dryseal American fuel Internal Straight Pipe Thread and the Dryseal American intermediate internal Straight Pipe Thread covered by this standard conform with the American Standard ASA-B2.2. The Dryseal SAE-Short Taper Pipe thread in this standard conforms with the Dryseal American Standard Taper pipe thread except for the length of thread, which is shortened for increased clearance and economy of material. The significant feature of the dryseal thread is controlled truncation at the crest and root to assure metal to metal contact coincident with or prior to flank contact. Contact at the crest and root prevents spiral leakage and insures pressure-tight joints without the use of a lubricant or sealer. Lubricants, if not functionally objectionable, may be used to minimize the possibility of galling in assembly.