1.1范围本标准适用于铸铁螺纹排水管件，包括（a）异径管件中指定开口的尺寸和方法（b）标记（c）材料（d）尺寸和公差（e）螺纹（f）肋（g）涂层（h）表面斜面1。2适用性本标准涵盖用于重力排水系统的配件，该系统仅在环境温度至约100°C（212°F）的条件下承受废液的重力头。本标准在加压废物处理系统中的使用由用户负责，并符合任何适用规范的要求。

1.1 ScopeThis Standard for cast iron threaded drainage fittings covers(a) sizes and method of designating openings in reducing fittings(b) marking(c) material(d) dimensions and tolerances(e) threading(f) ribs(g) coatings(h) face bevel1.2 ApplicabilityThis Standard covers fittings intended for use in gravity drainage systems subject only to the gravity head of waste liquids at temperatures from ambient to approximately 100°C (212°F). The use of this Standard for pressurized waste handling systems is the responsibility of the user and is subject to the requirements of any applicable code.