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承插焊管件尺寸的极限偏差 Tolerances for Socket-Welding Fittngs 公称通径 Nominal Pipe Size 45°、90°弯头、三通、四通、45°斜三通 45°、90°Elbows、Tees、Crosses、Laterals Couplings 单承口箍、半管接头、异径插入件 Half-Couplings Boss Reducer Inserts 异径插入件 Reducer Inserts 异径插入件 Reducer Inserts 活接头（含螺纹） Unions(compriise threaded unions) 所有管件 所有管件 All Fittings All Fittings 双承口管箍 承插孔径 流通孔径 Socket DIA 中心至承插孔底 Socket 结构长度 Laying Length 结构长度 Laying Length 主体外径 Shank DIA 插入端长度 Shank Length SL --- 0 -1.5 0 -2.0 0 -2.5 公称装配长度 Length Assem Nominal Bore DIA Center to Bottom of DN 6-8 10-20 NPS 1/8-1/4 3/8-3/4 d1 d2 A、H ±0.8 E ±1.5 ±3.0 F ±0.8 ±1.5 SD --- ±0.25 L ±1.5 ±1.5 +0.3 0 ±0.4 ±1.5 25-50 1-2 +0.4 0 ±2.0 ±4.0 ±2.0 ±0.25 ±1.5 65-100 21/2-4 ±0.8 ±2.5 ±5.0 ±2.5 ±0.5 ±1.5 ·不同标准规定的极限偏差可能会略有差异，使用时请查阅原标准。 ·There may be differences between the tolerances of the different codes,and when using please refer to the original codes. SCH160和双加厚管的公称壁厚 ASME B16.11 Nominal Waill Thckness of Schedule 160 and Double Extra Strong Pipe In ASME B16.11 公称通径 Nominal Pipe Size DN 6 8 10 NPS 1/8 1/4 3/8 SCH160 3.15 3.68 4.01 公称壁厚 Norminal Wall Thickness XXS 4.83 6.05 6.40 ·由于ASME B36.10M 未包括DN6、8和10的SCH160和XXS的壁厚，表列数值可作为确定额定值时管子的公称壁厚。 ·Since ASME B36.10M does not include Schedule 160 nor include double Extra Strong thickness for DN6,8,and 10,the values in table may beused as the nominal wall thincknesses of the pipe for rating purposes. 管件级代号与管子壁厚代号的关系 Relevance of Fittings Class with Schedule Nunber or Wall Designation of pipe for Calculation of Ratings 管件级别代号 class designation fo Fitting 管件连生产建设形式 Type of Fitting 用作额定计算依据的管子 Pipe Used for Ratin Basis 管子表号 管壁代号 Schedule NO. 2000 3000 6000 3000 6000 9000 螺纹 Threaded 螺纹 Threaded 螺纹 Threaded 承插焊 Socket-Welding 承插焊 Socket-Welding 承插焊 Socket-Welding 80 160 --- 80 160 --- Wall Designation XS --- XXS XS --- XXS ·本表并未限制使用较薄或较厚壁厚的管子和管件。实际采用的管子公称壁厚可小于或大于本表所示的管子公称壁厚。采用较薄管子时。其强度可支配额定值；采用较厚管子时（例如对机械强度而言），管件的强度支配额定值。 ·This table is nkt intended to restrict the use of pipes and fittings of thinner or thicker wall.Pipe actually used may be thinner or thicker in nominal wall than that shown in Table. When thinner pipe is used,its strength may govern the rating.When thincker pipe is used(e.g,formechanical strength),the strength of the fitting governs the rating.

螺纹管件 Threaded Fittings GB/T 1426、ASME B16.11 90°弯头、三通、四通 90°Elbows、Tees、Crosses 公称通径 Nominal Pipe Size 45°弯头 45°Elbows 所有管件 All Fittings 中心至端面 Center to End 中心至端面 Center to End 端部外径 Outside Diameter of Band 最小壁厚 螺纹长度 Minimum Wall Thickness Length of Thread Min A DN NPS 2000 3000 G D 3000 C 6000 B L2 SCH80 SCH160 XXS SCH80 SCH160 XXS SCH80 SCH160 XXS SCH80 SCH160 XXS 6000 2000 3000 6000 2000 6000 2000 3000