ASME 16.9 covers overall dimensions, tolerances, ratings, testing, and markings for factory-made wrought butt-welding fittings in sizes NPS 1⁄2 through NPS 48 (DN 15 through DN 1200).

ASME 16.9涵盖了尺寸为NPS 1/2至NPS 48（DN 15至DN 1200）的工厂制造锻造对接焊配件的外形尺寸、公差、额定值、测试和标记。

ASME B16.9 also covers pipe fittings made to special dimensions, sizes, shapes, and tolerances by agreement between the manufacturer and the purchaser. Fabricated laterals, saddles, and other fittings employing circumferential or intersection welds are considered pipe fabrication other than ASME B16.9 fittings. However, fabricated lap joint stub ends are exempt from the above restrictions, provided they meet all the requirements of the applicable ASTM material specification.

ASME B16.9还涵盖了根据制造商和买方之间的协议制成的特殊尺寸、大小、形状和公差的管件。采用环形或交叉焊缝的预制支管、鞍座和其他配件被视为除ASME B16.9配件之外的管道制造。但是，装配式搭接接头短端不受上述限制，前提是它们符合适用的ASTM材料规范的所有要求。

The term “wrought” denotes fittings made of seamless or welded pipes, tubing, plates, or forgings. Metals-Piping supplies ASME B16.9 butt-welding pipe fittings in a comprehensive range of materials covering carbon steel, alloy steel, stainless steel and non-ferrous metals. These fittings include long radius elbows, reducing elbows, long radius returns, short radius elbows, short radius 180° returns, 3D elbows, straight tees, straight crosses, reducing tees, reducing crosses, lap joint stub ends, caps, concentric reducers, and eccentric reducers. All fittings supplied shall be free of imperfections such as dents, scratches, sharp intersections(corners), pits, and creases, etc.

“锻造”一词表示由无缝或焊接管、管材、板材或锻件制成的配件。金属管道供应ASME B16.9对接焊接管件，材料范围广泛，包括碳钢、合金钢、不锈钢和有色金属。这些配件包括长半径弯头、异径弯头、长半径回位、短半径弯头、短半径180°回位、3D弯头、直三通、直十字、异径三通、异径十字、搭接短端、盖子、同心异径管和偏心异径管。提供的所有配件应无凹痕、划痕、尖锐交叉（拐角）、凹坑和折痕等缺陷。

ASME / ANSI B16.9 dimension  ASME/ANSI B16.9尺寸

ASME B16.9 Standard covers overall dimensions, tolerances,ratings, testing, and markings for factory-made wrought buttwelding fittings in sizes NPS 1⁄2 through NPS 48 (DN 15 through DN 1200).

ASME B16.9标准涵盖了尺寸为NPS 1/2至NPS 48（DN 15至DN 1200）的工厂制造锻造对接焊配件的外形尺寸、公差、额定值、测试和标记。

Tolerances of Welded Fittings焊接配件的公差

All dimensions are given in inches. Tolerances are equal plus and minus except as noted.所有尺寸均以英寸为单位。除非另有说明，否则公差等于正负。

1. Out-of-round is the sum of absolute values of plus and minus tolerance.轮外误差是正负公差绝对值之和。
2. This tolerance may not apply in localized areas of formed fittings where increased wall thickness is required to meet design requirements of ASME B16.9.2.此公差可能不适用于需要增加壁厚以满足ASME B16.9设计要求的成型配件的局部区域。
3. The inside diameter and the nominal wall thicknesses at ends are to be specified by the purchaser.3.内径和端部标称壁厚由买方指定。
4. Unless otherwise specified by the purchaser, these tolerances apply to the nominal inside diameter, which equals the difference between the nominal outside diameter and twice the nominal wall thickness.
5. 除非买方另有规定，否则这些公差适用于公称内径，公称内径等于公称外径与公称壁厚的两倍之差。

The ASME B16.9 pipe fittings can be used under the jurisdiction of the ASME Boiler & Pressure Vessel Code (BPVC) as well as the ASME Code for pressure piping. Referencing pressure ratings of flanges per ASME B16.5, they can be designated as Classes 150, 300, 600, 900, 1500 and 2500. The allowable pressure ratings for ASME B16.9 pipe fittings may be calculated as for straight seamless pipe of equivalent material in accordance with the rules established in the applicable sections of ASME B31 Code for pressure piping.

ASME B16.9管件可在ASME锅炉和压力容器规范（BPVC）以及ASME压力管道规范的管辖范围内使用。根据ASME B16.5，法兰的压力额定值可指定为150、300、600、900、1500和2500级。ASME B16.9管件的允许压力额定值可根据ASME B31压力管道规范适用章节中规定的规则，按等效材料的无缝直管计算。

Design of Fittings配件设计

The design of butt welding pipe fittings made to ASME B16.9 shall be established by one of the following methods: (a) mathematical analyses contained in pressure vessel or piping codes; (b) proof testing; (c) experimental stress analysis with hydrostatic testing to validate experimental results; (d) detailed stress analysis with results evalsuation.

根据ASME B16.9制造的对接焊接管件的设计应通过以下方法之一确定：（a）压力容器或管道规范中包含的数学分析；（b） 验证测试；（c） 通过静水压试验进行实验应力分析，以验证实验结果；（d） 详细的应力分析和结果评估。

Standard Marking标准标记

Generally, ASME B16.9 pipe fittings shall be marked to show the following details: “trademark + material grade + wall thickness + size + heat number”. For example, “M ASTM A234 WP5 SCH80 6″ 385“. When steel stamps are used, care shall be taken so that

通常，ASME B16.9管件应标记以下详细信息：“商标+材料等级+壁厚+尺寸+炉号”。例如，“M ASTM A234 WP5 SCH80 6”385。使用钢印时，应注意
the marking is not deep enough or sharp enough to cause cracks or to reduce the wall thickness of the fitting below the minimum allowed.

标记不够深或不够锋利，不会导致裂纹或将配件的壁厚减小到允许的最小值以下。

Material & Manufacture材料与制造

The ASME B16.9 fittings may be made from an extensive range of mateirals covering (1) carbon and low-alloy steels in accordance with ASTM A234 and ASTM A420; (2) austenitic and duplex stainless steels in accordance with ASTM A403 and ASTM A815; (3) nickel alloys in accordance with ASTM B366; (4) aluminum alloys in accordance with ASTM B361; and (5) titanium alloys in accordance with ASTM B363.

ASME B16.9配件可由多种材料制成，包括（1）符合ASTM A234和ASTM A420的碳钢和低合金钢；（2） 符合ASTM A403和ASTM A815的奥氏体和双相不锈钢；（3） 符合ASTM B366的镍合金；（4） 符合ASTM B361的铝合金；以及（5）符合ASTM B363的钛合金。

Pipe Fittings Dimensions Tolerance as per ASME B16.9:管件尺寸公差符合ASME B16.9：

Sizes 1/2″ – 48″ 尺寸1/2英寸-48英寸

• ASME / ANSI B16.9 Butt Weld Elbow – Long Radius·ASME/ANSI B16.9长半径对接焊弯头
• ASME / ANSI B16.9 Butt Weld Elbow – Short Radius  ASME/ANSI B16.9对接焊弯头——短半径
• ASME / ANSI B16.9 Butt Weld Reducing Elbow  ·ASME/ANSI B16.9对接焊异径弯头
• ASME / ANSI B16.9 Butt Weld 45° Elbow  ·ASME/ANSI B16.9对接焊45°弯头
• ASME / ANSI B16.9 Butt Weld Fabricated Tee·ASME/ANSI B16.9对焊预制三通
• ASME / ANSI B16.9 Butt Weld Reducer  ·ASME/ANSI B16.9对接焊缝缩径管
• ASME / ANSI B16.9 Butt Weld Concentric Reducer  ·ASME/ANSI B16.9对接焊缝同心异径管
• ASME / ANSI B16.9 Butt Weld Eccentric Reducer  ·ASME/ANSI B16.9对焊偏心异径管
• ASME / ANSI B16.9 Butt Weld 3D Elbow  ·ASME/ANSI B16.9对接焊3D弯头
• ASME / ANSI B16.9 Butt Weld Stub Ends  ·ASME/ANSI B16.9对接焊短端
• ASME / ANSI B16.9 Butt Weld Cross  ·ASME/ANSI B16.9对接焊缝交叉
• ASME / ANSI B16.9 Butt Weld Reducing Cross·ASME/ANSI B16.9对接焊缝缩径交叉
• ASME / ANSI B16.9 Butt Weld Tees  ·ASME/ANSI B16.9对接三通
• ASME / ANSI B16.9 Butt Weld End Cap  ·ASME/ANSI B16.9对接焊端盖
• ASME / ANSI B16.9 Butt Weld Coupling  ·ASME/ANSI B16.9对接焊接接头
• ASME / ANSI B16.9 Butt Weld Pipe Nipple  ·ASME/ANSI B16.9对焊管接头
• ASME / ANSI B16.9 Butt Weld 5D Elbow  ·ASME/ANSI B16.9对接焊5D弯头
• ASME / ANSI B16.9 Butt Welded Pipe Fittings  ·ASME/ANSI B16.9对接焊接管件