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涵蓋了尺寸為NPS 1/2至NPS 48（DN 15至DN 1200）的工廠製造鍛造對接焊配件的外形尺寸、公差、額定值、測試和標記。

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還涵蓋了根據製造商和買方之間的協議製成的特殊尺寸、大小、形狀和公差的管件。采用環形或交叉焊縫的預製支管、鞍座和其他配件被視為除ASME B16.9配件之外的管道製造。但是，裝配式搭接接頭短端不受上述限製，前提是它們符合適用的ASTM材料規範的所有要求。

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.

“鍛造”一詞表示由無縫或焊接管、管材、板材或鍛件製成的配件。金屬管道供應ASME B16.9對接焊接管件，材料範圍廣泛，包括碳鋼、合金鋼、不鏽鋼和有色金屬。這些配件包括長半徑彎頭、異徑彎頭、長半徑回位、短半徑彎頭、短半徑180°回位、3D彎頭、直三通、直十字、異徑三通、異徑十字、搭接短端、蓋子、同心異徑管和偏心異徑管。提供的所有配件應無凹痕、劃痕、尖銳交叉（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標準涵蓋了尺寸為NPS 1/2至NPS 48（DN 15至DN 1200）的工廠製造鍛造對接焊配件的外形尺寸、公差、額定值、測試和標記。

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.所有尺寸均以英寸為單位。除非另有說明，否則公差等於正負。

1. Out-of-round is the sum of absolute values of plus and minus tolerance.輪外誤差是正負公差絕對值之和。
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.此公差可能不適用於需要增加壁厚以滿足ASME B16.9設計要求的成型配件的局部區域。
3. The inside diameter and the nominal wall thicknesses at ends are to be specified by the purchaser.3.內徑和端部標稱壁厚由買方指定。
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. 除非買方另有規定，否則這些公差適用於公稱內徑，公稱內徑等於公稱外徑與公稱壁厚的兩倍之差。

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鍋爐和壓力容器規範（BPVC）以及ASME壓力管道規範的管轄範圍內使用。根據ASME B16.5，法蘭的壓力額定值可指定為150、300、600、900、1500和2500級。ASME B16.9管件的允許壓力額定值可根據ASME B31壓力管道規範適用章節中規定的規則，按等效材料的無縫直管計算。

Design of Fittings配件設計

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.

根據ASME B16.9製造的對接焊接管件的設計應通過以下方法之一確定：（a）壓力容器或管道規範中包含的數學分析；（b） 驗證測試；（c） 通過靜水壓試驗進行實驗應力分析，以驗證實驗結果；（d） 詳細的應力分析和結果評估。

Standard Marking標準標記

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管件應標記以下詳細信息：“商標+材料等級+壁厚+尺寸+爐號”。例如，“M ASTM A234 WP5 SCH80 6”385。使用鋼印時，應注意
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.

標記不夠深或不夠鋒利，不會導致裂紋或將配件的壁厚減小到允許的最小值以下。

Material & Manufacture材料與製造

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配件可由多種材料製成，包括（1）符合ASTM A234和ASTM A420的碳鋼和低合金鋼；（2） 符合ASTM A403和ASTM A815的奧氏體和雙相不鏽鋼；（3） 符合ASTM B366的鎳合金；（4） 符合ASTM B361的鋁合金；以及（5）符合ASTM B363的鈦合金。

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長半徑對接焊彎頭
• ASME / ANSI B16.9 Butt Weld Elbow – Short Radius  ASME/ANSI B16.9對接焊彎頭——短半徑
• ASME / ANSI B16.9 Butt Weld Reducing Elbow  ·ASME/ANSI B16.9對接焊異徑彎頭
• ASME / ANSI B16.9 Butt Weld 45° Elbow  ·ASME/ANSI B16.9對接焊45°彎頭
• ASME / ANSI B16.9 Butt Weld Fabricated Tee·ASME/ANSI B16.9對焊預製三通
• ASME / ANSI B16.9 Butt Weld Reducer  ·ASME/ANSI B16.9對接焊縫縮徑管
• ASME / ANSI B16.9 Butt Weld Concentric Reducer  ·ASME/ANSI B16.9對接焊縫同心異徑管
• ASME / ANSI B16.9 Butt Weld Eccentric Reducer  ·ASME/ANSI B16.9對焊偏心異徑管
• ASME / ANSI B16.9 Butt Weld 3D Elbow  ·ASME/ANSI B16.9對接焊3D彎頭
• ASME / ANSI B16.9 Butt Weld Stub Ends  ·ASME/ANSI B16.9對接焊短端
• ASME / ANSI B16.9 Butt Weld Cross  ·ASME/ANSI B16.9對接焊縫交叉
• ASME / ANSI B16.9 Butt Weld Reducing Cross·ASME/ANSI B16.9對接焊縫縮徑交叉
• ASME / ANSI B16.9 Butt Weld Tees  ·ASME/ANSI B16.9對接三通
• ASME / ANSI B16.9 Butt Weld End Cap  ·ASME/ANSI B16.9對接焊端蓋
• ASME / ANSI B16.9 Butt Weld Coupling  ·ASME/ANSI B16.9對接焊接接頭
• ASME / ANSI B16.9 Butt Weld Pipe Nipple  ·ASME/ANSI B16.9對焊管接頭
• ASME / ANSI B16.9 Butt Weld 5D Elbow  ·ASME/ANSI B16.9對接焊5D彎頭
• ASME / ANSI B16.9 Butt Welded Pipe Fittings  ·ASME/ANSI B16.9對接焊接管件