Abstract： ASME B16.25:2017 pdf download.Buttwelding Ends. 3 WELDING BEVEL DESIGN 31, BeveLs for Other Than GTAW Root Pass (a) Components having nominal wall thicknesses of 3 mm (0.12 in.) and less shall have ends cut square or slightly chamfered. (b)...

ASME B16.25:2017 pdf download.Buttwelding Ends.

3 WELDING BEVEL DESIGN

31, BeveLs for Other Than GTAW Root Pass

(a) Components having nominal wall thicknesses of 3 mm (0.12 in.) and less shall have ends cut square or slightly chamfered.

(b) Components having nominal wall thicknesses over 3 mm (0.12 in.) to 22 mm (0.88 In,) Inclusive shall have single angle bevels as Illustrated In Figure 2.

(c) Components having nominal wall thicknesses greater than 22 mm (0.88 In.) shall have compound angle bevels as illustrated in

Figure 3.

3.2 BeveLs for GTAW Root Pass

(a) Components having nominal wall thicknesses of 3 mm (0.12 in.) and less shall have ends cut square or slightly chamfered.

(b) Components having nominal wall thicknesses over 3 mm (0.12 in.) to 10 mm (0.38 In,) inclusive shall have 37’12-deg ± 2’/2-deg bevels or slightly concave bevels (see Figure 4).

(c) Components having nominal wall thicknesses over 10 mm (0.38 in.) to 25 mm (1.0 in.) inclusive shall have bevels as shown in Fi ure 5.

(d) Components having nominal wall thicknesses greater than 25 mm (1.0 in.) shall have bevels as shown in Figure 6.

3.3 Outside Diameter at WeLding Ends

Dimension A shall be either that specified in the applicable component standard or that specified in the purcha. sers component

specification. In the absence of a requirement for dimension A In a component standard or a purchasers specification, the values

for dimension A In Table I or Table I-I may be used.

4 PREPARATION OF INSIDE DIAMETER OF WELDING END

4.1 GeneraL

Preparation of the inside diameter at the end of a component shall be in accordance with one of the following, as specified by the purchaser:

(a) Components to be welded without backing rings shall meet the requirements of the standard or specification for the component.

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