ASME B16.25:2012 pdf download.Buttwelding Ends.
3 WELDING BEVEL DESIGN
3.1 Bevels foe Other Than GTAW Root Pass
(a) Components having nominal wall thicknesses nf 3 mm (0.12 in.) and less shall base ends cut square or slightly chamfered,
(b) Components having nominal wall thicknesses over 3 mm (0.12 in.) Ii, 22 mm (0.88 in.) inclusive shall base single angle bevels as illustrated in Fig. 2.
(c) Components basing nominal wall thicknesses greater than 22mm (088 In) shall have compound angle bevels as illustrated in Fig. 3.
3.2 Bevels foe GIAW Root Pass
(a) Components having nonnnal wall thicknesses of 3 mm (0.12 in.) and less shall base ends cut square or slightly chamfered.
(b) Components having nominal wall thicknesses 3 mm (0.12 in.) to 10 mm (0.38 En.) inclusive shall have 37-deg * 2-deg lwvels or slightly concave bevels (lire Fig. 4).
(c) Components having nominal wall thicknesses over 10 mm (0.38 In.) 1o25 mm 1.1.0 in.) Inclusive shall base bevels as shown in FAg 5.
(d) Components having nominal wall thicknesses greater than 25mm (1.0 in.) shall have bevels as shown in Fig. 6.
3.3 OutsIde Diameter at Welding Ends
flimension A shall be either that specified in the applicable component standard or that specified in the purchaser’s component specification. In the absence of a requirement Ice dimension A in a coinponont standard or a purchaer’s specIicatluss. the salues for diniension A In TaNe 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 lolluwing. as specified by the purchaser:
(a) Components to be welded without hacking rings shall meet the requirensents of the standard or specification for the component.
3.1 Bevels foe Other Than GTAW Root Pass
(a) Components having nominal wall thicknesses nf 3 mm (0.12 in.) and less shall base ends cut square or slightly chamfered,
(b) Components having nominal wall thicknesses over 3 mm (0.12 in.) Ii, 22 mm (0.88 in.) inclusive shall base single angle bevels as illustrated in Fig. 2.
(c) Components basing nominal wall thicknesses greater than 22mm (088 In) shall have compound angle bevels as illustrated in Fig. 3.
3.2 Bevels foe GIAW Root Pass
(a) Components having nonnnal wall thicknesses of 3 mm (0.12 in.) and less shall base ends cut square or slightly chamfered.
(b) Components having nominal wall thicknesses 3 mm (0.12 in.) to 10 mm (0.38 En.) inclusive shall have 37-deg * 2-deg lwvels or slightly concave bevels (lire Fig. 4).
(c) Components having nominal wall thicknesses over 10 mm (0.38 In.) 1o25 mm 1.1.0 in.) Inclusive shall base bevels as shown in FAg 5.
(d) Components having nominal wall thicknesses greater than 25mm (1.0 in.) shall have bevels as shown in Fig. 6.
3.3 OutsIde Diameter at Welding Ends
flimension A shall be either that specified in the applicable component standard or that specified in the purchaser’s component specification. In the absence of a requirement Ice dimension A in a coinponont standard or a purchaer’s specIicatluss. the salues for diniension A In TaNe 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 lolluwing. as specified by the purchaser:
(a) Components to be welded without hacking rings shall meet the requirensents of the standard or specification for the component.
