Abstract： ASME B16.49:2012 pdf download.Factory-Made,Wrought Steel, Buttwelding InductionBends for Transportation and Distribution Systems. 3 SIZE The diameter of bends shall be identified by the nominal pipe size (NPS) as defined in ASME B36.lOM (e....

ASME B16.49:2012 pdf download.Factory-Made,Wrought Steel, Buttwelding InductionBends for Transportation and Distribution Systems.

3 SIZE

The diameter of bends shall be identified by the nominal pipe size (NPS) as defined in ASME B36.lOM (e.g., XI’S 24). Alternatively or in addition, the marking may include the nominal size as defined in ISO 670k1. which consists of the letters “I)N” followed by a dimensionless whole number, which is indirectly svbted to the physical sue, in millimeters, of the outside diameter of pipe to

which the bend is intended to be welded (e.g., DN 600).

4 MARKING

4.1 Standard Marking

Each bend shall be marked on the outside surface within 300 mm (12 in.) of one end to show the following:

(a) manufacturer’s name or trademark

(b) heat number or manufacturer’s heat Identification

(C) material grade symbol (see para. 11.3 and Table 1)

(d) B16.49

(e) nominal pipe size (NI’S)

(f) nominal wall thickness

(g) bend radius

(h) bend angle

(i) postbend ing, heat-treatment condition (see para. 9.3)

(j) supplementary requirements (if applicable) (see section SRI5)

Marking may be in any consistent units (metric or customary) but care shall be taken to avoid confusion. Use ‘X’ and grade in

lieu of “1” and grade for material designation for the customary stamping option.

When specified by the purchaser, each bend shall be paint-stenciled with the same information in 25 mm (1 in.) or larger letters on the inside surface within 150 mm (6 in.) of each end, except for NI’S 12 (L)N 300) or smaller, which only requires outside surface marking. Marking materials shall not adversely affect the bend or coating.

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