ASME B18.9:2003 pdf free download

ASME B18.9:2003 pdf free download.FACTORY-MADE WROUGHT BUTTWELDING FTTINGS.
6.2.1 For applications where fatigue loading a ccen. required minimum dimensions shall be furnished by the purchaser.
6.2.2 lore Dtemar. Bore diameters away from the ends are not specified. If special flow path requirements axe needed, the bore diniensiors shall be specified by e purchaser.
6.23 Stub Service conditions and joint constructlcn often dictate stub end Length requirements Therefore, dw purchaser must specify long or short pat. teni fitting when ordering. [See General Note (c) in Tables 10 and 19J
7 SURFACE CONTOURS
Where adjati1d openings in fittings are not In parallel planes, they shall be joined by a circular arc or radius on the extmal surfaces. The arc or radius may be terminated in tangents. Except as provided for block forgings (see pars. 5), the pn*cted profile of external surfaces of fittings shall r have sharp intersections (corners) and/or collapsed arm.
• END PREPARATION
Unless otherwise specified, the details of the welding end preparation shall be in accordance with Table 1. Transitions fnmi d welding bevel to the outside surface of the fitting and from the root face to the Inside surface of the fitting lying within the maximum envelope shown in PIg. 1 are at the manufacturer’s option, except as covered in Note (5) of Pig. I or unless otherwise specifically ordered.
9 DESIGN PROOF TEST
9.1 RequIred Tts
Proof tests shall be made as set forth In this Standard wtwt the manufacturer chooses proof testing to qualify the fitting design. Unless otherwise agreed upon between the manufacturer and purchaser, the proof test shall be one based on the computed bursting pressure of the fitting and Its connecting piping.
Lap joint stub ends axe exempt from proof testing because they axe used In a flange aeuibly, which will have difkd ratings depending on service application.
9. Appllcabllity of ‘Test Results
tis not necessary to conduct an individual test offittings with all combinations of sizes, wall thicknesses,and materials.A successful proof test on one representa-tive fitting may represent others to the extent describedinparas. 9.4.1,9.4.2, and 9.4.3.
9.4.1Size Range.One test fitting may be used toqualify similarly proportioned fittings with a size rangefrom one-half to twice that for the tested fitting.Thetest of a nonreducing fitting qualifies reducing fittings ofthe same pattern. The test of a reducing fitting qualifiesreductions to smaller sizes.
9.4.2 Thickness Range.One test fitting may be usedto qualify similarly proportioned fittings with t/Dranges from one-half to three times that for the testedfitting.-
9.4.3 Material Grades. The pressure retaining capac-ity of a geometrically identical fitting made of various.