PRCI Report 214

L51721e

Battelle Memorial Institute

Need: Fittings specified to be in accordance with MSS SP-75 have been found by purchasers to have fitting yield strengths less than the matching specified pipe without the marking required in MSS SP-75 17.1c. As will be discussed, there are two strength requirements in MSS SP-79 Section 8 Tensile Properties.

Benefit: The report provides guidance for the evaluation of "as-received" fittings. The types of fittings considered are elbows, tees, caps and reducers conforming to Manufacturers Standardization Society Standard Practice 75, "Specification for High Test Wrought Butt Welding Fittings (1993 edition).

Result: Guidance for estimating the burst strength of fittings is in the form of functionality relating burst-strength rations to ultimate tensile-strength ratios. Also concepts are presented that allow for the estimation of yield pressure for a fitting. The latter is given as a "first approach" to the subject as the yield pressure of a fitting has not been precisely defined.

Product Details

Published:

01/01/1995

Number of Pages:

44

File Size:

1 file , 760 KB