I want to specify high yield strength steel weld fittings. Can someone please explain the difference between ASTM A860 (Standard Specification for Wrought High-Strength Ferritic Steel Butt-Welding Fittings) and ASTM A694 (Standard Specification for Carbon and Alloy Steel Forgings for Pipe...
The problem is that the designer was supposed to keep the line below 20% SMYS at its MAOP of 650psi to keep the line out of the Transmission Category. He looked at the pressure rating of the flange and ignored the physical properties of the flange. My job is to review all as-builts. This...
It is B31.8 pipe, but barely over 20% SMYS at the flange.
If the pressure rating of a flange is based on the mated face properties (gasket, number of bolts, etc), why would anyone use a high yield strength slip-on flange? Is is due to welding specs? I don't see the advantage of using high...
The pipe in question carries natural gas and is a regulated line under 49CFR192. The pipe is API 5L-PLS2 grade X52. I am not worried about the pressure rating of the mated flange face; this rating does not change for a flange of a given pressure class even though the SMYS of the steel can vary...
6" standard ASTM A105, Gr. B, ANSI 300, weld neck flanges were used in a standard wall X52 natural gas piping system. I need to calculate the percentage of SMYS (%SMYS) when the system operates at its MAOP. The weld neck flange has a minimum neck length of 1/4" per Fig. II-7 of ASME B16.5 (see...
