Valve component built to NACE MR0175
Valve component built to NACE MR0175
(OP)
We are currently building a valve to API 6A and NACE MR0175-2003. This valve has an internal part that is a nonpressure-containing (but pressure-controlling) component. The part is loaded only with a compressive load; therefore, there is no tensile stress in the part, only a compressive stress.
Section 1.4 states that NACE is applicable to "total tensile stress (applied plus residual)". Since our part only has a compressive stress, it doesn't have to meet NACE MR0175.
Is this a correct assumption?
Section 1.4 states that NACE is applicable to "total tensile stress (applied plus residual)". Since our part only has a compressive stress, it doesn't have to meet NACE MR0175.
Is this a correct assumption?





RE: Valve component built to NACE MR0175
Depending on the shape of the part, it's entirely possible for a compressive load to produce a tensile stress.
Mike Halloran
NOT speaking for
DeAngelo Marine Exhaust Inc.
Ft. Lauderdale, FL, USA
RE: Valve component built to NACE MR0175
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/