CORROSION ALLOWANCE AND ASME B16.34 1

smh345 · Nov 25, 2003

ASME B16.34 does not appear to allow for any corrosion allowance in the WT. I know that the WT required per the standard is very conservative and is based on very low stresses. Does any one have any views regarding ASME B16.34 WT and corrosion allowances? Is it necessary to increase the thickness over and above ASME B16.34 requirements if you could demonstrate by calculation that the thickness is adequate, and still in compliance with the standard?

RXH · Nov 26, 2003

There is an excellent article on this subject: "Estimating the available corrosion allowance in commodity valves manufactured to ASME and API standards", R.M.Bojarczuk, Valve World 2000 Conference Papers.

I'll quote from the conclusions: "......it can be shown that valves built to ASME B16.34, API 600 and API 602 could have an available corrosion allowance ranging from as low as 1/8" to as high as 3/4" depending on size, applicable code, and pressure class."

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CORROSION ALLOWANCE AND ASME B16.34 1

smh345

Mechanical

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RXH

Mechanical

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