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API 650 Manholes

API 650 Manholes

API 650 Manholes

Is there any requirement about the surface finish on the face of the manholes, in the figure 5.7a of the API 650 2013 points that the face gasket shall be machine-finished to provide a minimum of 19 mm of gasket nearing, but doesn't specify the finish of is 125 rms, or 500 rms, i think that it will depend of the gasket material.

RE: API 650 Manholes

It usually isn't an issue- the gaskets used on manways are typically fairly soft materials.

RE: API 650 Manholes

So isn't necessary to machine the face or it doesn't matter what machine-surface finish we got to have ?

RE: API 650 Manholes

125-250 rms will be fine for most gaskets that are found in the oil business.

No machining whatsoever? You'll probably have some leakage issues - to what extent is a function of the gasket, mill scale quality and quantity, and the quality of the horse manure used as the gasket material.

RE: API 650 Manholes

jajajaja, thanks both JStephen and jte for the info.

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