UG 81 TOLERANCE

Rules for the Construction of Pressure Vessels

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afify
Posts: 1
Joined: Tue 10. Jul 2018, 11:27

UG 81 TOLERANCE

Post by afify » Sun 30. Sep 2018, 07:21

Dears,
in UG 81(a), last para. The knuckle radius shall not be less than that specified. is that refer to the tolerance 1 1/4D to 5/8 D or the specified in drawing which will be 0.

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Dr. Kölbl
Posts: 201
Joined: Fri 31. Aug 2012, 21:55

Re: UG 81 TOLERANCE

Post by Dr. Kölbl » Mon 15. Oct 2018, 11:17

Both tolerance requirements shall be applied to the inner shape of the dished head. The knuckle radius shall have "-0"tolerance, the rest of the head shape must fall into the percentage of the diameter.

DK

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