PIPE TO FLANGE ALIGNMENT ON FABRICATION
PIPE TO FLANGE ALIGNMENT ON FABRICATION
(OP)
Whilst we all appreciate that a flange should normally be welded at right angle to the pipe as it is designed to do, does anyone have any absolute maximum limits for angular angular misalignment. A limiting factor will of course be the pipe outside dimater/flange internal diameter clearance to physically allow such alignment.
Thanks
Thanks





RE: PIPE TO FLANGE ALIGNMENT ON FABRICATION
NozzleTwister
Houston, Texas
RE: PIPE TO FLANGE ALIGNMENT ON FABRICATION
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/
RE: PIPE TO FLANGE ALIGNMENT ON FABRICATION
CFR 49, PART 192 § 192.233 Miter joints.
(a) A miter joint on steel pipe to be operated at a pressure that produces a hoop stress of 30 percent or more of SMYS may not deflect the pipe more than 3°.
(b) A miter joint on steel pipe to be operated at a pressure that produces a hoop stress of less than 30 percent, but more than 10 percent, of SMYS may not deflect the pipe more than 12 1/2° and must be a distance equal to one pipe diameter or more away from any other miter joint, as measured from the crotch of each joint.
(c) A miter joint on steel pipe to be operated at a pressure that produces a hoop stress of 10 percent or less of SMYS may not deflect the pipe more than 90°.
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RE: PIPE TO FLANGE ALIGNMENT ON FABRICATION
RE: PIPE TO FLANGE ALIGNMENT ON FABRICATION
Some clients have specs that forbid "miter joints", we usually get around it by using this code reference and calling them "crooked cuts".
Greg Lamberson
Consultant - Upstream Energy
Website: www.oil-gas-consulting.com