NASA-LLIS-1230

Lessons Learned - Welds Near Tube Bends

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T16:00:35Z
date available	2017-09-04T16:00:35Z
date copyright	01/21/1999
date issued	1999
identifier other	RIVEQCAAAAAAAAAA.pdf
identifier uri	https://yse.yabesh.ir/std/handle/yse/63758
description abstract	Description of Driving Event: During dimensional inspection of orbital tube welds involving 316L tubing, it was found that 8 of 8 welds failed because of weld mismatch. The weld joints were located between two bends that formed a "S" bend. There was approximately 1 inch of straight tubing from each bend to the joint of the weld. The mismatch in this case is not to exceed 25% or 0.010 inch which ever is less. Root cause: Tube bending / shaping typically causes the tube to take an oval shape, creating matching problems during weld fitting. Engineering drawings provided insufficient length for oval / runout to occur of the shaped / bent tube prior to welding of the joint.
language	English
title	NASA-LLIS-1230	num
title	Lessons Learned - Welds Near Tube Bends	en
type	standard
page	2
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1999
contenttype	fulltext
subject keywords	Hardware
subject keywords	Industrial Operations
subject keywords	NASA Standards
subject keywords	Parts Materials & Processes
subject keywords	Safety & Mission Assurance
subject keywords	Standard