On Jan 17, 2008, at 10:04 AM, Ken Nisly-Nagele wrote:
> One tubing manufacturer agreed that this material has been in use
> for years,
> that it is the same tube as one that is Listed, except for tube
> finish, and
> that they have been unable to convince the B31.3 committee to List
> it. I
> want to check into how a material gets Listed, and Sect. VIII may
> shed some
> light on that too.
I don't think you want to go to all that trouble. Probably easier to get the manufacturer to certify that the material complies with an ordinary tubing spec than to go through all the testing. If the tubing spec doesn't provide minimum mechanicals, forget it.
Christopher Wright P.E. |"They couldn't hit an elephant at chrisw@skypoint.com | this distance" (last words of Gen.
.......................................| John Sedgwick, Spotsylvania1864)
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