ASTM TP 316/316L
ASTM TP 316/316L
(OP)
What does the Tp in ASTM TP 316/316L stand for?
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RE: ASTM TP 316/316L
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Cory
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RE: ASTM TP 316/316L
I dug out a few of the ASTM standards this morning and started looking a little deeper. ASTM A213 designated grades for seamless tube walls for Ferritic & Austenitic Alloy Boiler Superheater & Heat-Exchanger Tubes and ASTM A269 Seamless & Welded Austenitic SS Tubing for General Service both use TP (TP 316) in their material designations. I assume TP stands for "TubePipe".
The reason for this assumption was fortified when I reviewed ASTM 511 for Seamless Stainless Steel Mechanical Tubing which uses MT in their alloy designations (MT 316) and ASTM A276 Standard Specification for Stainless Steel Bars & Shapes uses no lettering in their alloy designations (316).
RE: ASTM TP 316/316L
RE: ASTM TP 316/316L
Further, use of TP has been discontinued as redundant in SS Grade specifying. see below.
Also, TP has never been used to designate Tubular Products of any other material (to my knowledge), although it would have been if it indeed indicated form.
From ASTM A312/A312M-03 Standard Specification for Seamless and Welded Austenitic Stainless Steel Pipes
"Note 1—When the impact test criterion for a low-temperature service would be 15 ft-lbf [20 J] energy absorption or 15 mils [0.38 mm] lateral expansion, some of the austenitic stainless steel grades covered by this specification are accepted by certain pressure vessel or piping codes without the necessity of making the actual test. For example, Grades TP304, TP304L, and TP347 are accepted by the ASME Pressure Vessel Code, Section VIII Division 1, and by the Chemical Plant and Refinery Piping Code, ANSI B31.3, for service at temperatures as low as -425oF [-250oC] without qualification by impact tests. Other AISI stainless steel grades..."
http://www.astm.org/cgi-bin/SoftCart.exe/DATABASE.CART/...
"Work Item Summary
Copyright 2003 ASTM International. All rights reserved.
WK1264 Standard Specification for Seamless and Welded Austenitic Stainless Steel Pipes
Work Item Type: Revision of A312/A312M-03
Developed by Subcommittee: A01.10
Date Initiated: 06-04-2003
1. Rationale
Drop TP from Grade Names as serving no purpose. {my emphasis} Was identified as 012T-9.
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Keywords
austenitic stainless steel; seamless steel pipe; stainless steel pipe; steel pipe; welded steel pipe; 23.040.10"
[pasted link didn't work. Go to www.astm.org and search for WK1264]