Definition of ASME codes for pipe tube forgings

[brianle]

Where in the ASME code are the abbreviations for pipe, tube, and forgings ("P" "T" and "F") defined, i.e. SA-213 T-22, A-182 F-22?

Thanks,

Brian

 

[metengr]

They are designations that originated from ASTM, and are assigned based on the scope statement in the material specification.

 

[brianle]

Thanks metengr. I was wondering if there was someplace in the code where it says that P stands for pipe, T for tube, and F for forging.

 

[donf]

Brian,

Don't have the reference source at hand. (When I find it, I'll reply again). The designators have to do with the form or method of manufacture of the particular component. Here are some examples:

A312 TP304 TP = tubular product
A403 WP304 WP = wrought product
A351 CF8M C = casting
A182 F304 F = forging

regards,

donf

 

[metengr]

WP is welded pipe not wrough product.
TP is tube/pipe

 

[Kiwi2671]

metengr,
With all due respect I have to disagree.
I cannot find anything that definitively lists the meaning of WP or TP but I am positive it is not "Welded Pipe"
ASME IX lists all WP... as "Wrought Piping Fittings"
The Spec that donf has quoted A403 WP 304 states that WP grades have 4 Classes
TABLE 1
Fitting Classes for WP Grades
Class Construction Nondestructive Examination
S Seamless None
W Welded Radiography or Ultrasonic
WX Welded Radiography
WU Welded Ultrasonic

As for TP another spec donf has listed is A312 TP 304.
Note 2 states this spec "is the direct responsibility of Subcommittee A01.10 on Stainless and Alloy Steel Tubular Products"

Again, cannot find anything describing the exact meaning of TP.
Regards,
Kiwi

 

[metengr]

Kiwi2671;
That’s OK, I have had people disagree with me before so I might as was well supply a reference to support my posiyion.
The book below was written by an esteemed colleague that was directly involved with ASME Section II;

CASTI Guide Book, ASME Section II

you might find this excerpt interesting in Chapter 9

List of Abbreviations on page 189

WP - WELDED PIPE

W does not mean wrought it is used by ASME Section II as WELDED. For example SA 217 WCB, why in the word would “W” mean wrought when this is a cast product form.

 

[jte]

Ok, metengr... I'll bite: In WCB, what does the B stand for?

jt

 

[JLSeagull]

Perhaps the B is just a sequence. Within ASTM A 216 there are three grades: WCA, WCB and WCC.

 

[metengr]

Grades for the SA 216, (217 specification contains alloy grades) are for carbon content maximums and strength level

Grade WCA (weldable, cast, Grade A) 0.025% by mass
Grade WCB " ", Grade B) 0.030% by mass

Grade WCA UTS 60-85 Ksi
Grade WCB UTS 70-95 Ksi

 

[Kiwi2671]

metengr,
I agree with you that the W in WCA does not mean wrought.
It is WP I am trying to get my head around.

"Designation: A 403/A 403M – 01 An American National Standard
Standard Specification for
Wrought Austenitic Stainless Steel Piping Fittings1
This standard is issued under the fixed designation A 403/A 403M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1 This specification covers wrought stainless steel fittings
for pressure piping applications.2
1.2 Several grades of austenitic stainless steel alloys are
included in this specification Grades are designated with a
prefix, WP or CR, based on the applicable ASME or MSS
dimensional and rating standards, respectively.
1.3 For each of the WP stainless grades, several classes of
fittings are covered, to indicate whether seamless or welded
construction was utilized."

Clause 1.3 is the interesting one.

"6.1.2 Seamless (SML) pipe shall be made by a process that
does not involve welding at any stage of production."

How can WP stand for Welded Pipe if it is Seamless ?

Regards,
Kiwi

 

[metengr]

Kiwi;
In the above example, WP to me is weldable grade pipe, similar to weldable grade castings. Wrought is too broad of a definition.

After my review of the above specification, I believe WP is still weldable pipe

see the excerpt below from ASTM A 430

Several grades of austenitic stainless steel alloys are
included in this specification Grades are designated with a
prefix, WP or CR, based on the applicable ANSI or MSS
dimensional and rating standards, respectively.
1.3 For each of the WP stainless grades, several classes of
fittings are covered, to indicate whether seamless or welded
construction was utilized.

.....Table 1 is a general
summary of the fitting classes applicable to all WP grades of
stainless steel covered by this specification. There are no
classes for the CR grades. Specific requirements are covered
elsewhere.

CR refers to cold rolled, not weldable.

 

[rmw]

metengr,

Are you currently on any ASME committees, and if yes, which one(s)? And if no, which one(s) might you have been on previously?

rmw

 

[metengr]

rmw;
Yes, I am. BPV I, and several SG's under I. Why do you ask?

 

[jte]

... and how does metengr's committee affiliation status relate to this thread?

 

[rmw]

I asked because I had thought that I had read in some threads somewhere in the past that you were or had been on some ASME committee, and I wondered if I had remembered correctly, and if I had, if you still were. Just curiosity.

jte,

I started wondering about this as a reaction to some of the responses to metengr's information earlier in the thread. This thread is about the code, and if a member of the forum is posting this type of information, and has that kind of background it gets into the realm of what we call "horses mouth" where I come from. I'm pretty prone to arguing with people, but I long ago learned not to argue with experts in their field of expertise.

Why do you ask about my asking?

Metengr, the "horses mouth" comment wasn't meant to be derogatory... that would be a different word down here.

rmw

 

[metengr]

rmw;
I appreciate your candid and informative responses on this web site from a Power industry perspective, as myself. I would hope our paths would cross in one of the Codes and Standards meetings along with jte and TGS4 and stanweld.

Best Regards

 

[TJOrlowski]

So the position is that in the below examples:

12" Std. weight A-403 WP304L weldcap

the WP stands for welded pipe?

Why in the world would WP stand for welded pipe, when this is a wrought product?

-TJ Orlowski

 

[Kiwi2671]

metengr,
Weldable Pipe (or even maybe Weldable Product) is definitely plausible.
The point I was trying to make was I did not feel it could possibly be Welded Pipe (as per CASTI Guide to Section II) if one of the WP sub classes was seamless.
This is the closest I can find (after a fair bit of research)in maybe explaining it.

"Butt Welding Fittings conforming to the requirements of ASTM specifications A234, A403, A420, B361, B363 and B366 shall use marking symbols consisting of the prefix 'WP" added to the ASTM-specified grade identification symbol.
Examples: WPB, WP304, WPL6, WP6061, WPT1."

Five of the six specifications noted above are for Wrought Products but B363 throws a spanner in the works because it is not applicable to wrought products.
It is strange that there is so little information available on the internet regarding what these symbols actually mean.
Regards,
Kiwi