Interpretting Old Pipe Stencils
Interpretting Old Pipe Stencils
(OP)
I need help interpretting old pipe stencils. We recently uncovered a lateral laid in the 60s and found the stencil detailing the pipe specs. The stencil read as follows:
4 1/2OD 188WALL EB5 ON J1745 LOT 1033 (possbily 1088)
The stencil repeated over and over along the joint. Clearly its 4.5", 188 wt but what does the rest of the stencil mean? Any chance there is a pipe grade somewhere in there?
4 1/2OD 188WALL EB5 ON J1745 LOT 1033 (possbily 1088)
The stencil repeated over and over along the joint. Clearly its 4.5", 188 wt but what does the rest of the stencil mean? Any chance there is a pipe grade somewhere in there?





RE: Interpretting Old Pipe Stencils
RE: Interpretting Old Pipe Stencils
The pipe is used in what type system?
Are you sure of the installation date.
RE: Interpretting Old Pipe Stencils
Consolation prize is with that diameter you'll probably not be needing too much and the unknown pipe grade clause will suffice.
Let your acquaintances be many, but your advisors one in a thousand' ... Book of Ecclesiasticus
RE: Interpretting Old Pipe Stencils
So that is (er, used to be) a 4 inch pipe, schedule 30. Material? Probably need to sample. If you need to replace any part of this pipe, upgrade to a Sch40 or Sch 80 wall thickness.
Look back in the plat's construction archives and P&ID's for a "system" or fluid spec for "EB5.
RE: Interpretting Old Pipe Stencils
BigInch- For years that's what our records have indicated... unknown grade. The DOT allowable assumed grade of 24,000 has always been acceptable, but with the PHMSA bulletins released recently it looks as if regulations will require all records on the line.
racookpe1978- I will take a look to see any spec for EB5. Google has revealed nothing so far.
RE: Interpretting Old Pipe Stencils
When we built plants in that era, there would be a master list of the fluids and systems and pressures and, with each fluid or system, a list "approved" materials and pipe schedules and fitting spec's (150 lb, 300 lb, 300 lb), and joint type: BW, threaded, socket-welded, slip-on, etc, etc.
Each system - in the plant drawings and spec lists I've used to "rebuild" hundreds of pipes back into CAD from paper copies - had an abbreviation or code or letter-number combination unique to that plant or that contractor (AE firm) or region. And I think that arbitrary letter-number combination is what you are reading. But on Google? Nah. No reason to think it would ever get digitized.
RE: Interpretting Old Pipe Stencils
RE: Interpretting Old Pipe Stencils
RE: Interpretting Old Pipe Stencils
Let your acquaintances be many, but your advisors one in a thousand' ... Book of Ecclesiasticus
RE: Interpretting Old Pipe Stencils
So if you have any potential problem it is in the weld. Grade "B" did not require seam HT; all "X" grades did. Somebody wrote a record (with pen and paper - NOT on goggle or facebook, etc), you might find them if it is important. When I worked at Amoco we could get records back to WW 1 pipelines; I am sure BP has disposed of all these records (you may be in a similar situation).
If you can trace it to a Japanese mfgr, the HT and NDE was good, if made in USA- not good, (except LSS which would have welded it as 6.5" and reduced to 4.5").
RE: Interpretting Old Pipe Stencils
Let your acquaintances be many, but your advisors one in a thousand' ... Book of Ecclesiasticus
RE: Interpretting Old Pipe Stencils
RE: Interpretting Old Pipe Stencils
Let your acquaintances be many, but your advisors one in a thousand' ... Book of Ecclesiasticus
RE: Interpretting Old Pipe Stencils
There is a 4 1/2" pipe with an OD of 5.0" that shows no Sch 20, only Sch 40 and 80.
I checked with my piping buddy who stated he had seen 4" ERW but had no clue as to the manufacturer or origin.
RE: Interpretting Old Pipe Stencils
RE: Interpretting Old Pipe Stencils
If the ERW weld has a very tall narrow "hourglass" shape HAZ, it is not recrystalized; recrystalized will have a second half circle shaped HAZ coming in from the OD.
Pardon my excessive discussion; I went around with the mfgrs on the subject for years. Most other API users said "we don't care what you do with ERW, we are only going to use seamless for important service".
Big inch; I almost remember looking at 1" or 1.5" ERW exchanger tubing for ASTM A210 compliance.
RE: Interpretting Old Pipe Stencils
Let your acquaintances be many, but your advisors one in a thousand' ... Book of Ecclesiasticus
RE: Interpretting Old Pipe Stencils
Alternatively, hydro it at 1.5 x the proposed PRV setting, or 2 x the working pressure. Strongly recommend hydro vs. penumatic. If pnematic is used, evacuate every foot of the line being tested, as there will be a major risk of death and/or dismemberment. You have a 'scary' line, that may be like the one in California that went BOOM.