Steel Pipes
Pipes Carbon Steel for Pressure Service STPG
Pipes Carbon Steel for Pressure Service STPG is a group of 88 IMPA-coded items (codes 710201–710297) under Steel Pipes in the Pipes & Tubes section (IMPA 71). All of them are priced per lgh. Every item in the list is carbon steel. The list runs through imperial sizes from 1" to 80-3/4".
Buying guide
STPG is carbon steel pipe for pressure service to JIS G 3454, the standard pressure pipe of Japanese-built engine rooms. The group lists electric-resistance-welded (ERW) pipe in Schedule 40 and Schedule 80, from 1/8 inch (6A) upward, supplied in 5.5 m lengths.[1]
It is used for fuel, lube-oil, steam, condensate and compressed-air lines. The chief engineer raises it for pipe renewals found at survey or after leaks, usually with matching schedule fittings and flanges.
How to specify it
State the standard (JIS G 3454, STPG), manufacturing type (seamless or ERW), schedule, nominal size in A or inch and the number of lengths. Black (ungalvanised) pipe is the default; say so if you need galvanised.[1]
Check the service before ordering. JIS G 3454 covers pipe for pressure service up to about 350 °C and does not cover high-pressure service; for high pressure at 350 °C or lower, JIS G 3455 (STS) applies.[1][2]
Rules and certificates
Questions buyers ask
- STPG or SGP?
- SGP is ordinary piping pipe for low pressures; STPG (JIS G 3454) is for pressure service up to about 350 °C. Use STPG for oil, steam and air systems unless the drawing says otherwise.
- When do I need STS instead of STPG?
- For high pressure service: JIS G 3454 excludes it, and JIS G 3455 (STS) covers it at 350 °C or lower.
Sources
Published by Sherif Awad, founder of GeoMarineHub — in ship supply since 1990, a family business since 1981 (45 years). Last checked .
At a glance
Part of Pipes & Tubes (IMPA section 71): Steel, stainless, copper and PVC pipe and tube by nominal bore, schedule and length.
It is one of 7 groups under Steel Pipes; the others include Pipes Carbon Steel High Pressure Service STS, Pipes Carbon Steel High Temperature Service STPT, Pipes Carbon Steel for Ordinary Piping Galvanized SGP, Pipes Carbon Steel for Ordinary Piping Ungalvanized SGP, Pipes Steel Low Temperature Service STPL and 1 more.
Post the ones you need as a requirement and verified suppliers activated at your port bid on them — sealed, so nobody sees another bid.
- Items
- 88
- IMPA codes
- 710201–710297
- Priced
- per lgh
- Materials
- carbon steel
- Sizes
- 1" – 80-3/4"
Items
Also under Steel Pipes
Most requested sections