Fine-grain & low-temperature pipes
We supply fine-grain and low-temperature-tough steel pipes to EN 10216-3, EN 10216-4 and ASTM A333, in grades such as P355NL1, P265NL and 12Ni14, together with matching fittings and flanges. These steels combine higher strength with good toughness, and the NL, QL and nickel-alloyed grades keep their impact energy at low temperature. They are used in pressure vessels, refrigeration, LPG and LNG facilities and chemical lines operating in cold environments.
- Sourced direct from manufacturers
- No minimum order quantity
- The complete package in one quote
Specification
- Outside diameter
- 10,3 – 711 mm
- Wall thickness
- 1,73 – 59,54 mm
Material and standards
- Standards
- EN 10216-3 · EN 10216-4 · ASTM A333
- Material grades
- P355NH · P355NL1 · P460NL1 · P265NL · 12Ni14 · A333 Gr.6
Overview
- EN 10216-3: P275NL1/NL2, P355N/NH/NL1/NL2, P460N/NH/NL1/NL2.
- EN 10216-4: P215NL, P255QL, P265NL, 12Ni14.
- ASTM A333: Gr. 3 and Gr. 6.
What are they for?
Fine-grain steels combine higher strength with good toughness. The "NL" and "QL" grades, and the nickel-alloyed grades, keep their impact energy at low temperature. That is why they are used in:
- pressure vessels;
- refrigeration;
- LPG and LNG facilities;
- chemical lines operating in cold environments.
The complete low-temperature line
At low temperature every component of the line matters.
- Fittings: P355NL1 or ASTM A420 WPL6.
- Flanges: P355NL1, ASTM A350 LF2 / LF3, and X8Ni9 for cryogenic systems.
- Bolting: in material suited to the temperature.
What to include in your RFQ:
- grade;
- minimum design temperature;
- impact-test temperature and value, if specified;
- size;
- certificate.
Frequently asked questions
What is the difference between P355NH and P355NL1?
"NH" is optimised for elevated temperature and "NL1" for low-temperature service, with different impact-test requirements.
Size table
| DN | NPS | OD (mm) | Wall (mm) |
|---|---|---|---|
| – | – | 10,3–13,7 | 1,73–3,02 |
| DN10 | ⅜" | 17,2 | 1,8–3,2 |
| DN15 | ½" | 21,3 | 2–7,47 |
| DN20 | ¾" | 26,9 | 2,11–7,82 |
| DN25 | 1" | 33,7 | 2,6–9,09 |
| DN32 | 1¼" | 42,4 | 2,6–9,7 |
| DN40 | 1½" | 48,3 | 2,6–10,15 |
| DN50 | 2" | 60,3 | 2,77–11,07 |
| DN65 | 2½" | 76,1 | 2,9–10 |
| DN80 | 3" | 88,9 | 3,05–15,24 |
| DN100 | 4" | 114,3 | 3,05–17,12 |
| DN125 | 5" | 139,7 | 3,4–19,05 |
| DN150 | 6" | 168,3 | 3,4–21,95 |
| DN200 | 8" | 219,1 | 3,76–23,01 |
| DN250 | 10" | 273 | 4,19–28,58 |
| DN300 | 12" | 323,9 | 4,57–33,32 |
| DN350 | 14" | 355,6 | 6,35–35,71 |
| DN400 | 16" | 406,4 | 6,35–40,49 |
| DN450 | 18" | 457 | 6,35–45,24 |
| DN500 | 20" | 508 | 6,35–50,01 |
| DN600 | 24" | 610 | 6,35–59,54 |
| DN700 | 28" | 711 | 8,8–30 |
2 further non-DN outside diameters (73–559 mm), e.g. inch and precision sizes.
Typically available from stock. Other sizes on request.
Listed items show the typical range; we also quote custom specifications.
Send us your material list – one quote for the complete package (pipe, fittings, flanges, gaskets, bolting), sourced direct from manufacturers, no minimum order.
Request a quote