Stainless Steel Pipe Stock Range
One of the UK’s widest ranges of stainless steel pipe stock: grades 304L and 316L from 1/8″ to 30″ NB, seamless and welded, held in Blackburn and cut to the exact length you need.
Our stainless steel pipe stock
Choose a product to see every size, schedule and wall thickness we hold.
A312 Seamless Pipe
Seamless pipe with no weld seam, for higher-pressure and critical process lines.
1/8″–12″ NB · Sch 10S–XXS
A312 Welded Pipe
Cost-effective welded pipe for most low and medium-pressure duties.
3/8″–24″ NB · Sch 10S, 20, 40S
A358 Class 1 Welded Pipe
Double-welded, fully radiographed large-bore pipe for demanding service.
8″–30″ · Sch 10S–Sch 80
Hollow Bar
Thick-walled stainless hollow bar for machined parts. Supplied to order in approx. 5–10 days.
32–275mm OD · 304L, 316L, 1.4462
A wide range of stainless steel pipe stock, ready to cut
We specialise in one thing: stainless steel pipe. That focus lets us hold an unusually deep stock range, with more than 485 size, wall and grade combinations on the racks in Blackburn, from small-bore instrument pipe to 30″ large-bore welded pipe.
All of our stainless steel pipe stock is supplied with full mill certification and traceability, and as a member of the British Stainless Steel Association we work to recognised industry standards, and we cut to your exact length in-house, from a single short piece to a full 6 metre length. If a size isn’t in stock, our supplier network can usually source it quickly, and welded pipe can be bespoke manufactured to any size and wall thickness.
| Product | Standard | Grades | Sizes | Schedules | Origin |
|---|---|---|---|---|---|
| Seamless pipe | ASTM A312 | 304L, 316L | 1/8″–12″ NB | 10S, 40S, 80S, 120, 160, XXS | EU & Far East |
| Welded pipe | ASTM A312 | 304L, 316L | 3/8″–24″ NB | 10S, 20, 40S | Taiwan |
| Large-bore welded pipe | ASTM A358 Class 1 | 304L, 316L | 8″–30″ | 10S, 40S, 80S, Sch 80 | EU |
| End caps | ASTM A403 / ASME SA403 | 304L, 316L | 8″–24″ | 10S, 40S, 80S | EU |
Where stainless steel pipe is used
Stainless steel pipe combines strength, corrosion resistance and a long service life, which is why it is specified across so many industries. Our customers use it in:
Food, drink & dairy
Hygienic, easy-clean 304L and 316L pipe for process lines, CIP systems and breweries.
Pharmaceutical
Corrosion-resistant 316L for purified water, clean steam and process pipework.
Chemical & petrochemical
Seamless and A358 pipe for corrosive media, high temperatures and pressure.
Water & wastewater
Long-life pipe for treatment plants, pumping stations and desalination.
Oil, gas & energy
Pipework for process plant, power generation and renewable energy systems.
Marine & offshore
316L’s molybdenum content resists chloride pitting in salt-laden environments.
Construction & architecture
Structural sections, handrails, columns and architectural features.
Engineering & fabrication
Cut lengths for fabricators, machine builders and maintenance teams.
How stainless steel pipe is made
Seamless pipe
Seamless pipe starts as a solid round billet of stainless steel. The billet is heated and pierced through the centre to form a hollow shell, then rolled or extruded to size. Most seamless stainless pipe is then cold finished by pilgering or drawing for an accurate diameter and wall, before solution annealing and pickling to restore full corrosion resistance. With no weld seam, it is the usual choice for high-pressure and critical service.
Welded pipe
Welded pipe is made from stainless steel strip or coil, which is roll-formed into a tube and fused along its length, typically by TIG, plasma or laser welding. The weld is then worked and the pipe heat treated so the seam matches the parent metal as closely as possible. Welded pipe offers excellent value, consistent wall thickness and availability in large diameters.
Large-bore A358 pipe
For larger sizes, plate is rolled into a cylinder and joined by electric fusion welding with added filler metal. Under ASTM A358 Class 1, the seam is welded from both sides and fully radiographed, giving a high level of quality assurance for large-diameter process pipework.
Testing and certification
Finished pipe is tested to its standard, including hydrostatic or non-destructive testing, and marked with its grade, size, heat number and specification. We supply every order with the mill certificate, so you have full traceability from the melt to your cut length.
304L or 316L stainless steel pipe?
Both are low-carbon austenitic grades that weld well and resist corrosion. 304L is the cost-effective, general-purpose choice for most indoor and mildly corrosive applications. 316L adds molybdenum for better resistance to chlorides, acids and pitting, so it is preferred for marine, chemical, pharmaceutical and food processing duties. Not sure which you need? Ask our team or try our free PREN calculator.
Need stainless pipe cut to length?
Send us your sizes and quantities and we’ll confirm price, availability and lead time.