SS 904L pipe
UNS N08904 pipe for sulphuric and phosphoric acid plants, smelters and fertiliser units.
Specifications we supply
| Material | Seamless | Welded | Notes |
|---|---|---|---|
| 904L (N08904) | ASTM B677 | ASTM B673, B674 | Acid service |
| 254 SMO (S31254) | ASTM A312 | ASTM A358 | Chloride service |
Matching 904L components
We manufacture 904L flanges and fittings ourselves, so the whole acid line comes from one supplier.
Need pipe with flanges and fittings? Quote it as one package.
Send sizes, schedules, grades and lengths. One order, one set of certificates.
Pipe weight calculator
Weight per metre and per order, with OD and wall marked on the drawing.
Pipe weight calculator
Weight from ASME B36.10M / B36.19M dimensions and material density.
Plain-end weight, calculated. Mill weights vary within the tolerance of the pipe specification.
Lengths, documents and inspection
Lengths and ends
Single random (about 5–7 m) and double random (about 9–12 m) lengths, or cut to size. Plain or bevelled ends to ASME B16.25.
Documents
Mill test certificates to EN 10204 3.1 with every length, heat numbers matched to the pipe markings. IBR Form III-A for IBR pipe.
Inspection
- Certificate check against your order
- PMI on alloy pipe
- Third-party inspection for 3.2 certification on request
Packing
Bundled with end caps, stainless kept separate from carbon steel, seaworthy packing for export.
Matching flanges and fittings
We manufacture the flanges and fittings for these lines ourselves: Teshi Fittings for flanges and PipeFittings.co.in for butt-weld fittings. Send one BOQ for the whole line.
Questions buyers ask
Why is 904L used in acid plants?
Its copper and high nickel keep it passive in many sulphuric acid concentrations where 316L corrodes.
Get a quotation from the manufacturer
Send your BOQ, drawing or tender reference. You deal directly with the manufacturer.
- Reply from our estimation team, usually within one working day
- Carbon steel to titanium on one order
- EN 10204 3.1 or 3.2 certificates, third-party inspection welcome
- ISO 9001:2015 certified and IBR approved, since 1971
Drawings and BOQ spreadsheets are easiest by email. Mention your project name.