Mill forms
Seamless tube and pipe in nickel alloys, titanium, duplex and stainless steel
Pierced and cold rolled or cold drawn seamless tubing from 6 mm to 630 mm outside diameter, tested 100 % by hydrostatic or eddy current methods.
Dimensions and reference data
| Specification | Typical grades supplied | Size range | Primary use |
|---|---|---|---|
| ASTM B444 / B444M | Inconel 625 Gr.1 / Gr.2 | OD 6 – 630 mm | Process piping, seawater, sour service |
| ASTM B423 | Incoloy 825 | OD 6 – 406 mm | Acid lines, produced water, heat exchangers |
| ASTM B167 / B163 | Inconel 600 | OD 6 – 219 mm | Furnace tube, condenser and heater tube |
| ASTM B622 | Hastelloy C-276, C-22, B-3 | OD 6 – 324 mm | Chemical reactors, scrubbers, HCl service |
View all 8 rows
| Specification | Typical grades supplied | Size range | Primary use |
|---|---|---|---|
| ASTM B165 / B163 | Monel 400 | OD 6 – 219 mm | Marine and HF alkylation systems |
| ASTM B861 / B338 | Titanium Gr.2, Gr.5, Gr.7, Gr.12 | OD 6 – 324 mm | Desalination, chlorine, offshore |
| ASTM A312 / A213 | 316L, 321, 347, 904L, S31254 | OD 6 – 630 mm | General process and heat exchanger tube |
| ASTM A790 / A789 | Duplex 2205, Super duplex 2507 | OD 6 – 630 mm | Subsea, brine, high pressure membrane |
Sizes beyond the standard range and special heavy wall combinations can be produced against drawing; lead time and minimum quantity apply.
| Test | Typical standard | Acceptance basis | When required |
|---|---|---|---|
| Hydrostatic | ASTM B829 / applicable spec | No leakage at specified pressure | All pressure tube unless waived |
| Eddy current | ASTM E426 | Calibrated through-wall notch | Heat exchanger and instrumentation tube |
| Ultrasonic | ASTM E213 / E2375 | Reference notch of agreed depth | Heavy wall or critical service tube |
| Flattening / flare | ASTM B829 / applicable spec | No cracking to specified reduction | Per purchase order requirement |
| Intergranular corrosion | ASTM G28 Method A, ASTM A262 Practice E | Weight loss and bend acceptance | Stabilised and low carbon grades |
| Surface finish | Visual and roughness measurement | Pickled, bright annealed or polished Ra limits | Hygienic and nuclear applications |
Specifications and options
| Manufacturing route | Round billet, pierced, hot extruded or pilger cold rolled, cold drawn, annealed and straightened |
|---|---|
| Size range | Outside diameter 6 mm to 630 mm; wall thickness 0.5 mm upwards |
| Schedule coverage | ASME B36.19M Sch 5S, 10S, 40S, 80S, 160 and ASME B36.10M Sch 10 to XXS to order |
| Dimensional tolerance | To the applicable ASTM specification; tighter tolerances available on agreement |
| Lengths | Random 5 – 7 m or fixed cut lengths up to 12 m with square cut and deburred ends |
| Surface condition | Solution annealed and pickled, bright annealed, mechanically polished or bead blasted |
| Testing | 100 % hydrostatic or eddy current, plus tensile, flattening, flaring, hardness and corrosion tests |
| Marking | Specification, grade, size, heat number and manufacturer stencilled along the length |
| Certification | EN 10204 3.1 with full chemical analysis, mechanical properties, NDT result and heat treatment record |
Typical applications
- Shell and tube heat exchangers, condensers, evaporators and reboilers
- Chemical process piping for acids, solvents and halogenated streams
- Offshore seawater lift, firewater, cooling water and ballast systems
- Downhole tubing, coiled tubing strings and control line encapsulation
- Desalination reverse osmosis high pressure piping and brine recirculation
- Instrumentation and hydraulic tubing requiring clean, bright finished bore
- Nuclear, pharmaceutical and food grade hygienic process lines
How to order seamless tubes & pipes
Send us the following and we will return a quotation within 24 hours: alloy grade or UNS number, dimensions including schedule or wall thickness, governing material and dimensional standards, quantity, required heat treatment, non-destructive testing scope, certificate type and any third party inspection requirement.
Seamless Tubes & Pipes frequently asked questions
How do you prove seamless tube integrity?
Every length is hydrostatically tested or eddy current tested to the applicable ASTM acceptance level, and the test pressure or calibration notch is recorded. Ultrasonic testing can be added for heavy wall or high consequence applications.
Can you supply U-bent heat exchanger tubes?
Yes. Tubes can be delivered U-bent to your radius with stress relieving after bending, plus eddy current retesting of the bent section and a fluorescent penetrant check.
What is the difference between ASTM B163 and B167?
B163 covers seamless condenser and heat exchanger tube with tighter dimensional control for tube-to-tubesheet joints, while B167 covers general seamless pipe and tube for pressure and general service.
Do you supply tube with PMI verification?
Positive material identification is offered on 100 % of lengths or on a statistical basis using handheld XRF, with readings reported against the certified ladle analysis.
Can you match tight ovality requirements?
Cold pilgered tube holds significantly tighter ovality and wall variation than hot finished product. Where the design demands it we quote specifically to cold finished tolerances.
What is the standard delivery length?
Random lengths of roughly 5 to 7 metres are standard; fixed lengths up to about 12 metres are available, and longer can be agreed for specific grades and sizes.