ISO/EN seamless stainless steel tubes is manufactured according to ISO/EN standards, which also includes a wide range of sizes in duplex and super-duplex stainless steels grades.
1) Standard
EN/ISO seamless stainless steel tubing is available according to below standards, also customer’s requirements.
– EN 10216-5 TC1 / TC2
– EN 10297-2
– PED 97/23/EC, AD 2000
2) Steel Grades
Austenitic stainless steel grades: 1.4301/1.4307, 1.4401/1.4404, 1.4541/1.4878, 1.4571, 1.4948
Duplex / super duplex stainless steel grades: 1.4462, 1.4410, 1.4539
3) Delivery condition
Seamless stainless steel tubes mainly are delivered in below conditions:
– Bright annealed,
– Solution annealed and pickled,
– Annealed and Polished
4) Size Range
Ruimai can produce seamless stainless steel tubes in a wide size range as below:
Outer Diameter: 3 mm to 508 mm;
Wall thickness: 0.5 mm – 40 mm
5) Tolerances
EN/ISO seamless stainless steel tubing usually is following the below requirements and the customer’s requests.
| Tolerances according to EN ISO 1127 | ||
| Condition | Outside diameter | Wall thickness |
| Cold-worked | +/-0.75%, but min. | +/-10%, but min. |
| Cold-worked | +/- 0.3 mm (D3) | +/- 0.2 mm (T3) |
| Cold-worked | +/- 0.5% (D4) | +/- 7.5% (T4) |
EN/ISO Standard seamless stainless steel tubes are supplied as:
| Stainless steel heat exchanger tubes
Stainless Steel Hydraulic Tubing Stainless steel instrument tubing Stainless steel boiler tubes Line pipes / Flowline pipe Stainless steel precision tubes |
High temperature tubes /Furnace tubes
Duplex /super duplex steel pipes Seamless Coiled tubes Stainless steel capillary tubes Stainless steel bright annealed tube Stainless steel U-bend pipes |