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##WELDTRON-FORMTEILE##

##WELDTRON-ROHRE##

Specification weldtron

Material	Welded or seamless austenitic stainless steel tubes, depending on outer diameter (see dimensions). 1.4435 BN2/UNS S31603 (316L), ∂-Ferrite content of the basic material and longitudinal weld ≤ 0.5%. 1.4404/UNS S31603 (316L) UNS S31603 (316L)
Dimensions	Stock dimensions: Imperial: 1/4” (6.35 x 0.89 mm) to 6” (152.40 x 2.77 mm) ISO: 13.50 x 1.60 mm to 219.10 x 2.60 mm Metric: 6.00 x 1.00 mm to 154.00 x 2.00 mm Further dimensions on demand
Technical terms of delivery	Tubes: According to DIN11865 / 11866, ASTM A 269 / A 270 / DIN EN 10217-7 / DIN EN 10216-5 Length: 5900 - 6090 mm (max. 10% short lengths possible) Fittings: Tube components: Prematerial according to ASTM A 269 / A 270 / DIN EN 10217-7 / DIN EN 10216-5 Machined components: Prematerial according to ASTM A 479 / DIN EN 10088-3 / DIN 17440 Tolerances: According to ASTM A 269 / A 270, Pharmaceutical Tubes or DIN EN ISO 1127 / D4/T3 Ends: Tubes and fittings are prepared for orbital welding
Surface options	Tubes and Fittings: inner surface: bright finish (bf) H3: Ra ≤ 0,80 µm (32 μin) anodic clean (ac) H3: Ra ≤ 0,80 µm (16 μin) electropolished (ep) HE3*: Ra ≤ 0,60 µm (24 μin) outer surface: Ra ≤ 0,80 µm (32 μin) Fittings: a) Ra value in the cold worked area of fittings (inner and outer surface) as well as on the longitudinal weld seam of electropolished tubes and fittings is not defined b) Specified roughness of total surface available on request
Inner surface treatment	Tubes bf: Cleaning and test procedure ASTM A 632, S3 Tubes ac: Anodic cleaning procedure Spec. HE 175 3VNS Tubes ep: Electropolishing procedure Spec. HE 175 3VN Fittings bf: Cleaning and test procedure ASTM A 632, S3 Fittings ac: Anodic cleaning procedure Spec. HE 111 3VNS Fittings ep: Electropolishing procedure Spec. HE 111 3VN
Hardness	Max. 180 HV / 90 HRB
Test procedures	Verification of basic test certificate Verification of dimensions Visual control Roughness measurements Endoscopic inspection of bright finished tubes
Marking	Tubes Permanently marked Fittings Needle marking
Information	Heat number DOCKWEILER DW number Material Dimensions
Documentation	Inspection certificate 3.1 according to DIN EN 10204 for the prematerial
Packing and delivery	Bright finished tubes and fittings are closed with transparent PE caps (anodic clean and electropolished tubes and fittings with PE/PA squares), sleeved and sealed in PE and marked with a white sticker „Weldtron“. Electropolished tubes and fittings are closed with yellow PE caps and marked with a white sticker “Weldtron ep“. Delivery of tubes in tubular container or wooden crate, fittings in strong cardboard box with shock-absorbing filler.

* Hygienic class acc. to DIN 11866 / 11865 / 11864

Weldtron Surfaces

Inner surfaces

weldtron – a welded stainless steel tube system, with a smoothed weld bead, supplied in the alloys TP316L/TP316/1.4404/1.4435/BN2, available with surfaces in bright finish, anodic clean and electropolished

Bright finish

welded with smooth weld bead.
Ra ≤ 0.80 µm/32 µin

Anodic cleaned

Anodic cleaned in accordance with specification HE 175 3VNS (tubes) and HE 111 3VNS (fittings)

Ra ≤ 0.80 µm/32 µin.

Anodic cleaning does not alter the roughness of the inner surface

Characteristics/Advantages:
The specially developed cleaning process removes 3-5µm from the surface – and with it any remnants of the annealing process and other potential contamination. For the user this means a surface free of particles including the welds.

Elektropolished

Electropolished in accordance with HE 175 4VN (tubes) and HE 111 4VN (fittings)

Ra ≤ 0.60 µm/24 µin

Safetron Elektropoliert

Characteristics/Advantages:
Reduction of the surface area, the closed chromium oxide layer optimizes the corrosion resistance and welding characteristics, no catalytic reaction with the medium.

Outer surface

Outer surface: Ra ≤ 0.80 µm/32 µin

Additional information

Surface treatment of tubes

Literature

Markets and Applications

Pharmaceuticals / Biotechnology

Production and filling of fluids, for instance: WFI, Parenteralia

More information

Surface Treatment

Dockweiler tube systems are treated according specified procedures in order that the high quality standards of inner surfaces is met constantly.

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Melting Process and Manufacturing

Our products are strictly controlled to meet the highest quality requirements.

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