Specification weldtron

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)

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

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

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

• 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

• Verification of basic test certificate
• Verification of dimensions
• Visual control
• Roughness measurements
• Endoscopic inspection of bright finished tubes

Tubes Permanently marked
Fittings Needle marking

• Heat number
• DOCKWEILER
• DW number
• Material
• Dimensions

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.