Tube longitudinal seam welded

Comparison of the design types old DIN vs. new EN standard

DINENTypeSurface
1745510296-2Tubes without special requirements
1745710217-7Tubes for pressure purposesmetallic clean
PK1TC1Test category 1 (without AD2000/W2)metallic clean
PK2TC2Test category 2 (with AD2000/W2)metallic clean
d0W0Welded tubes, not pickled, from heat stripmetallic clean
d0gW0bWelded tubes, not pickled, from heat strip, smooth inseammetallic clean
d1W1Welded tubes, pickled, from heat sripmetallic clean
d1gW1bWelded tubes, pickled, from heat strip, smooth inseammetallic clean
d2W1AWelded tubes, heat treated, pickled, from heat stripmetallic clean
d2gW1AbWelded tubes, heat treated, pickled, from heat strip smooth inseammetallic clean
d3W1RWelded tubes, bright annealed, from heat stripmetallic clean
d3gW1RbWelded tubes, bright annealed from heat strip, smooth inseammetallic clean
k0W0Welded tubes, not pickled, from cold stripmetallic clean, smoother than d0
k0gW0bWelded tubes, not pickled, from cold strip, smooth inseammetallic clean, smoother than d0
k1W2Welded tubes, not pickled, from cold stripmetallic clean, smoother than d1 to d3
k1gW2bWelded tubes, not pickled, from cold strip, smooth inseammetallic bright, smoother than d1 bis d3
k2W2AWelded tubes, heat treated, pickled, from cold stripmetallic bright, smoother than d1 bis d3
k2gW2AbWelded tubes, heat treated, pickled, from cold strip, smooth inseammetallic bright, smoother than d1 bis d3
k3W2RWelded tubes, bright annealed, from cold stripmetallic bright, smoother than d1 bis d3
k3gW2RbWelded tubes, bright annealed, from cold strip, smooth inseammetallic bright, smoother than d1 bis d3
10noneWelded tubes, heat treated, pickled or bright annealed, from cold stripmetallic bright, smoother than d1 bis d3
11WCAWelded tubes, heat treated, at least 20% cold formed, Weld seam recrystallised, from warm or cold stripmetallic bright, weld barely recognisable
12WCRWelded tubes, heat treated, at least 20% cold formed, Weld seam recrystallised, from warm or cold strip, smooth inseammetallic bright, weld barely recognisable
oWGground
pWPpolished
gbsmoothed seam
Sep 1410246-3Eddy current testing in line
Sep 2510246-2Eddy current testing offline
10246-710246-7Ultrasonic examination
10246-9Ultrasonic examination
10246-1X-ray examination
10028-7Flat products pressure vessel steels
10088Stainless steel materials
3651-2Examination for inter-crystalline corrosion

 

 

Tolerances

StandardOuter DiameterWall Thickness
EN ISO 1127D1=+/- 1,50%, mind. +/- 0,75 mm
D2=+/- 1,00%, mind. +/- 0,50 mm
D3=+/- 0,75%, mind. +/- 0,30 mm
D4=+/- 0,50%, mind. +/- 0,10 mm
T1 = +/-15,0%, mind. +/-0,60mm
T2 = +/-12,5%, mind. +/-0,40mm
T3 = +/-10,0%, mind. +/-0,20mm
T4 = +/-  7,5%, mind. +/-0,15mm
ASTM A 312≤ 48,26 mm + 0,40/-0,79 mm
>48,26 ≤ 114,30 mm + 0,79/-0,79 mm
>114,30 ≤ 219,08 mm + 1,59/-0,79 mm