Welded

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TRIS produces welded tubes of precise specifications through the welding-cold drawing-degreasing-BA heat treatment process. The cold drawing processing using external dies and internal plugs. These procedures dramatically overcome weaknesses of weld beads, making it possible to produce precise tubes of various purposes. We have supplied 1,000,000 meters for medical, petrochemical, and mechanical purposes. Our welded tubes are available in coils or straight tubes to meet customer's needs

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Item Size Standard Grade Extra Grade

O.D.

(Outside Diameter)

2.5mm~50.8mm

(0.098"~2“)

2.5~3.0(0.0984~0.1181)

-0, +0.050(±0.0020)

±0.025(±0.0010)

3.1~6.0(0.122~0.236)

-0, +0.080(±0.0032)

±0.025(±0.0010)

6.1~10.0(0.240~0.393)

-0, +0.080(±0.0032)

±0.025(±0.0010)

10.1~15.0(0.398~0.591)

±0.13(±0.005)

±0.05(±0.002)

15.1~20.0(0.594~0.787

±0.13(±0.005)

±0.05(±0.002)

20.1~50.8(0.791~2.000)

±0.13(±0.005)

±0.05(±0.002)

W.T.

(Wall Thickness)

0.15mm~3.0mm

(0.006”~0.12“)

0.15~0.3(0.006~0.012)

±10%

-0, +10%

0.15~0.3(0.006~0.012)

±10%

-0, +10%

0.71~1.0(0.028~0.039)

±10%

-0, +10%

1.01~1.5(0.040~0.059)

±10%

-0, +10%

1.51~3.0(0.059~0.12

±10%

-0, +10%

Length

1,000~6,100(4~20ft)

+10, -0/(+0.4, -0)

 

Straightness

Straight Tubing

2mm/M

1mm/M

Hardness (HV)

Annealed

220 max, 2000max in soils

±0.015(±0.0006)

Not Annealed

270 min

±0.015(±0.0006)

Specified Hardness

±15%

-0, +10%

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