Cold rolled Stainless Steel strips are welded into tubes in the state of the art tube mills under fully automated precision process.

 

The manufacturing of pipes begins with slitting of strips of required width based on the diameter of the tubes to be formed. Stainless steel slitted strips are passed through a series of rollers and tubes are formed automatically on different stands with rolls and welded on fully automated process of TIG welding without the addition of filler metals. The welding head line is polished continuously with the help of automatic bead polishing machine to produce a perfect bore. The tubes are then passed through a series of sizing rolls to ensure ovality and tolerances. Tubes are then cut to length, Cold-drawn, solution annealed, Straightened, Pickled, passivated and polished before other Destructive and Non-destructive Testing & Despatch.

 

Stainless Steel Pipe (welded) 10″ NB to 24″ NB. in schedule 5, Schedule 10, Schedule 20, Schedule 40 and also special wall thickness is formed on 800 M.T. Press Brakes Hydraulic Press in lenght upto 6.0 to 7.0 meters. This section produces S.S. pipes (welded) as per ASTM A-358 by TIG welding and filler materials is used. The large diameter pipe is then sized & straightened to meet ovality and dimensional requirements of the applicable specifications. Testing, according to specifications, is then performed by either X-ray or Hydrostatic method. Final marking to size, grade & specifications is done prior to final visual inspection before despatch.

 

Chemical, Physical and Hydrostatic Testing is done regularly since input raw materials are taken into the factory and during processing till dispatching of finished product.

 

SIZE RANGE

OD: 6.0 mm OD to 219.08 mm OD

Thickness: 0.5mm THK to 6.00 mm THK

Length: As per customer requirements.

Grade: AISI – 304, 304L, 316, 316L, 316TI, 321, 310

DIN-I, 430I, I.4306, I.440I, I.4404, and also it’s equivalents in NFA, Jis standards.

Specification: International standard, ASTM, ASME-A213, A249, A269, A312, A688, and DIN, NFA, and Jis standard.

Nominal Pipe Size Outside Diameter Schedule 5 S Schedule 10 S Schedule 20 S Schedule 40 S Schedule 80 S Schedule 160 S XXS
mm inch mm WT mm WEIGHT (KGM) WT mm WEIGHT (KGM) WT mm WEIGHT (KGM) WT mm WEIGHT (KGM) WT mm WEIGHT (KGM) WT mm WEIGHT (KGM) WT mm WEIGHT (KGM)
3 1/8. 10.3 1.2 0.2 1.24 0.28 1.5 0.33 1.73 0.37 2.41 0.47 – – – –
6 1/4. 13.7 1.2 0.37 1.65 0.49 2 0.58 2.24 0.63 3.02 0.8 – – – –
10 3/8. 17.1 1.2 0.47 1.65 0.63 2 0.74 2.31 0.84 3.2 1.1 – – – –
15 1/2. 21.3 1.65 0.8 2.11 1 2.3 1.07 2.77 1.27 3.73 1.62 4.75 1.94 7.47 2.55
20 3/4. 26.7 1.65 1.03 2.11 1.28 2.55 1.52 2.87 1.69 3.91 2.2 5.56 2.9 7.82 3.64
25 1 33.4 1.65 1.3 2.77 2.09 2.55 1.94 3.38 2.5 4.55 3.24 6.35 4.24 9.09 5.45
32 1.1/4 42.2 1.65 1.65 2.77 2.7 3 2.9 3.56 3.39 4.85 4.47 6.35 5.61 9.7 7.77
40 1.1/2 48.3 1.65 1.91 2.77 3.11 3 3.55 3.68 4.05 5.08 5.41 7.14 7.25 11.1 10.18
50 2 60.3 1.65 2.4 2.77 3.93 3 4.24 3.91 5.44 5.54 7.48 8.74 11.11 11.07 13.44
65 2.1/2 73 2.11 3.69 3.05 5.26 4 6.81 5.16 8.63 7.01 11.41 9.53 14.91 14.02 20.39
80 3 88.9 2.11 4.51 3.05 6.45 4 8.37 5.49 11.29 7.62 15.27 11.1 21.3 15.24 27.68
100 4 114.3 2.11 5.84 3.05 8.36 4.5 12.18 6.02 16.07 8.56 22.32 13.49 33.54 17.12 41.03
125 5 141.3 2.77 9.47 3.4 11.57 5 16.8 6.55 21.8 9.53 30.97 15.88 49.11 19.05 57.43
150 6 168.3 2.77 11.32 3.4 13.84 6.35 25.36 7.11 28.26 10.97 42.56 18.25 67.53 21.95 79.22
200 8 219.1 2.77 14.79 3.76 19.96 6.35 33.31 8.18 42.55 12.7 64.64 23.01 111.27 22.23 107.92
250 10 273.1 3.4 22.63 4.19 27.78 6.35 41.77 9.27 60.31 12.7 96.01 28.58 172.33 25.4 155.15
300 12 323.8 3.96 31.25 4.57 36 6.35 49.7 9.53 73.88 12.7 132.05 33.32 238.76 25.4 186.97
350 14 355.6 3.96 34.36 4.78 41.3 7.92 67.8 11.13 94.59 ASTM A 312 TP 304
400 16 406.4 4.19 41.56 4.78 47.29 7.92 77.83 12.7 123.3 ASTM A 312 TP 316L
450 18 457.2 4.19 46.81 4.78 53.26 7.92 87.71 14.27 155.8 ASTM A 312 TP 317L
500 20 508 4.78 59.25 5.54 68.61 9.53 117.14 15.09 183.42  
600 24 610.0s 5.54s 82.47 6.35 94.45 9.53 141.12 17.48 255.41