Stainless Steel Pipe

Stainless Welded Steel Pipe

Size:

Outside Diameter:  2" - 48"

Wall Thickness: 5s, 10s, std, xh, 40, 80, 100, 120, 160, xxh

Length: Single random, double random, cut length max to 23m

Standard:
ASTM A312/A1016/A269/A268/A789/A632/A250/A270/A358/A688/A814/A409
EN10216/EN10297/JIS G3448/G3459/G3463
Grades:
200 series: 201,202.204cu.
300series: 301,302,304,304cu,303,303se,304l,305,307,308,308l,309,309s,310,310s,316,316l,321.
400 series: 410,420,430,420j2,439,409,430s,444,431,441,446,440a,440b,440c.
Duplex and others:2205,904l,s31803,330,660,630,17-4ph,631,17-7ph,2507,f51,s31254 etc.
Application:

In chemical industry, coal, oil field open machine, building materials heat-resistant parts

Surface: 

Annealed, pickling, polished

Packing: 

Waterproof paper wrapped, packed in wooden cabins

Specification

Stainless steel welded pipe is corrosion resistant and this type of material is extremely durable in harsh conditions. This type of pipe is popular in industrial applications in the following industries:
Chemical, Food and beverage, Marine, Mining, Oil and gas, Pharmaceutical, Petrochemical, Power generation, Renewable energy, offshore engineering, ship building, paper industry, water treatment, HAVC system, boilers, heat exchangers, Aviation, funiture, OEM, Construction, Sanitary and etc.


Advantages:

1. Cost effective alternative to seamless
2. Special designed, excellent apperance
3. High dimensional accuracy
4. Outstanding corrosion resistance
5. Good durability


Size

Outside Diameter:  2" - 48"

Wall Thickness: 5S, 10S, STD, XH, 40, 80, 100, 120, 160, XXH

Standard

ASTMA312/A1016/A269/A268/A789/A632/A250/A270/A358/A688/A814/A409

EN10216/EN10297/JIS G3448/G3459/G3463

Grades

200 series:201,202.204Cu.

300series:301,302,304,304Cu,303,303Se,304L,305,307,308,308L,309,309S,310,310S,316,316L,321.

400 series:410,420,430,420J2,439,409,430S,444,431,441,446,440A,440B,440C.

Duplex and Others:2205,904L,S31803,330,660,630,17-4PH,631,17-7PH,2507,F51,S31254 etc.

Application

In Chemical Industry, Coal, Oil Field Open Machine, Building Materials Heat-resistant Parts


Available Welded Stainless Steel Pipe Grades:

Product Name

Executive Standard

Dimension

Steel Code / Steel Grade

Industrial Pipes

ASTM A312, A358, A778, JIS G3459

OD: 1/4"~40"

TP304, TP304L, TP316L, SUS304TP

WT: SCH5S~SCH80S

Tubes for Boiler and Heat-Exchanger, General Service Tubing

ASTM A249, A269, JIS G3463

OD: 15.9~139.8mm

TP304, TP304L, TP316L, SUS304TB

WT: 1.6~5.0mm

Mechanical and Structural Tubes

ASTM A554, JIS G3446

OD: 7.9~152.4mm

MT304, MT304L, MT316L, MT430 Grade 201, 202 as per mill's STD SUS304

WT: 0.5~6.5mm

Square Tubes

ASTM A554

OD: 12.7x12.7~150x150mm

MT304, MT304L, MT316L, MT430 Grade 201, 202 as per mill's STD

WT: 0.7~6.5mm

Rectangular Tubes

ASTM A554

OD: 10x20~100x200mm

MT304, MT304L, MT316L, MT430 Grade 201, 202 as per mill's STD

WT: 0.7~6.5mm

Sanitary Tubing

ASTM A270

OD: 25.4~165.2mm

TP304, TP304L, TP316L, SUS304TBS

JIS G3447

WT: 0.8~3.05mm

Large Gauge Pipes for Ordinary Piping

JIS G3448

OD: 15.88~318.5mm

SUS304TPD

WT: 0.8~3.0mm

Large Diameter Pipes

JIS G3468

OD: 14"~40"

SUS304TPY

WT: SCH5S~SCH40S


Specification:

Outside Diameter

NPS

Outside Diameter (mm)

Nominal Wall Thickness (mm)

ASME B36.19M

ASME B36.10M

SCH 5S

SCH 10S

SCH 40S

SCH 80S

SCH 5

SCH 10

SCH 20

STD

XS

1/4

13.72

1.65

2.24

3.02


1.65

2.24

3.02

3/8

17.15

1.65

2.31

3.2


1.65

2.31

3.2

1/2

21.34

1.65

2.11

2.77

3.73

1.65

2.11

2.77

3.73

3/4

26.67

1.65

2.11

2.87

3.91

1.65

2.11

2.87

3.91

1

33.4

1.65

2.77

3.38

4.55

1.65

2.77

3.38

4.55

1 1/4

42.16

1.65

2.77

3.56

4.85

1.65

2.77

3.56

4.85

1 1/2

48.26

1.65

2.77

3.68

5.08

1.65

2.77

3.68

5.08

2

60.33

1.65

2.77

3.91

5.54

1.65

2.77

3.91

5.54

2 1/2

73.03

2.11

3.05

5.16

7.01

2.11

3.05

5.16

7.01

3

88.9

2.11

3.05

5.49

7.62

2.11

3.05

5.49

7.62

3 1/2

101.6

2.11

3.05

5.74

8.08

2.11

3.05

5.74

8.08

4

114.3

2.11

3.05

6.02

8.56

2.11

3.05

6.02

8.56

5

141.3

2.77

3.4

6.55

9.53

2.77

3.4

6.55

9.53

6

168.28

2.77

3.4

7.11

10.97

2.77

3.4

7.11

10.97

8

219.08

2.77

3.76

8.18

12.7

2.77

3.76

6.35

8.18

12.7

10

273.05

3.4

4.19

9.27

12.7

3.4

4.19

6.35

9.27

12.7

12

323.85

3.96

4.57

9.53

12.7

3.96

4.57

6.35

9.53

12.7

14

355.6

3.96

4.78

9.53

12.7

3.96

6.35

7.92

9.53

12.7

16

406.4

4.19

4.78

9.53

12.7

4.19

6.35

7.92

9.53

12.7

18

457.2

4.19

4.78

9.53

12.7

4.19

6.35

7.92

9.53

12.7

20

508

4.78

5.54

9.53

12.7

4.78

6.35

9.53

9.53

12.7

22

558.8

4.78

5.54



4.78

6.35

9.53

9.53

12.7

24

609.6

5.54

6.35

9.53

12.7

5.54

6.35

9.53

9.53

12.7

26

660.4

7.92

12.7

9.53

12.7

28

711.2

7.92

12.7

9.53

12.7

30

762

6.35

7.92

6.35

7.92

12.7

9.53

12.7

32

812.8

Thinkness: 8.63-30mm




Tolerances:

Welded Stainless Steel Pipe Tolerances

NPS Designator

Permissible Variations in Outside Diameter

Over In.

Under In.

1/8 to 1-1/2, inch

1/64 (0.015)

1/32 (0.031)

Over 1-1/2 to 4, inch

1/32 (0.031)

1/32 (0.031)

Over 4 to 8, inch

1/16 (0.062)

1/32 (0.031)

Over 8 to 18, inch

3/23 (0.093)

1/32 (0.031)

Process

Stainless Steel Welded Tubes has two welding lines for manufacturing welded tubes and pipes. Stainless Steel Welded Tubes/Pipes are manufactured on Continuous Tube Mill using Multitorch TIG (Tungsten Inert Gas) welding process. Prime quality stainless steel strips having trimmed edges are fed to the tubes mill after thorough quality checks. Strip passes through various sets of rollers fitted in mill as per the required size. This strip is gradually converted in to a tabular shape. The Edges are welded using TIG welding process by welding unit fitted on the mills the inside weld bid is instantaneously removed by online bid removing machine. Rolled Tubes/Pipes thus produced are cut to required length. This is further subjected to heat treatment (annealing) after proper cleaning to remove the stresses included while formation as well as welding and to restore the original grain structure.

Heat Treatment is carried out on the continuous roller hearth furnace fitted with temperature controller and recorder. After heat treatment Tubes/Pipes are straightened and subjected to pickling to remove scale on the surfaces. In case the final size cannot be produced from the mill directly, the same is produced by cold drawing operation. To make the tube/pipe suitable for cold drawing, it is coated with oxalate & shop solution which acts as a lubricant and reduces friction while drawing. In the drawing operation, the tube/pipe is drawn over the draw bench using precision tooling i.e. Dies Plugs as per the requirements of finished size. The drawn tube/pipe undergoes heat treatment, pickling and other operations as specified above after surface cleaning.

Finished pipes/tubes are marked with computerized ink Jet Marking Machine. Each pipe/tube is marked as 'Manufacturing Standard'. Grade of Material, Size, Heat No., Stamp of third party inspection agency to Correlate with our Test Certificate. Finished tubes/pipes thus produced undergo various testing and quality checks followed by proper packing and dispatch.

Packing

  • OD 219mm and above  Loose + pipe cap + two nylon slings

    OD 219mm and above Loose + pipe cap + two nylon slings

  • OD below 219mm (Bundled) Hexagonal packing + steel belts bundled + pipe cap + woven bags + two nylon slings

    OD below 219mm (Bundled) Hexagonal packing + steel belts bundled + pipe cap + woven bags + two nylon slings

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