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Stainless Steel Pipes & Tubes

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Stainless steel tubes and pipes are important elements in most industrial setups. Stainless steel pipes and tubes are made of a high-quality alloy of iron, chromium, and, in some instances, nickel and other metals that make them very resistant to corrosion, heat & chemical damage. Their versatility, durability and strength make them perfect in piping and tubing solutions that will have a long life span in their operations in harsh environments. 

Our product offerings are a variety of stainless steel tubing products that include seamless, welded, round, square and hollow section tubes. Our stainless steel pipes and tubes are essential in oil and gas applications and even in aerospace due to the inherent nature of stainless steel, which includes resistance to corrosion, high strength and ability to withstand temperatures. The use of stainless steel pipes and tubes will provide a minimum of maintenance, long life service, and safe transportation of materials & therefore is particularly appropriate in the pharmaceutical, food processing and chemical industries. The products of stainless steel tubing incorporate reliability, efficiency and durability to satisfy the highest industrial standards.

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Stainless Steel (SS) Pipe & Tubing  Supplier

Kalpataru Piping is one of the manufacturers and suppliers of high quality stainless steel pipes and tubes in India. Our products are seamless and welded, round and square tubes, and special alloy pipes, which are offered in grades such as 304, 316, 904L and Duplex Steel. We are also offering customized stainless steel tubing products that meet the specifications of the clients and are precise, durable, and reliable in performance.

Advanced Manufacturing & Quality Assurance

At Kalpataru Piping, the production of stainless steel pipes and tubes is done on the latest production lines and the latest precision testing facilities. All its products comply with international standards (ASTM/ASME, DIN/ISO, etc.) in order to be strong, corrosion-resistant, and smooth. We have the capabilities to weld stainless steel, seamless, and custom shape pipes in a large range of diameters, grades, schedules and wall thickness.

We can fully customize it, including changing dimensions, special metallurgical considerations, and thus it is possible that clients were able to find stainless steel pipes and tubes exactly as they fit their operations. There is a strict quality inspection of each product, which includes X-Ray, hydro, and mechanical tests, which guarantee any reliability during global usage, and uniformity in performance throughout tough industrial products.

Stainless Steel Pipe & Tubing Products Manufacturing Grades

Kalpataru Piping is a manufacturer of high quality stainless steel pipe and tubing products in a vast array of austenitic grades of stainless steel, such as 304/304L and 316/316L, 304H, 304LN, 316Ti, 310S, 904L, 317L, 321/321H, and 347/347H.

STANDARD WERKSTOFF NR. UNS
SS 304 1.4301 S30400
SS 304L 1.4306 / 1.4307 S30403
SS 304H 1.4301 S30409
SS 310S 1.4845 S31008
SS 316 1.4401 / 1.4436 S31600
SS 316L 1.4404 / 1.4435 S31603
SS 316Ti 1.4571 S31635
SS 321 1.4541 S32100
SS 347 1.4550 S34700

Types of Stainless Steel (SS) Pipes & Tubes

Kalpataru Piping offers a wide variety of stainless steel pipes and tubing to meet the diverse needs of modern industries. Our range includes:

SS Seamless Pipes and Tubes

Stainless steel seamless pipes and tubes provide high dimensional accuracy, are uniform in strength, and are very good at resisting corrosion. They come in nominal bore sizes as small as 1/8 inch to as large as 30 inches with a plethora of outer diameters and wall thicknesses, making them suitable to high demand applications. They are made to ASTM A312 / A312M and other international standards which guarantee reliability and good service life.

SS Welded Pipes and Tubes

Stainless steel welded pipes and tubes can be produced by bending the stainless steel plates or stainless steel coils into tubular form by using the round cross-section and then joining them by welding. These pipes and tubes can be produced by standards such as A249, A269, A312, and EN 10217-7. The pipes can range from outer diameters of 21.3mm to 219.1mm. The pipes can be produced in grades such as 304/316L.

Stainless Steel EFW Pipes & Tubes

ERW stainless steel pipes are prepared through the longitudinal welding with the stainless steel coils or strips of the material using electric resistance welding to give a uniform strength and a clean finish. The pipe schedule will be used to determine the thickness of each outer diameter. Our ERW stainless steel pipes are produced according to the ASTM A312 requirements, which guarantees stability and dimension and consistent performance.

Stainless Steel ERW Pipes & Tubes

The stainless steel EFW (Electric Fusion Welded) pipes are manufactured by rolling the stainless steel plates and then welding the seam through high-voltage electric fusion welding, without any filler materials. The pipes produced using this process provide great strength and uniformity with a large diameter of 6 inches up to 100 inches. Produced in forms of SS 304/304L and SS 316, and according to ASTM A312. 

Specification of Stainless Steel (SS) Pipes / Tubes

Category Details
Dimensions ASTM, ASME, and API
Standard ASTM / ASME SA213 / A249 / A269 / A312 / A358 CL. I to V, ASTM A789 / A790
Size 1/8″ NB to 30″ NB IN
Pipe & Tube 1/2″ NB – 16″ NB
EFW Pipe & Tube 6″ NB – 100″ NB
ERW Pipe & Tube 1/2″ NB – 24″ NB
Specialized in Large Diameter Size
Schedule SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH120, SCH140, SCH160, XXS
Form Round, Square, Rectangular, Hydraulic, etc.
Type Seamless / ERW / Welded / Fabricated / LSAW Pipes
Length Single Random, Double Random & Cut Length
End Plain End, Beveled End, Threaded

SS Pipes & Tubes Standrads Specifications – ASTM A312, A269 & A358

International Standards
  • ASTM / ASME: 213, 249, 268, 269, 270, 312, 688, 376, 789, 790
Duplex & Super Duplex Grades
  • UNS 31803, UNS 32205, UNS 32750, UNS 32760
DIN & EN Grades
  • DIN: 1.4005, 1.4301, 1.4401, 1.4541, 1.4462
  • EN: 10216-5 and equivalent standards

Manufacturing Process of Stainless Steel Pipes & Tubes

  1. Welded Stainless Steel Pipes & Tubes

Welded tubes are made by rolling stainless steel strips into a tube and longitudinally welding the seam.

  • Hot Forming: Tubes are heated before rolling, ideal for larger diameters.
  • Cold Forming: Rolled at room temperature for smooth surfaces and precise dimensions.

Final tubes are tested for strength, corrosion resistance, and dimensional accuracy.

Product S.S Welded Tubes
Outer Diameter ¼” to 4½” O.D. (12.70mm to 114.30 mm)
Thickness 0.30 mm to 5 mm

SS Manufacturing Specification

As Per (American Society for Testing and Materials)

ASTM A249

ASTM A554
Testing

Tensile Test

Flattening Test

Flare Flange Test

Reverse Bend Test

Reverse Bend Test

100% Hydrostatic Test

Hardness Test
  1. Seamless Stainless Steel Pipes & Tubes

Seamless tubes are made from solid billets pierced and rolled into hollow tubes.

  • Extrusion & Rolling: Achieves the required diameter and wall thickness.
  • Heat Treatment & Finishing: Tubes are annealed, straightened, and surface-finished.

Seamless tubes are ideal for high-pressure, high-temperature, and corrosive applications, while welded tubes are versatile and cost-effective for general industrial use.

Product S.S. Seamless Tubes
SS Seamless Tube Outer Diameter 6 mm to 101.6 mm
Thickness 0.80 mm to 4 mm

SS Manufacturing Specification

As Per (American Society for Testing and Materials)

ASTM A213

ASTM A269

ASTM A270
Testing

Tensile Test

Flattening Test

Flare Flange Test

Reverse Bend Test

100% Hydrostatic Test

Hardness Test

Chemical Composition of SS Pipes

Grade C(max) Si(max) Mn(max) P(max) S(max) Cr Ni Mo Ti
TP304/1.4301 0.08 1 2 0.045 0.03 18.0-20.0 8.0-10.5    
TP304L/1.4307 0.035 1 2 0.045 0.03 18.0-20.0 8.0-12.0    
TP304H/1.4948 0.04-0.10 1 2 0.045 0.03 18.0-20.0 8.0-12.0    
TP316/1.4401 0.08 1 2 0.045 0.03 16.0-18.0 11.0-14.0 2.0-3.0  
TP316L/1.4404 0.035 1 2 0.045 0.03 16.0-18.0 10.0-14.0 2.0-3.0  
TP316Ti/1.4571 0.08 1 2 0.045 0.03 16.0-18.0 10.0-14.0 2.0-3.0 0.7>5x(C+N)
TP321/1.4541 0.08 1 2 0.045 0.03 17.0-19.0 9.0-12.0   0.7>5x(C+N)
TP317L/1.4449 0.08 1 2 0.045 0.03 18.0-20.0 11.0-14.0 3.0-4.0  
TP347H/1.4912 0.04-0.10 1 2 0.045 0.03 17.0-19.0 9.0-13.0    
TP309S/1.4833 0.08 1 2 0.045 0.03 22.0-24.0 12.0-15.0 0.75  
TP310S/1.4845 0.08 1 2 0.045 0.03 24.0-26.0 19.0-22.0 0.75  

Mechanical Properties of Stainless Steel Tubes

Material Heat Temperure Tensile Strength Yield Strength Elongation %, Min
Treatment Min. Ksi (MPa), Min. Ksi (MPa), Min.
  º F(º C)    
TP304 Solution 1900 (1040) 75(515) 30(205) 35
TP304H Solution 1900 (1040) 75(515) 30(205) 35
TP304L Solution 1900 (1040) 70(485) 25(170) 35
TP310S Solution 1900 (1040) 75(515) 30(205) 35
TP316 Solution 1900(1040) 75(515) 30(205) 35
TP316L Solution 1900(1040) 70(485) 25(170) 35
TP316H Solution 1900(1040) 75(515) 30(205) 35
TP316Ti Solution 1900(1040) 75(515) 30(205) 35
TP321 Solution 1900(1040) 75(515) 30(205) 35
TP321H Solution Cold: 2000(1100) 75(515) 30(205) 35
Hot: 1925(1050)
TP347 Solution 1900(1040) 75(515) 30(205) 35
TP347H Solution Cold: 2000(1100) 75(515) 30(205)  
Hot: 1925(1050)  

Stainless Steel Pipes & Tubes Dimensions & Weight

For detailed specifications, sizes, and weight of all stainless steel pipes and tubes, explore our Stainless Steel Pipes & Tubes Weight Chart. You can also check the Stainless Steel Pipe Dimension Chart for accurate diameters, wall thicknesses, and standard dimensions as per ASTM and ANSI standards.

Nominal Bore Outside Diameter Sch-5S Sch-10S Sch-40S Sch-80S Sch-160S Sch-XXS
mm INCH mm Wt Weight Wt Weight Wt Weight Wt Weight Wt Weight Wt Weight
      mm (Kg/mt) mm (Kg/mt) mm (Kg/mt) mm (Kg/mt) mm (Kg/mt) mm (Kg/mt)
3 1/8 10.3 1.24 0.276 1.24 0.28 1.73 0.37 2.41 0.47 – – – –
6 1/4 13.7 1.24 0.390 1.65 0.49 2.24 0.631 3.02 0.80 – – – –
10 3/8 17.1 1.24 0.490 1.65 0.63 2.31 0.845 3.20 1.10 – – – –
15 1/2 21.3 1.65 0.800 2.11 1.00 2.77 1.27 3.75 1.62 4.75 1.94 7.47 2.55
20 3/4 26.7 1.65 1.03 2.11 1.28 2.87 1.68 3.91 2.20 5.54 2.89 7.82 3.63
25 1 33.4 1.65 1.30 2.77 2.09 3.38 2.50 4.55 3.24 6.35 4.24 9.09 5.45
32 1 1/4 42.2 1.65 1.65 2.77 2.70 3.56 3.38 4.85 4.47 6.35 5.61 9.70 7.77
40 1 1/2 48.3 1.65 1.91 2.77 3.11 3.68 4.05 5.08 5.41 7.14 7.25 10.16 9.54
50 2 60.3 1.65 2.40 2.77 3.93 3.91 5.44 5.54 7.48 8.74 11.1 11.07 13.44
65 2 1/2 73.0 2.11 3.69 3.05 5.26 5.16 8.63 7.01 11.4 9.53 14.9 14.2 20.39
80 3 88.9 2.11 4.51 3.05 6.45 5.49 11.30 7.62 15.2 11.1 21.3 15.24 27.65
100 4 114.3 2.11 5.84 3.05 8.36 6.02 16.07 8.56 22.3 13.49 33.54 17.12 41.03
125 5 141.3 2.77 9.47 3.40 11.57 6.55 21.8 9.53 31.97 15.88 49.11 19.05 57.43
150 6 168.3 2.77 11.32 3.40 13.84 7.11 28.3 10.97 42.7 18.2 67.56 21.95 79.22
200 8 219.1 2.77 14.79 3.76 19.96 8.18 42.6 12.7 64.6 23.0 111.2 22.23 107.8
250 10 273.1 3.40 22.63 4.19 27.78 9.27 60.5 12.7 96.0 28.6 172.4 25.40 155.15
300 12 323.9 3.96 31.25 4.57 36.00 9.52 73.88 12.7 132.0 33.32 238.76 25.40 186.97
350 14 355.6 3.96 34.36 4.78 41.3 11.13 94.59 19.05 158.08 35.71 281.70 – –
400 16 406.4 4.19 41.56 4.78 47.29 12.7 123.30 21.41 203.33 40.46 365.11 – –
450 18 457.2 4.19 46.80 4.78 53.42 14.27 155.80 23.8 254.36 45.71 466.40 – –
500 20 508.0 4.78 59.25 5.54 68.71 15.09 183.42 26.19 311.2 49.99 564.68 – –
600 24 609.6 5.54 82.47 6.35 94.45 17.48 255.41 30.96 442.08 59.54 808.22 – –

Stainless Steel Round Tubes Size Chart

Size Thickness Availability in mm    
  0.40 0.65 1.00 1.20 1.50 2.00 3.00
6.35 0.06 0.09 0.13        
9.53 0.09 0.14 0.21 0.25      
12.70 0.12 0.20 0.29 0.35 0.42    
15.88 0.15 0.25 0.37 0.44 0.54    
19.05 0.18 0.30 0.45 0.54 0.66    
22.23   0.35 0.53 0.63 0.78 1.01  
25.40   0.40 0.61 0.73 0.90 1.17  
28.00   0.44 0.68 0.80 0.99 1.30 1.88
31.75   0.51 0.77 0.92 1.13 1.49 2.16
34.93     0.85 0.01 1.25 1.65 2.39
38.10     0.93 0.11 1.37 1.81 2.63
44.45     1.09 1.30 1.61 2.12 3.11
50.80     1.25 1.49 1.85 2.44 3.59
63.50       1.55 2.33 3.08 4.54

Outside Diameter Tolerance for Stainless Steel Pipes

NPS ASTM A312 OD Tolerance
+ –
inch mm inch mm
1/8~1 1 /2 1/64(0.015) 0.4 1/32(0.031) 0.8
> 1 1 /2~4 1/32(0.031) 0.8 1/32(0.031) 0.8
> 4~8 1/16(0.062) 1.6 1/32(0.031) 0.8
> 8~18 3/32(0.093) 2.4 1/32(0.031) 0.8
> 18~26 1/8(0.125) 3.2 1/32(0.031) 0.8
> 26~34 5/32(0.156) 4 1/32(0.031) 0.8
> 34~48 3/16(0.187) 4.8 1/32(0.031) 0.8

Packing Excellence

At Kalpataru Piping, we ensure that quality is maintained from our factory to the customer’s site. Special attention is given to long, thin-walled tubes and complex geometries, such as U-bend tubes, to prevent deformation during transit.

Our packaging process includes:

  • Customized Bundling: Ensures stability and easy handling.
  • Protective End Caps: These prevent mechanical damage of pipe ends.
  • Corrosion Prevention Treatments: It prevents rust when shipping over a long distance.
  • Safe Tying Procedures: Cures movement and conflict injuries.

All packaging operations are in line with the domestic and international shipping requirements, which ensure safe delivery without any damage throughout the world.

Quality Assurance – Uncompromising at Every Step

At Kalpataru Piping quality assurance is ongoing and not a one-time check. The Independent Quality Control Department belongs to the production as a separate structure of our company in order to guarantee unbiased control at all levels, starting with the raw materials entrance and the final product testing.

We conduct:

  • Destructive Testing: Tensile, hardness and impact tests to ensure the strength and ductility.
  • Non-Destructive Testing: ultrasonic, eddy current and hydrostatic testing to find defects.

The most used pipes and tubes are made of stainless steel, and they are made in a specific way to comply with international standards and are accepted by the major TPIs, EPCs, and contractors. They will be used to meet the requirements of the project. Kalpataru Piping, which produces piping systems of the most modern technology, follows high-quality procedures and offers supply worldwide, is a sure supplier of seamless stainless steel pipes, welded stainless steel pipes, and customized pipes throughout the world.

Stainless Steel Pipes & Tubes FAQs

What types of stainless steel pipes does Kalpataru Piping manufacture?

We manufacture different products that include seamless and welded stainless steel pipes, round, square, and custom-shaped tubes in different grades such as 304, 316, 904L, and Duplex Steel.

How do seamless stainless steel pipes differ from welded pipes?

Seamless pipes are made from solid billet, which is better in strength and more resistant to high pressure. Welded pipes are created through rolling strips of stainless steel and welding the width, which are suitable for general applications and a cost-effective remedy.

Which stainless steel grades are available?

We have a wide range of grades, which are 304, 304L, 304H, 316, 316L, 316Ti, 310S, 904L, 317L, 321/321H, 347/347H, and Duplex Steel, which make it suitable to various industrial settings.

Can I order custom lengths, sizes, or wall thicknesses?

Yes, we do offer customized stainless steel pipes and tubes according to the requirements of the projects, such as their dimensions, thickness of their walls and other metallurgical conditions.

Which industries use your stainless steel pipes and tubes?

Our products are commonly used in the chemical, petrochemical, steel, oil and gas, pharmaceutical, food processing, shipping, and power generation industries.

Do your stainless steel pipes meet international standards?

Yes, we have all our pipes and tubes meeting the ASTM, ASME, DIN, and ISO standards in order to maintain the same quality and performance globally.

Is international shipping available?

Yes, we provide international delivery in order to deliver safely to ensure our clients in various countries.

Do you provide inspection and testing reports with shipments?

Yes,. All of our material is accompanied by material test certificates, X-Ray, hydrostatic, and mechanical testing reports according to the requirements given by the project.

Can Kalpataru Piping handle urgent or emergency orders?

Yes, we do take urgent and priority orders, which is why we deliver on time without jeopardizing quality or specifications

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