Stainless Steel Seamless Pipe Manufacturers in Pune, Nagpur, Thane, Pimpri-Chinchwad, Nashik, Aurangabad, Solapur, Kolhapur, Ahmednagar, India

Introduction

Pipes are usually produced by two distinct methods which result in either a welded pipe or a seamless pipe. In both methods, raw material is first cast into ingots. It is then made into a pipe by stretching the steel out into a seamless tube or forcing the edges together and sealing them with a weld.

Seamless pipe, as the name suggests, is a pipe without a seam or a weld-joint. Seamless Steel Pipe is made from a solid round steel ‘billet’ which is heated and pushed or pulled over a form until the steel is shaped into a hollow pipe. The hollow pipe is then extruded through a die and mandrel combination to reduce the outside diameter and to expand the inside diameter.

Seamless pipe is a tubular section or hollow cylinder, usually but not necessarily of circular cross-section, used mainly to convey substances which can flow — liquids and gases (fluids), slurries, powders and masses of small solids.

Design

Seamless tubes are typically more light weight, and have thinner walls. They are used for bicycles and transporting liquids. Certain pipe characteristics can be controlled during production. For example, the diameter of the pipe is often modified depending how it will be used. The diameter can range from tiny pipes used to make hypodermic needles, to large pipes used to transport gas throughout a city. The wall thickness of the pipe can also be controlled. Often the type of steel will also have an impact on pipe’s strength and flexibility. Other controllable characteristics include length, coating material, and end finish.

Click Here to Read About Manufacturing Process of Seamless Pipes

Click Here For Steel Seamless & Welded Pipes Price List 17 December 2018

List of Seamless Pipe Manufacturers

Applications of Seamless Pipe

  1. It can be used for structural applications.
  2. It can be found in a wide range of applications such as in oil and gas, refinery, nuclear device, petrochemical, chemical, fertilizer, power, automotive, bearing, mechanical and structural, ship building and boiler industries.

ASTM Standards / Materials Used

API SPEC 5L/5CT
Product name Executive standard Dimension (mm) Steel code/ Steel grade
Casting API 5CT 114-219 x 5.2-22.2 J55, K55, N80, L80, P110
Tubing API 5CT 48.3-114.3 x 3.2-16 J55, K55, N80, L80, H40
Casting API 5L 10.3-1200 x 1.0-120 A, B, X42, X46, X52, PSL1 / PSL2
ASTM/ASME
Product name Executive standard Dimension (mm) Steel code/ Steel grade
Black and Hot-dipped Zinc-coated Steel Pipes Seamless ASTM A53 0.3-1200 x 1.0-150 GR.A, GR.B, GR.C
Seamless Carbon Steel for High Temperature Service ASTM A106 10.3-1200 x 1.0-150 GR.B, GR.C
Seamless Cold-drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes ASTM A179 10.3-426 x 1.0-36 Low Carbon Steel
Seamless Carbon Steel Boiler Tubes for High Pressure ASTM A192 10.3-426 x 1.0-36 Low Carbon Steel
Seamless Cold-drawn Intermediate Alloy Steel Heat-Exchanger and Condenser Tubes ASTM A199 10.3-426 x 1.0-36 T5, T22
Seamless Medium-carbon Steel Boiler and Superheater Tubes ASTM A210 10.3-426 x 1.0-36 A1, C
Seamless Ferritic and Austenitic Alloy Steel Boiler, Superheater and Heat-exchanger Tubes ASTM A213 10.3-426 x 1.0-36 T5, T5b, T9 , T11, T22 ,T91
Seamless Carbon and Alloy Steel for Mechanical Tubing ASTM A333 1/4″-42″ x SCH20-XXS Grade 1, Gr.3,Gr.6, Gr.8 , Gr.9
Seamless Cold-drawn Carbon Steel Feedwater Heater Tubes ASTM A556 10.3-426 x 1.0-36 A2, B2
For seamless ferritic alloy-steel pipe for high-temperature service ASTM A335 1/4″-42″ x SCH20-XXS P5, P9 ,P11, P91, P22, P92
DIN/EN
Product name Executive standard Dimension (mm) Steel code/ Steel grade
Seamless Steel Tubes for Elevated Temperature DIN 17175 10-762 x 1.0-120 St35.8,St45.8, 10CrMo910, 15Mo3, 13CrMo44, STPL340, STB410, STB510, WB36
Seamless Circular Tubes of Non Alloys Steels with Special Quality Requirements. DIN 1629 13.5-762 x 1.8-120 St37.0, St44.0, St52.0
Seamless steel tubes for pressure purposes EN 10216 4.0-60.0 x 0.5-8 P235GH TC1, P235GH TC2, 16Mo3
5-7 m manufacturing length
Hydraulic and pneumatic power system, low-voltage circuit, power steering, fuel circuit, vibration reduction, and such. EN 10305 13.5-165.1 x 1.8-4.85 St33.2
Specifies the Seamless steel tubes used for Mechanical and Automobile. DIN 2391 4.0-60.0 x 0.5-8 St35, St45, St52
Seamless Steel Tubes DIN 2440 13.5-165.1 x 1.8-4.85 St33.2

Characteristics/Features

  1. Seamless pipe is thought to be able to withstand higher pressure, higher temperatures, higher mechanical stress and a corrosive atmosphere.
  2. Hollow pipe is far stiffer per unit weight than solid members.
  3. High precision can do small batch production.
  4. Smaller diameter.
  5. Weldability strong, high compression capability.
  6. Steel pipe superior performance, relatively dense metal.
  7. Steel Cross area is more complex.
  8. High precision cold drawn products, good surface quality.
  9. The thicker the wall thickness of the solution, it is really more cost effective and wise, the thinner the wall thickness, and its processing costs ill appreciate sharply.
  10. From the process of the product determines its limitations, from the general seamless steel pipe with low accuracy: wall thickness uneven, low brightness tube appearance, fixed length of high cost, and pitting in the appearance of black spots is difficult to bring go;
  11. Seamless steel pipe pressure and hydrostatic test is for pressure tube by into the hydrostatic test, which do not maintain the prescribed pressure value not less than 5 seconds, not to disclose, the regular supply hydraulic pressure test is 2.45MPa pressure The pressure test is P = 0.5MPa.
  12. The corrosion test: industrial corrosion-resistant steel pipe according to standard regulations or agreement between the corrosion of steel pipe corrosion resistance test, no intergranular corrosion.
  13. Seamless Pipes can be cold-drawn or hot rolled. Cold-drawn special-section seamless pipes are widely applied in the industries of petrochemical, boiler, automobile, mechanical, construction.

Advantages of Seamless Pipe

  1. Increased Pressure Ratings. Welded seam of steel pipe is the weakest link. However, since the seamless steel pipe has not been welded, it does not have seams, making it equally strong around the entire circumference of the pipe.
  2. Uniformity of Shape particularly on heavy wall sections and a lack of weld seams and increased structural integrity.
  3. Strength Under Loads
  4. There is greater ability to use multi-hole dies for diameter sizes that are smaller. This will decrease cost and increase productivity. There’s also better control of wall thickness.

Standard Pipe Sizes and Dimensions

A Table of the Most Common Standard Pipe Sizes

Nominal Bore 1/2 inch (DN 15 mm), Outside Diameter 21.34 mm
Schedule Sch. 5 Sch. 10 STD XS Sch.160 XXS
Wall Thickness (mm) 1.65 2.11 2.77 3.73 4.78 7.47
Internal Diameter (mm) 18.04 17.12 15.8 13.9 11.78 6.4
Schedule 40 has same dimensions as STD. Schedule 80 has same dimensions as XS.
Nominal Bore 3/4 inch (DN 20 mm), Outside Diameter 26.67 mm
Schedule Sch. 5 Sch. 10 STD XS Sch.160 XXS
Wall Thickness (mm) 1.65 2.11 2.87 3.91 5.56 7.82
Internal Diameter (mm) 23.37 22.45 20.93 18.85 15.55 11.03
Schedule 40 has same dimensions as STD. Schedule 80 has same dimensions as XS.
Nominal Bore 1 inch (DN 25 mm), Outside Diameter 33.40 mm
Schedule Sch. 5 Sch. 10 STD XS Sch.160 XXS
Wall Thickness (mm) 1.65 2.77 3.38 4.55 6.35 9.09
Internal Diameter (mm) 30.1 27.86 26.64 24.3 20.7 15.22
Schedule 40 has same dimensions as STD. Schedule 80 has same dimensions as XS.
Nominal Bore 1.5 inch (DN 40 mm), Outside Diameter 48.3 mm
Schedule Sch. 5 Sch. 10 STD XS Sch.160 XXS
Wall Thickness (mm) 1.7 2.8 3.7 5.1 7.1 10.2
Internal Diameter (mm) 45 42.7 40.9 38.1 34 27.9
Schedule 40 has same dimensions as STD. Schedule 80 has same dimensions as XS.
Nominal Bore 2 inch (DN 50 mm), Outside Diameter 60.3 mm
Schedule Sch. 5 Sch. 10 STD XS Sch.160 XXS
Wall Thickness (mm) 1.7 2.8 3.9 5.5 8.7 11.1
Internal Diameter (mm) 56.9 54.7 52.5 49.3 42.9 38.1
Schedule 40 has same dimensions as STD. Schedule 80 has same dimensions as XS.
Nominal Bore 3 inch (DN 80 mm), Outside Diameter 88.9 mm
Schedule Sch. 5 Sch. 10 STD XS Sch.160 XXS
Wall Thickness (mm) 2.1 3 5.5 7.6 11.1 15.2
Internal Diameter (mm) 84.7 82.9 77.9 73.7 66.7 58.5
Schedule 40 has same dimensions as STD. Schedule 80 has same dimensions as XS.
Nominal Bore 4 inch (DN 100 mm), Outside Diameter 114.3 mm
Schedule Sch. 5 Sch. 10 STD XS Sch.120 Sch.160 XXS
Wall Thickness (mm) 2.1 3 6 8.6 11.1 13.4 17.1
Internal Diameter (mm) 110.1 108.3 102.3 97.1 92.1 87.5 80.1
Schedule 40 has same dimensions as STD. Schedule 80 has same dimensions as XS.
Nominal Bore 5 inch (DN 125 mm), Outside Diameter 141.3 mm
Schedule Sch. 5 Sch. 10 STD XS Sch.120 Sch.160 XXS
Wall Thickness (mm) 2.8 3.4 6.6 9.5 12.7 15.9 19
Internal Diameter (mm) 135.7 134.5 128.1 122.3 115.9 109.5 103.2
Schedule 40 has same dimensions as STD. Schedule 80 has same dimensions as XS.
Nominal Bore 6 inch (DN 150 mm), Outside Diameter 168.3 mm
Schedule Sch. 5 Sch. 10 STD XS Sch.120 Sch.160 XXS
Wall Thickness (mm) 2.8 3.4 7.1 11 14.3 18.3 22
Internal Diameter (mm) 162.7 161.5 154.1 146.3 139.7 131.7 124.3
Schedule 40 has same dimensions as STD. Schedule 80 has same dimensions as XS.
Nominal Bore 8 inch (DN 200 mm), Outside Diameter 219.1 mm
Schedule Sch. 5 Sch. 10 Sch. 20 Sch. 30 Sch. 40 Sch. 60 Sch. 80 Sch. 100 Sch. 120 Sch. 140 Sch. 160 XXS
Wall Thickness (mm) 2.8 3.8 6.4 7 8.2 10.3 12.7 15.1 18.2 20.6 23 22.2
Internal Diameter (mm) 213.5 211.5 206.3 205.1 202.7 198.5 193.7 188.9 182.7 177.9 173.1 174.7
Nominal Bore 10 inch (DN 250 mm), Outside Diameter 273.0 mm
Schedule Sch. 5 Sch. 10 Sch. 20 Sch. 30 Sch. 40 Sch. 60 Sch. 80 Sch. 100 Sch. 120 Sch. 140 Sch. 160 XXS
Wall Thickness (mm) 3.4 4.2 6.4 7.8 9.3 12.7 15.1 18.2 21.4 25.4 28.6 25.4
Internal Diameter (mm) 266.2 264.6 260.2 257.4 254.4 247.6 242.8 236.6 230.2 222.2 215.8 222.3
Nominal Bore 12 inch (DN 300 mm), Outside Diameter 323.9 mm
Schedule Sch. 5 Sch. 5 Sch. 10 Sch. 20 Sch. 30 Sch. 40 Sch. 40 Sch. 60 Sch. 80 Sch. 100 Sch. 120 Sch. 140 Sch. 160
Wall Thickness (mm) 4 4.2 4.6 6.4 8.4 9.5 10.3 14.3 17.5 21.4 25.4 28.6 33.3
Internal Diameter (mm) 315.9 315.5 314.7 311.1 307.1 304.9 303.3 295.3 228.9 281.1 273.1 266.7 257.3
Nominal Bore 14 inch (DN 350 mm), Outside Diameter 355.6 mm
Schedule Sch. 5 Sch. 10 Sch. 10 Sch. 20 Sch. 30 Sch. 40 XS Sch. 60 Sch. 80 Sch. 100 Sch. 120 Sch. 140 Sch. 160
Wall Thickness (mm) 4 4.8 6.4 7.9 9.5 11.1 12.7 15.1 19.1 23.8 27.8 31.8 35.7
Internal Diameter (mm) 347.7 346 342.9 339.8 336.6 333.3 330.2 325.4 317.5 308 300 292.1 284.2
STD has same dimensions as Schedule 30.
Nominal Bore 16 inch (DN 400 mm), Outside Diameter 406.4 mm
Schedule Sch. 5 Sch. 10 Sch. 10 Sch. 20 Sch. 30 Sch. 40 Sch. 60 Sch. 80 Sch. 100 Sch. 120 Sch. 140 Sch. 160
Wall Thickness (mm) 4.2 4.8 6.4 7.9 9.5 12.7 16.6 21.4 26.2 31 36.5 40.5
Internal Diameter (mm) 398 396.8 393.7 390.6 387.4 381 373.1 363.5 354 344.5 333.4 325.4
STD has same dimensions as Schedule 30. XS has the same dimensions as Schedule 40.

If you are considering seamless steel pipes for your next commercial pipe project, please get in touch with us and request a quote. As a leading domestic and international seamless and welded steel pipes and tubes supplier, we can provide you with the products you need and quickly ship your order to anywhere in the world with 100% refund guarantee.