Stainless Steel 321/321h Seamless Pipe

With in-house quality testing and certification, you can count on quality materials delivered with proper documentation.

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Stainless Steel 321/321h Seamless Pipe Manufacturer.

SEAMLESS: DIN 1.4541 Pipe | UNS S32100 Pipe | JIS SUS 321 Pipe | ASTM A312 TP321h Pipe | ASTM A376 TP321 Pipe | BS 321S31 Pipe | EN X6CrNiTi18-10 Pipe | DIN 1.4878 Pipe

Stainless Steel 321/321h Seamless Pipe Manufacturer

SS S32100 Seamless Pipe, ASTM A312 TP321 SS Seamless Pipes, Stainless Steel 321h Seamless Pipes, Stainless Steel 1.4541 Seamless Pipe, ASME SA312 SS 321 Seamless Pipe, 321h SS Seamless Pipe Manufacturer in India, SS 321 Smls Pipes Supplier in Qatar, Steel 321h Seamless Pipes Exporter in Australia, ASTM A312 TP321 Stainless Steel Smls Pipes, Stainless Steel 321h Seamless Pipe.

MPJ Tubing Solutions LLP stands at the forefront of the industry as a leading manufacturer and exporter of Stainless Steel 321/321H Seamless Pipes. These high-quality pipes adhere to stringent industry standards, including ASTM A312 and ASTM A376, making them the preferred choice for various applications. Whether you require ASTM A312 TP321 SS Seamless Pipes or Stainless Steel 321/321H Smls Pipes, MPJ Tubing Solutions LLP is your trusted partner.

The Stainless Steel 321/321H Seamless Pipe is known for its outstanding corrosion resistance and high-temperature performance, making it an ideal choice for applications demanding durability in extreme conditions. As a reputable 321H SS Seamless Pipe Manufacturer in India, MPJ Tubing Solutions LLP has earned a stellar reputation for delivering top-notch stainless steel pipes. These pipes are designed to meet the specific requirements of industries such as petrochemicals, power generation, and more.

MPJ Tubing Solutions LLP offers a comprehensive range of options for Stainless Steel 321/321H Seamless Pipes, ensuring that customers can find the perfect fit for their projects. These pipes come in various outer diameters, ranging from 1/8″” NPS to 12″” NPS, catering to diverse industrial requirements. Additionally, customers can choose from a variety of wall thicknesses, including Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 100, Sch 120, Sch 140, Sch 160, and Sch XXS, with thicknesses ranging from 1.24mm to 25.40mm.

With lengths of up to 12 meters, MPJ Tubing Solutions LLP ensures that customers have the flexibility to select the right SS 321/321H Seamless Pipe for their specific projects. These pipes conform to international standards, including ASTM, ASME, DIN EN (German), NF (AFNOR), and JIS (Japan Industrial Standard), guaranteeing their suitability for global applications.

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Stainless Steel 321/321h Seamless Pipe Chemical Composition

Grade  Range Ni Cr P C Mn N Si S Ti
321 Min. 9.0 17.0 0
Max. 12.0 19.0 0.045 0.08 2.0 0.10 1.0 0.030 5(C+N) -0.70
321H Min. 9.0 17.0 0.04
Max. 12.0 19.0 0.045 0.010 2.00 0.10 1.00 0.030 4(C+N) -0.70

SS 321/321h Seamless Pipes Mechanical Properties

Grade Tensile Strength min (MPa) Yield Strength 0.2% Proof min (MPa) Hardness Elongation (% in 50mm) min
Brinell max (HB) Rockwell B max (HR B)
321/321h 515 205 217 95 35%

SS ASTM A312 TP321h Pipe Equivalent Grades

Grade UNS No Old British Euronorm Japanese JIS Swedish SS GOST
BS En No Name
321 S32100 321S31 X6CrNiTi18-10 1.4541 SUS 321 2337
321h S32109 321S51 X10CrNiTi18-10 1.4878 SUS 321h

321/321h Stainless Steel Pipes Standard Specifications

Spec. No.




Seamless Austenitic Stainless Steel Pipe.

Austenitic Stainless Steel Seamless Pipe intended for use in the diary and food industry in sizes up to and including 4 in. in outside diameter.


seamless austenitic steel pipe intended for high-temperature central-station service.

ASTM A376 grades covered are five H grades and two nitrogen grades. ASTM A376 Pipe may be either hot finished or cold finished, with a suitable finishing treatment.

Let’s discuss about your ongoing project

Size Range
  • Outer Diameter: 1/8″ NPS to 12″ NPS
  • Wall Thickness: Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 100, Sch 120, Sch 140, Sch 160, Sch XXS ( 1.24mm to 25.40mm )
  • Length: Up to 12mtr long
  • Specifications: ASTM, ASME, DIN EN (GERMAN), NF (AFNOR), JIS (JAPAN)
  • Ability to supply tubes with stringent NDT Testing, Special Chemistry, Lower Residual Stress values.
  • Closer Dimensional Tolerance & higher Corrosion Resistance etc.
  • We offer customized cut Length to save time of our customers.
Supply Condition
  • Solution Annealed & Passivated
321/321h SS Seamless Pipe Quality Control

To ensure a quality product, MPJ is holding certificate ISO 9001:2015, ISO 45001, OHSAS 14001, & CE-PED. We are also members of various renowned agencies and Chambers of Commerce including MASSMA, EEPC, FICCI, FIEO, Indian Merchants Chamber, etc. With state-of-the-art manufacturing processes, contemporary technologies, and proficient services, we consider: offering the finest quality, best in class products. Compliance with specifications as per standards, Outer Diameter, Thickness, Inside Diameter, Inside Finish, Marking, Ends, and Finishing. This ensures that we never face a rejection of the Stainless Steel 321h Seamless Pipe supplied.

Brand –

SS 321 Seamless Pipe are marked in requirement of the international standards.

This marking helps for the identification of the pipe and supported with the Material Test Report. It is 100% traceable to our mill.

Stainless Steel 321 SMLS Pipes Packing & Documentation

Stainless Steel 321/321h SMLS Pipes Packing & Documentation

ASTM A312 TP321h Seamless Pipes are surface wash and clean to remove all impurities and stock in the warehouse. Then it is wrapped in thin plastic and also it ends are protected by plastic caps to avoid any damage in transit. Stainless Steel 321 Seamless Pipe is bundled in bubble wrap followed by assorting them in colored plastic bundles. An outer rope is tied to protect the piping and they are packed in wooden box or container.

MPJ Provide Stainless Steel 321 Seamless Pipe and SS 321hL Seamless Pipes with all necessary documents such as commercial invoice, packing list, Test Reports, HS Code, Country of Origin attested by the chamber of commerce, Fumigation Certificate, Warranty Letter, and Base Material Certificates. Every lot is supplied with a material test certificate as per EN 10204 NACE 3.1 standards indicating the chemical and mechanical properties of the 321h Seamless Pipes.

We also confirm the guarantee of the seamless Pipes supplied as per Purchase order specifications and attest the same in the Material Test Certificate. We also welcome any third party inspection from an agency nominated by the customer to comply with NACE 3.2 Certification if required by the customer at an extra cost.

SS 321/321h Seamless Pipe Application Industries

  • Oil & Gas Exploration
  • Petrochemicals and Refineries
  • Cross Country Pipe Line for Gas & Water
  • Pipes for Engineering purpose
  • Thermal, Nuclear and Solar Power Plants
  • Desalination Plants
  • Chemical Industries
  • Aerospace
  • Atomic Energy
  • Pharmaceutical
  • Food and Dairy
  • Automobile
Chemical Industries
Chemical Industries
Cross Country Pipe Line for Gas and Water
Cross Country Pipe Line
Oil and Gas Exploration
Oil and Gas Exploration
Petrochemicals and Refineries
Petrochemicals and Refineries
Thermal, Nuclear and Solar Power Plants
Thermal, Nuclear and Solar Power Plants

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