Stainless Steel 321/321h Instrumentation Tubing

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 Instrumentation Tubing Manufacturer.

SEAMLESS: DIN 1.4541 Instrumentation Tubing | UNS S32100 Instrumentation Tube | JIS SUS 321 Instrumentation Tubing | ASTM A213 TP321h Instrumentation Tubing | A269 TP321 Instrumentation Tubing | BS 321S31 Instrumentation Tubing | EN X6CrNiTi18-10 Instrumentation Tube | DIN 1.4878 Instrumentation Tubing

Stainless Steel 321/321h Instrumentation Tubing Manufacturer

SS S32100 Instrumentation Tubing, ASTM A213 TP321 SS Instrumentation Tubing, Stainless Steel 321h Seamless Instrumentation Tubing, Stainless Steel 1.4541 Instrumentation Tubing, ASME SA213 SS 321 Instrumentation Tubing, 321h SS Instrumentation Tubing Manufacturer in India, SS 321 Instrumentation Tubing Supplier in Qatar, Steel 321h Instrumentation Tubing Exporter in Australia, ASTM A269 TP321 Stainless Steel Instrumentation Tubing, Stainless Steel 321h Welded Instrumentation Tubing.

MPJ Tubing Solutions LLP stands as a premier manufacturer and exporter of Stainless Steel 321/321H Instrumentation Tubing, catering to the exacting requirements of industries worldwide. Their commitment to excellence is evident through their strict adherence to industry standards such as ASTM A213 and ASTM A269, ensuring that their products meet the highest standards of quality and performance.

Their instrumentation tubing portfolio includes Stainless Steel 321/321H, with the material often referred to as SS S32100. This choice of material is specifically engineered to excel in applications demanding remarkable corrosion resistance, making it a preferred choice across various industries.

Known as a trusted exporter in Australia, MPJ Tubing Solutions LLP’s Stainless Steel 321/321H Instrumentation Tubing includes the ASTM A213 TP321 SS variant, known for its superior performance. This tubing is designed to meet the unique needs of critical applications where corrosion resistance is paramount.

The tubing’s versatility is enhanced by its impressive range, with outer diameters spanning from 6.00 mm to 101.40 mm and wall thicknesses ranging from 0.50 mm to 2.00 mm. This wide spectrum of dimensions ensures that MPJ Tubing Solutions LLP can accommodate a diverse set of specifications, meeting the varied requirements of different industries.

MPJ Tubing Solutions LLP’s commitment to delivering precision, quality, and innovation has positioned them as a trusted partner for businesses seeking top-tier instrumentation tubing. They adhere to international standards such as DIN EN (GERMAN), NF (AFNOR), and JIS (JAPAN), ensuring that their products can seamlessly integrate into global operations.

In conclusion, MPJ Tubing Solutions LLP’s Stainless Steel 321/321H Instrumentation Tubing reflects their dedication to providing high-performance tubing solutions. Their products are engineered to not only meet but exceed industry standards, establishing them as a reputable name in the manufacturing and export of instrumentation tubing. With a focus on quality, customization, and international standards compliance, MPJ Tubing Solutions LLP remains a key player in the manufacturing and export of top-quality tubing solutions.

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Stainless Steel 321/321h Instrumentation Tubing Chemical Composition

Grade  Range Ni Cr P Fe C Mn N Si S Ti
321 Min. 9.0 17.0 0 65.045
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 65.25 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 Instrumentation Tubing 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 40%

SS ASTM A213 TP321h Instrumentation Tubing 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 Instrumentation Tubing Standard Specifications

Spec. No.




Seamless Ferritic Stainless Steel and Austenitic Stainless Steel Tubes.

Pressure tubes, made from 16 grades of austenitic stainless steel and from 12 grades of ferritic Cr-Mo Alloy Steel.


Austenitic Stainless Steel Tubing for General Service.

13 grades of austenitic stainless steel tubing for general corrosion-resisting and high-temperature service. (Types 304, 304L, 316, 316L, 317, 321, 347, 348 and XM grades).

Let’s discuss about your ongoing project

Size Range
  • Outer Diameter: 6.00 mm to 101.40 mm.
  • Wall Thickness: 0.50 mm to 2.00 mm
  • Length: Upto 30 Meter
  • Specifications: ASTM, ASME, DIN EN (GERMAN), NF (AFNOR), JIS (JAPAN)
Supply Condition
  • Bright Annealed / Solution Annealed & Passivated
  • Ability to supply tubes with stringent NDT Testing, Special Chemistry, Lower Residual Stress values.
  • OD Polishing : Grit Polish from 120 to 600.
  • Closer Dimensional Tolerance & higher Corrosion Resistance etc.
  • We offer customized cut Length to save time of our customers.
321/321h SS Instrumentation Tubing 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 Instrumentation Tubing supplied.

Brand –

SS 321 Instrumentation Tubing are marked in requirement of the international standards. Format: ” BRAND-SIZE-SPECIFICATION-GRADE-HEAT NUMBER-LOT NUMBER “

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

Stainless Steel 321 Instrumentation Tubing Packing & Documentation

Stainless Steel 321/321h Instrumentation Tubing Packing & Documentation

ASTM A269 TP321h Instrumentation Tubing 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 Instrumentation Tubing is bundled in bubble wrap followed by assorting them in colored plastic bundles. An outer rope is tied to protect the tubing and they are packed in wooden box or container.

MPJ Provide Stainless Steel 321 Instrumentation Tubes and SS 321h Instrumentation Tubing 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 SS 321 Instrumentation Tubing.

We also confirm the guarantee of the 321h SS Instrumentation Tube 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 Instrumentation Tubing 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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SS 321/321h Instrumentation Tubing Suppliers

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