Stainless Steel 310H Welded Pipes Manufacturer in India

What are Stainless Steel 310H Welded Pipe?

Stainless Steel 310H Welded Pipe is an austenitic stainless steel pipe manufactured by forming stainless steel strip or plate into a tubular section and joining the longitudinal seam by welding. The grade contains high chromium and nickel levels, providing strong oxidation and scaling resistance for elevated-temperature environments.

The higher carbon level of 310H is controlled to provide improved high-temperature strength and creep resistance compared with conventional 310 grades. This makes Stainless Steel 310H suitable for selected high-temperature process systems, furnace equipment, heat-treatment equipment and industrial heating applications.

Kamal Steels is a Stainless Steel 310H Welded Pipe Manufacturer and Stockist in India, based in Mumbai. The company supplies 310H welded pipes in different sizes, schedules, wall thicknesses, lengths and surface finishes according to customer and project requirements.

The commonly specified pressure-piping designation is ASTM A312 TP310H / ASME SA312 TP310H, with UNS designation S31009. Pipes can be supplied with applicable testing, inspection and material documentation according to project requirements.

Stainless Steel 310H Welded Pipes

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Stainless Steel 310H Welded Pipe Specifications

Stainless Steel 310H Welded Pipe is a high-carbon austenitic stainless steel pipe developed for elevated-temperature service. Its high chromium and nickel content provides excellent resistance to oxidation and scaling, while the controlled higher carbon content supports higher-temperature strength compared with standard 310 grades.

ASTM A312 TP310H is commonly specified for Stainless Steel 310H Pipe used in high-temperature pressure and process applications. Welded pipes are available in different nominal sizes, schedules, wall thicknesses, lengths, end preparations and surface finishes according to applicable ASTM, ASME and project requirements.

Specification Details
Product Stainless Steel 310H Welded Pipe
Grade 310H / Type 310H
UNS Number S31009
ASTM Specification ASTM A312
ASME Specification ASME SA312
Material Type High-Carbon Austenitic Stainless Steel
Pipe Type Welded
Manufacturing Process Formed Stainless Steel Strip / Plate with Welded Seam
Nominal Size 1/8 NB to 48 NB and as required
Schedules SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160, XXS and others
Length Single Random, Double Random and Cut Length
End Preparation Plain End, Bevelled End, Threaded End and as required
Surface Finish Annealed & Pickled, Mill Finish, Bright Annealed and Polished
Testing Hydrostatic, Ultrasonic, PMI, Dimensional Inspection and other specified tests
Material Certificate EN 10204 3.1 Certificate available as required

Kamal Steels supplies Stainless Steel 310H Welded Pipes in standard and custom sizes, schedules, wall thicknesses and lengths. Testing, inspection, material certification and export packaging can be provided according to applicable standards and customer requirements.

Stainless Steel 310H Welded Pipe Chemical Composition

The chemical composition of Stainless Steel 310H provides its high- temperature mechanical performance and oxidation resistance. Its chromium and nickel content supports resistance to oxidation and scaling, while the controlled carbon content is important for elevated-temperature strength.

Element Composition (%)
Carbon (C) 0.04–0.10
Manganese (Mn) 2.00 max.
Silicon (Si) 1.50 max.
Phosphorus (P) 0.045 max.
Sulfur (S) 0.030 max.
Chromium (Cr) 24.0–26.0
Nickel (Ni) 19.0–22.0
Iron (Fe) Balance

The controlled carbon range distinguishes 310H from the lower-carbon 310S grade and is intended to provide improved high-temperature strength. The actual chemical composition should be verified against the applicable material specification and material test certificate.

Stainless Steel 310H Welded Pipe Sizes, Dimensions & Wall Thickness

Stainless Steel 310H Welded Pipes are supplied in different nominal pipe sizes, outside diameters and wall thicknesses for high-temperature process and industrial applications. The required dimensions are selected according to pipe size, operating pressure, service temperature, design code and project specifications.

Common schedules include SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160 and XXS, subject to pipe size and availability. Heavier schedules provide greater nominal wall thickness and may be selected where additional pressure or mechanical capacity is required.

Nominal Pipe Size Outside Diameter Common Schedules
1/8 NB 10.3 mm SCH 5S, SCH 10S, SCH 40S, SCH 80S
1/4 NB 13.7 mm SCH 5S, SCH 10S, SCH 40S, SCH 80S
1/2 NB 21.3 mm SCH 5S, SCH 10S, SCH 40S, SCH 80S
1 NB 33.4 mm SCH 5S, SCH 10S, SCH 40S, SCH 80S
1 1/2 NB 48.3 mm SCH 5S, SCH 10S, SCH 40S, SCH 80S
2 NB 60.3 mm SCH 5S, SCH 10S, SCH 40S, SCH 80S
3 NB 88.9 mm SCH 5S, SCH 10S, SCH 40S, SCH 80S
4 NB 114.3 mm SCH 5S, SCH 10S, SCH 40S, SCH 80S
6 NB 168.3 mm SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160
8 NB 219.1 mm SCH 10S, SCH 40S, SCH 80S, SCH 160
10 NB 273.1 mm SCH 10S, SCH 40S, SCH 80S, SCH 160
12 NB 323.9 mm SCH 10S, SCH 40S, SCH 80S, SCH 160
14 NB 355.6 mm SCH 10S, SCH 40S, SCH 80S
16 NB 406.4 mm SCH 10S, SCH 40, SCH 80
18 NB 457.2 mm SCH 10S, SCH 40, SCH 80
20 NB 508.0 mm SCH 10S, SCH 40, SCH 80
24 NB 610.0 mm SCH 10S, SCH 40, SCH 80

Kamal Steels supplies Stainless Steel 310H Welded Pipes in standard and custom sizes, schedules, wall thicknesses and lengths according to applicable standards, customer drawings and project specifications.

ASTM A312 TP310H Welded Pipe Dimensions & Tolerances

ASTM A312 TP310H Welded Pipes are manufactured with controlled dimensional requirements for outside diameter, wall thickness, length and applicable pipe dimensions. Dimensional accuracy is important for pipe fabrication, welding, fit-up and installation.

Parameter Requirement
Outside Diameter Controlled according to applicable ASTM A312 dimensional requirements and specified pipe size.
Wall Thickness Controlled according to specified nominal thickness and applicable standard requirements.
Length Available in standard random, double random or specified cut lengths.
Ovality Controlled to maintain acceptable pipe roundness and dimensional consistency.
End Preparation Plain, bevelled or other specified end preparation.

Dimensional inspection can be performed to verify outside diameter, wall thickness, length and other applicable requirements. Additional inspection and testing may be specified for critical applications.

Stainless Steel 310H Welded Pipe Pressure Rating

The pressure rating of Stainless Steel 310H Welded Pipe depends on outside diameter, wall thickness, operating temperature, allowable material stress and the applicable piping design code. Since 310H is intended for elevated-temperature service, pressure design must account for the actual operating temperature.

Factor Effect on Pressure Design
Pipe Size Outside diameter is considered during pressure design calculations.
Wall Thickness A greater wall thickness generally provides higher pressure capacity.
Pipe Schedule Different schedules provide different nominal wall thicknesses.
Operating Temperature Allowable material stress changes with service temperature.
Design Code The applicable piping code determines the pressure design method.
Corrosion Allowance Additional wall thickness may be required for corrosion or erosion.

The maximum allowable working pressure should be established using the actual design pressure, temperature, pipe dimensions, material properties and applicable engineering code. A generic pressure value should not be used as the final design basis.

Stainless Steel 310H Welded Pipe Equivalent Grades

Stainless Steel 310H is identified by different designations under international material standards. These designations help engineers, manufacturers and procurement teams identify the corresponding material during international sourcing.

Standard 310H Designation
ASTM 310H
ASME SA312 TP310H
UNS S31009
EN 1.4845 / grade equivalent subject to specification

Equivalent material designations should be verified against chemical composition, mechanical properties, heat treatment, manufacturing requirements and applicable project standards before material substitution.

Stainless Steel 310H Welded Pipe Surface Finish

The surface finish of Stainless Steel 310H Welded Pipe is selected according to the application, manufacturing process and required surface condition. High-temperature industrial piping generally uses standard mill or annealed and pickled finishes, while specialized applications may require brighter or polished surfaces.

Surface Finish Description Typical Application
Annealed & Pickled Heat-treated and chemically cleaned surface. Industrial process piping
Mill Finish Standard surface obtained during manufacturing. General industrial applications
Bright Annealed Bright and smooth surface produced by controlled annealing. Specialized process applications
Polished Mechanically finished surface with improved smoothness. Specialized applications

The required finish should be specified according to the operating environment, cleaning requirements, fabrication process and final use. Kamal Steels can supply Stainless Steel 310H Welded Pipes with specified surface conditions according to customer and project requirements.

Stainless Steel 310H Welded Pipe Applications

Stainless Steel 310H Welded Pipes are used primarily in high-temperature applications where oxidation resistance, scaling resistance and high-temperature mechanical strength are important.

Application Typical Use
Furnace Equipment High-temperature furnace piping and components
Heat Treatment Heat-treatment systems and high-temperature process lines
Petrochemical Elevated-temperature process systems
Chemical Processing High-temperature process piping and equipment
Power Generation Selected high-temperature piping systems
Industrial Heating Heating and combustion-related equipment
Process Plants High-temperature process and utility piping

The suitability of Stainless Steel 310H should be evaluated according to the actual operating temperature, pressure, atmosphere, corrosion conditions and applicable design requirements.

Industries Using Stainless Steel 310H Welded Pipe

Stainless Steel 310H Welded Pipes are used across industries where high-temperature resistance, oxidation resistance and elevated-temperature mechanical performance are required.

Industry Typical Use
Power Generation High-temperature piping and process systems
Petrochemical Elevated-temperature process piping
Chemical Processing High-temperature chemical process systems
Oil & Gas Selected process and heat-related piping applications
Heat Treatment Furnaces and high-temperature process equipment
Industrial Manufacturing High-temperature equipment and fabricated piping
Engineering & Fabrication Industrial high-temperature piping systems

Kamal Steels supplies Stainless Steel 310H Welded Pipes from India for domestic and international industrial requirements. Pipes can be supplied in different sizes, schedules, wall thicknesses, lengths, finishes, testing conditions and material documentation according to project requirements.

Frequently Asked Questions

Stainless Steel 310H Welded Pipe is a high-carbon austenitic stainless steel pipe designed for elevated temperature service. It offers excellent creep strength, oxidation resistance, and long-term durability.

SS 310H has a higher carbon content than standard SS 310, providing improved high-temperature strength and creep resistance for prolonged service at elevated temperatures.

Our Stainless Steel 310H Welded Pipes are manufactured according to ASTM A312, ASTM A358, ASME SA312, ASTM A778, and ASME B36.19M standards.

We supply SS 310H Welded Pipes from 1/8" NB to 24" NB in multiple schedules, wall thicknesses, and customized lengths.

These pipes are widely used in furnaces, boilers, heat exchangers, refineries, petrochemical plants, power plants, cement plants, and chemical processing industries.

Yes. SS 310H is specifically designed for continuous high-temperature applications where superior creep resistance and oxidation resistance are required.

Every pipe undergoes Hydrostatic Testing, PMI, Radiographic Testing, Dimensional Inspection, Visual Inspection, and other quality tests before delivery.

Yes. All Stainless Steel 310H Welded Pipes are supplied with EN 10204 3.1 Mill Test Certificates, and third-party inspection is available upon request.

Yes. We offer customized diameters, wall thicknesses, schedules, lengths, end preparations, and surface finishes according to project requirements.

Kamal Steels offers premium-quality SS 310H Welded Pipes with certified materials, competitive prices, ready stock, strict quality control, prompt delivery, and reliable export services worldwide.