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Stainless Steel 316H Seamless Pipes are manufactured from austenitic stainless steel grade 316H, a high-carbon variant designed for applications where elevated-temperature strength and corrosion resistance are important. The addition of molybdenum provides improved resistance to chloride-containing and corrosive environments, while the higher carbon content helps support strength at elevated operating temperatures. The seamless construction makes these pipes suitable for demanding process and industrial piping systems where the applicable specification permits their use.
Kamal Steels supplies Stainless Steel 316H Seamless Pipes in different outside diameters, wall thicknesses, schedules, lengths and end configurations according to applicable standards and customer requirements. SS 316H seamless pipe is commonly specified for chemical processing, petrochemical, power generation, heat-transfer equipment, high-temperature process systems and other industrial applications requiring reliable performance. ASTM A312 TP316H and ASME SA312 options can be supplied with applicable testing, inspection and material documentation.
| Specification | Details |
|---|---|
| Product Name | Stainless Steel 316H Seamless Pipe |
| Grade | SS 316H / Type 316H |
| UNS | S31609 |
| EN Grade | 1.4919 |
| Material Type | Austenitic Stainless Steel |
| Manufacturing Process | Seamless |
| Product Standard | ASTM A312 |
| ASME Specification | ASME SA312 |
| Size Range | 1/8" to 24" and above as required |
| Schedule | 5S, 10S, 40S, 80S, 160 and other schedules |
| Wall Thickness | As per applicable schedule or specified requirement |
| Length | Random, Double Random or Fixed Length |
| End Type | Plain End, Bevelled End or Threaded End as required |
| Surface Finish | Pickled & Passivated, Annealed, Bright Annealed or Polished |
| Heat Treatment | Solution Annealed and Rapidly Cooled as specified by the applicable standard |
| Testing | Hydrostatic, PMI, Ultrasonic, Flattening, Flaring and other applicable tests |
| Inspection | Third Party Inspection available as required |
| Certification | EN 10204 3.1 / Material Test Certificate (MTC) |
| Packaging | Bundles, Wooden Cases, Wooden Boxes, Plastic End Caps and Export Packing |
Stainless Steel 316H Seamless Pipes are available in a broad range of nominal pipe sizes, outside diameters and wall thicknesses for different industrial piping requirements. The required size is selected according to flow requirements, operating pressure, temperature, design conditions and applicable piping standards.
| Nominal Pipe Size | Outside Diameter | Common Schedules |
|---|---|---|
| 1/2 Inch | 21.3 mm | SCH 5S, 10S, 40S, 80S |
| 1 Inch | 33.4 mm | SCH 5S, 10S, 40S, 80S |
| 2 Inch | 60.3 mm | SCH 5S, 10S, 40S, 40, 80S |
| 3 Inch | 88.9 mm | SCH 5S, 10S, 40S, 80S |
| 4 Inch | 114.3 mm | SCH 5S, 10S, 40S, 40, 80S |
| 6 Inch | 168.3 mm | SCH 5S, 10S, 40S, 80S |
| 8 Inch | 219.1 mm | SCH 10S, 40S, 80S, 160 |
| 10 Inch | 273.0 mm | SCH 10S, 40S, 80S, 160 |
| 12 Inch | 323.9 mm | SCH 10S, 40S, 80S, 80, 160 |
Other sizes and wall thicknesses can be supplied according to the applicable specification, drawing or customer requirement.
The weight of Stainless Steel 316H Seamless Pipe depends mainly on its outside diameter, wall thickness, nominal size, schedule and length. Accurate pipe weight information is useful for material estimation, transportation planning and project costing.
| Pipe Size | Schedule | Wall Thickness | Approx. Weight |
|---|---|---|---|
| 1/2 Inch | SCH 40S | 2.77 mm | As per applicable dimensional standard |
| 1 Inch | SCH 40S | 3.38 mm | As per applicable dimensional standard |
| 2 Inch | SCH 40S | 3.91 mm | As per applicable dimensional standard |
| 4 Inch | SCH 40S | 6.02 mm | As per applicable dimensional standard |
| 6 Inch | SCH 40S | 7.11 mm | As per applicable dimensional standard |
Actual weight may vary according to the specified dimensions, tolerances, length and applicable manufacturing standard. Weight should therefore be confirmed from the dimensional specification before final procurement.
The pipe schedule indicates the wall thickness range associated with a particular nominal pipe size. Stainless Steel 316H Seamless Pipes can be supplied in different schedules depending on pressure, temperature, mechanical and dimensional requirements.
| Schedule | Typical Application |
|---|---|
| SCH 5S | Light-wall process and utility applications |
| SCH 10S | General process and industrial piping |
| SCH 40S | General industrial and process service |
| SCH 80S | Higher-pressure and demanding service |
| SCH 160 | Heavy-wall and higher-pressure applications |
Schedule availability depends on nominal pipe size and applicable dimensional standards. The required wall thickness should be selected based on design calculations and project specifications rather than schedule designation alone.
ASTM A312 TP316H Seamless Pipe is manufactured from Type 316H austenitic stainless steel for specified corrosive and high-temperature service. The specification covers seamless, welded and heavily cold-worked austenitic stainless steel pipe for applications where corrosion resistance and suitable elevated-temperature properties are required.
SS 316H Seamless Pipe is identified by UNS S31609 and contains chromium, nickel and molybdenum as major alloying elements. The molybdenum addition contributes to improved resistance to localized corrosion compared with conventional chromium-nickel stainless steel grades.
Kamal Steels supplies ASTM A312 TP316H pipes in applicable sizes, schedules, lengths, finishes and inspection conditions according to customer and project requirements.
Stainless Steel 316H is an austenitic chromium-nickel-molybdenum stainless steel grade with a controlled higher carbon content than standard 316L. Its alloy composition contributes to corrosion resistance, strength and performance in suitable elevated-temperature applications.
| Element | Typical / Specified Range |
|---|---|
| Carbon (C) | 0.04–0.10% |
| Chromium (Cr) | 16.0–18.0% |
| Nickel (Ni) | 10.0–14.0% |
| Molybdenum (Mo) | 2.0–3.0% |
| Manganese (Mn) | 2.00% max. |
| Silicon (Si) | 1.00% max. |
| Phosphorus (P) | 0.045% max. |
| Sulfur (S) | 0.030% max. |
Mechanical properties such as tensile strength, yield strength and elongation depend on the applicable product specification, dimensions and material condition. The applicable ASTM or ASME specification should be referred to for the required mechanical property values.
Stainless Steel 316H Seamless and Welded Pipes are both used in industrial piping, but their manufacturing processes are different. Seamless pipe is produced from a solid billet, while welded pipe is manufactured from stainless steel strip or plate that is formed and joined along a seam.
| Feature | SS 316H Seamless Pipe | SS 316H Welded Pipe |
|---|---|---|
| Manufacturing | Produced from a solid billet | Formed from strip or plate and welded |
| Longitudinal Weld | No longitudinal weld seam | Contains a welded seam |
| Typical Use | Specified pressure and demanding process services | Process, structural and general industrial services |
| Size Availability | Available across applicable seamless pipe sizes | Wide range of larger diameters and wall thicknesses |
The appropriate product type should be selected according to pressure, temperature, corrosion conditions, dimensional requirements, applicable standard and project specifications.
Stainless Steel 316H Seamless Pipes are used across industrial sectors where corrosion resistance, mechanical strength and suitable elevated temperature performance are required. Their chromium-nickel-molybdenum composition makes them suitable for selected process and demanding industrial environments.
Industry: Oil & Gas
Application: Process piping, utility lines, fluid transfer and plant service systems.
Industry: Chemical Processing
Application: Corrosive fluid handling, process lines and chemical transfer systems.
Industry: Petrochemical
Application: Process piping, equipment connections and plant utility systems.
Industry: Power Generation
Application: High-temperature process piping and equipment service applications.
Industry: Pharmaceutical
Application: Process piping, utility systems and corrosion-resistant fluid handling.
Industry: Marine & Offshore
Application: Corrosion-resistant piping, seawater-related systems and offshore equipment.
Stainless Steel 316H Seamless Pipe is a high-carbon version of SS 316 designed for elevated temperature service. It offers improved creep strength and high-temperature resistance compared to standard SS 316 and SS 316L grades.
SS 316H contains higher carbon content for improved high-temperature strength, while SS 316L has lower carbon content and is preferred for welding applications requiring enhanced corrosion resistance.
SS 316H Seamless Pipes are commonly manufactured according to ASTM A312, ASME SA312 and related international specifications.
TP316H Pipes are used in refineries, petrochemical plants, power stations, heat exchangers, boiler systems, offshore installations and chemical processing facilities.
Yes. SS 316H is specifically designed for elevated temperature service and offers better creep resistance and strength than standard SS 316 grades.
SS 316H Seamless Pipes are available in sizes ranging from 1/8" NB to 24" NB with various schedules including SCH 10S, SCH 40S and SCH 80S.
Common tests include PMI testing, hydrostatic testing, ultrasonic testing, eddy current testing, flattening tests and dimensional inspections.
Yes. SS 316H Pipes are generally supplied with Mill Test Certificates (MTC) and inspection reports to ensure traceability and quality compliance.
Equivalent designations include UNS S31609, ASTM A312 TP316H and JIS SUS316H depending on the applicable international standard.
Kamal Steels supplies ASTM A312 TP316H Seamless Pipes in various sizes, schedules and wall thicknesses with worldwide delivery and competitive pricing.