Stainless Steel Header Plug Manufacturer & Supplier
Jade Alloys is a leading Stainless Steel Header Plug Manufacturer and Supplier in India. Our SS Header Plugs are precision-forged and machined components used to seal tube-sheet bores in heat exchangers, air-cooled heat exchangers (ACHEs), boilers, and manifold headers. Each plug is manufactured from certified mill material ASTM A182 grades F304, F316, F321, and F347 and precision-machined to ASME B16.11 dimensional standards.
As a category, Stainless Steel Header Plugs offer a compelling combination of corrosion resistance, mechanical strength, high-temperature performance, and hygienic surface finish. They are the preferred sealing solution across industries including oil & gas, petrochemical, power generation, and food processing.
We maintain ready stock across all major SS grades, pressure classes (2000–9000 LBS), sizes (1/8″ to 4″), and thread standards (NPT, BSP, BSPT, UNF). Custom sizes, special testing, and third-party inspection are available on request.
Quick Section Links
- Why Choose Jade Alloys for SS Header Plugs?
- Stainless Steel Header Plugs by Grade
- Stainless Steel Header Plug Specifications
- Chemical Composition of SS Header Plug Grades
- Mechanical Properties of Stainless Steel Shoulder Plugs
- Equivalent Grades of Stainless Steel Header Plugs
- Advantages of Stainless Steel Header Plugs
- Applications of SS Header Plugs
- Related Products
- Frequently Asked Questions
- Countries We Export
Why Choose Jade Alloys for SS Header Plugs?
We combine manufacturing expertise with large ready stock and global logistics to ensure fast, reliable supply.
- ASTM A182 / ASME SA182 certified mill material
- ASME B16.11, MSS SP-79/83/95 compliant dimensions
- EN 10204 3.1 MTCs as standard; 3.2 on request
- Full range of thread forms: NPT, BSP, BSPT, UNF
- Pressure classes 2000 / 3000 / 6000 / 9000 LBS
- NACE MR0175 / ISO 15156 compliant grades available
- Ready stock – fast dispatch worldwide
- Third-party inspection: Bureau Veritas, SGS, TÜV
Stainless Steel Header Plugs by Grade
Each stainless grade has been selected to address specific service conditions from general corrosive environments to high-temperature sensitisation concerns. Explore each grade page for full technical data, specifications and inventory.
Stainless Steel 304 Header Plug
The most widely used stainless grade. Excellent corrosion resistance in a broad range of environments. Cost-effective for general industrial, food processing, and chemical service. Also available in 304L (low carbon) and 304H (high carbon) variants for elevated temperature.
Stainless Steel 316 Header Plug
Superior chloride corrosion resistance due to 2–3% molybdenum addition. The preferred grade for marine, offshore, coastal plant, and chemical environments with chloride exposure. 316L variant recommended for welded applications to prevent sensitisation.
Stainless Steel Header Plug Specifications
The following dimensional and standards specifications apply across all Stainless Steel Header Plug grades supplied by Jade Alloys.
| Parameter | Detail |
|---|---|
| Material Standard | ASTM A182 / ASME SA182 – Grade F304, F304L, F304H, F316, F316L, F321, F321H, F347, F347H |
| Plug Type | Hex Shoulder Plug / Threaded Plug / Blind Plug / Socket Weld Plug / Forged Hex Plug |
| Dimensional Standard | ASME B16.11 · MSS SP-79 · MSS SP-83 · MSS SP-95 · MSS SP-97 · BS 3799 |
| Pressure Class | 2000 LBS · 3000 LBS · 6000 LBS · 9000 LBS |
| Size Range (NPS) | 1/8″ to 4″ · Larger sizes available on request |
| Thread Standard | NPT (ANSI B1.20.1) · BSP · BSPT · UNF · NPSM · Metric ISO 965 |
| Max Service Temperature | SS 304/316: up to 870°C (intermittent); SS 321/347: up to 925°C continuous |
| Surface Finish | As Machined · Electro-polished · Passivated · Pickled & Passivated |
| Test & Inspection | Hardness · Hydrostatic · Dye Penetrant (PT) · Magnetic Particle (MT) · Chemical Analysis · PMI |
| Certifications | EN 10204 3.1 (standard) · 3.2 (on request) · PED · NACE MR0175 / ISO 15156 |
Chemical Composition of SS Header Plug Grades
The table below shows the key elemental composition ranges for the most commonly supplied Stainless Steel Header Plug grades per ASTM A182.
| Grade | C (Max) | Cr (%) | Ni (%) | Mo (%) | Ti / Nb | Mn (Max) |
|---|---|---|---|---|---|---|
| SS 304 | 0.08 | 18.00–20.00 | 8.00–10.50 | — | — | 2.00 |
| SS 304L | 0.035 | 18.00–20.00 | 8.00–12.00 | — | — | 2.00 |
| SS 304H | 0.04–0.10 | 18.00–20.00 | 8.00–10.50 | — | — | 2.00 |
| SS 316 | 0.08 | 16.00–18.00 | 10.00–14.00 | 2.00–3.00 | — | 2.00 |
| SS 316L | 0.035 | 16.00–18.00 | 10.00–14.00 | 2.00–3.00 | — | 2.00 |
| SS 321 | 0.08 | 17.00–19.00 | 9.00–12.00 | — | Ti ≥ 5×C | 2.00 |
| SS 347 | 0.08 | 17.00–19.00 | 9.00–13.00 | — | Nb ≥ 10×C | 2.00 |
Mechanical Properties of Stainless Steel Shoulder Plugs
Minimum mechanical properties for SS Header Plug grades per ASTM A182. These values govern material acceptance and pressure-class suitability.
| Grade | Tensile Strength (Min) | Yield Strength (Min) | Elongation (Min) | Hardness (Max HBW) |
|---|---|---|---|---|
| SS 304 / 304H | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 30% | 187 |
| SS 304L | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 30% | 187 |
| SS 316 / 316H | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 30% | 187 |
| SS 316L | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 30% | 187 |
| SS 321 | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 30% | 187 |
| SS 321H | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 30% | 187 |
| SS 347 / 347H | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 30% | 187 |
Equivalent Grades of Stainless Steel Header Plugs
| Grade | UNS | EN / DIN | EN Number | JIS |
|---|---|---|---|---|
| SS 304 | S30400 | X5CrNi18-10 | 1.4301 | SUS 304 |
| SS 304L | S30403 | X2CrNi18-9 | 1.4307 | SUS 304L |
| SS 316 | S31600 | X5CrNiMo17-12-2 | 1.4401 | SUS 316 |
| SS 316L | S31603 | X2CrNiMo17-12-2 | 1.4404 | SUS 316L |
| SS 321 | S32100 | X6CrNiTi18-10 | 1.4541 | SUS 321 |
| SS 347 | S34700 | X6CrNiNb18-10 | 1.4550 | SUS 347 |
Advantages of Stainless Steel Header Plugs
Stainless Steel Header Plugs offer a superior combination of properties that make them the preferred choice across demanding industrial environments.
- Superior Corrosion Resistance: The chromium content (18–20%) forms a passive oxide film that provides excellent resistance to atmospheric, chemical, and acidic corrosion far exceeding carbon steel.
- High-Temperature Performance: Austenitic SS grades maintain mechanical strength and oxidation resistance at elevated temperatures. Stabilised grades (321, 347) are specifically designed for continuous high-temperature service.
- Hygienic & Easy to Clean: Smooth surface finish and passive oxide layer make SS Header Plugs ideal for food, beverage, pharmaceutical, and dairy processing applications requiring strict hygiene.
- Excellent Mechanical Strength: Stainless steel provides high tensile and yield strength, enabling use across all pressure classes (2000–9000 LBS) in demanding heat exchanger and pressure vessel services.
- Long Service Life: Corrosion and oxidation resistance translate directly to reduced maintenance frequency and longer service intervals, lowering total cost of ownership compared to alternative materials.
- Grade Selection Flexibility: With grades from 304 to 347H, SS Header Plugs can be precisely selected to match your exact service temperature, corrosion environment, and weldability requirements.
Applications of SS Header Plugs
Stainless Steel Header Plugs and SS Shoulder Plugs are used wherever corrosion resistance, temperature performance, and reliable sealing are required in tandem.
- Heat Exchanger Tube-Sheet Sealing
- Air Cooled Heat Exchanger (ACHE) Headers
- Boiler & Pressure Vessel Headers
- Manifold Sealing in Process Plants
- Refinery & Gas Processing Columns
- Superheater & Reheater Headers (SS 321/347)
- Food & Beverage Processing Equipment
- Pharmaceutical Process Systems
- Offshore Platform Heat Exchangers
- LNG / Gas Sweetening Units
- Chemical & Petrochemical Reactors
- Desalination & Water Treatment Plants
Frequently Asked Questions
What grades of Stainless Steel Header Plugs do you supply?
We supply SS 304, 304L, 304H, 316, 316L, 321, 321H, 347, and 347H grades per ASTM A182 / ASME SA182 standards.
What is the difference between SS 304 and SS 316 Header Plugs?
SS 316 contains 2–3% molybdenum, which provides superior chloride corrosion resistance compared to SS 304. SS 316 is preferred for marine, offshore, and coastal applications.
What pressure classes are available?
We manufacture Stainless Steel Header Plugs in 2000 LBS, 3000 LBS, 6000 LBS, and 9000 LBS pressure classes per ASME B16.11.
What thread types are available for SS Header Plugs?
We offer NPT, BSP, BSPT, UNF, NPSM, and Metric ISO 965 thread forms. Our technical team can help select the correct thread for your application.
Do you provide material test certificates?
Yes, we provide EN 10204 3.1 Material Test Certificates (MTCs) as standard. EN 10204 3.2 certificates are available on request for projects requiring third-party verification.
