JIS G3455 Grade STS 370 Pipe | High-Pressure Carbon Steel Tubes

Expert provider and exporter focused in JIS G3455 Grade STS 370 Pipe, the strong choice for high-performance Carbon Steel Seamless Pipes & Tubes developed for demanding high-pressure operations, Amardeep Steel Centre is Essential parts of major systems like power production, boiler construction, shipbuilding, oil and gas infrastructure are these pipelines.

Celebrated for their great strength, durability, and dependability of heat resistance, our STS 370 pipes tightly follow the Japanese Industrial Standard (JIS) G3455. We guarantee exceptional dimensional correctness and mechanical stability, therefore ensuring that every pipe supplied satisfies strict quality criteria for consistent, high-level performance in demanding operating conditions.

What is the JIS G3455 Grade STS 370 Pipe?

Under the Japanese Industrial Standard, JIS G3455 Grade STS 370 specifies a particular type of carbon steel seamless pipe explicitly intended for high-pressure service. Essential traits include:

Standard Compliance: Made according to JIS G3455's exact specifications.
Material Focus: Often paired with high temperatures (usually up to 350°C), carbon steel developed for uses involving considerable pressure.
STS 370 Designation: Indicates certain chemical composition and mechanical characteristics, especially a minimum tensile strength objective corresponding with its name (usually around 370 N/mm², though the standard defines a range).
Seamless Manufacturing: The flawless manufacturing method removes welds, therefore improving wall uniformity, dimensional tolerances, structural integrity, and natural leak-proof performance all of which are absolutely vital for pressure control.
Application Suitability: Trusted for under high pressure steam, gas, water, oil, and other fluids in boilers, heat exchangers, power plants, and industrial pipe systems.
Key Properties: assures dependability and extended service life by providing a good mix of strength, toughness, weldability, and machinability.

Selecting JIS G3455 Grade STS 370 guarantees adherence to a recognised safety and performance criteria for high-pressure pipework.

JIS G3455 Grade STS 370 Pipe Specifications

Specification	Details
Standard	JIS G3455
Grade	STS 370
Product Type	Seamless Carbon Steel Pipes & Tubes
Manufacturing	Seamless (Hot Finished or Cold Finished)
Material	Carbon Steel
Size Range (NB)	1/8” NB to 24” NB (6A to 600A) - Custom sizes readily available
Wall Thickness	Schedule (SCH) 10 through SCH 160, STD, XS, XXS / As per customer requirement
Length	Single Random Length (SRL: 4-6m), Double Random Length (DRL: 10-12m), Custom Cut-to-Lengths
End Finish	Plain End (PE), Beveled End (BE), Threaded Ends (NPT, BSPT)
Surface Finish	Bare (Self-Colour), Black Varnish/Painted, Oiled, Hot-Dip Galvanized (HDG), Specific Anti-Corrosion Coatings
Tensile Strength	410 - 540 MPa (Typical Range for STS 370)
Yield Strength	Min. 245 MPa (Minimum requirement for STS 370)
Testing	Hydrostatic Testing, Non-Destructive Testing (NDT: UT, ET, MPI), Dimensional & Visual Inspection, Mechanical Tests (Tensile, Flattening, Bending)
Applications	High-Pressure Piping, Boilers, Superheaters, Heat Exchangers, Power Plants, Shipbuilding, Refineries

Industry Standards & Certifications Compliance

Every JIS G3455 STS 370 Pipe guaranteed by Amardeep Steel Centre satisfies strict quality criteria and follows pertinent international standards:

Standard/Certification	Compliance Status
JIS G3455 (Japanese Industrial Standard)	Yes
ISO 9001:2015 (Quality Management System)	Certified
ISO 14001 (Environmental Management System)	Certified
OHSAS 18001 / ISO 45001 (Health & Safety)	Certified
ASME B36.10M (Pipe Dimensions)	Yes
Relevant ASTM Standards (e.g., A106 Comparison)	Technically Similar
Relevant EN Standards (e.g., EN 10216-1/2)	Technically Similar
PED 2014/68/EU (Pressure Equipment Directive)	Available on Request

Mill Test Certificates (MTC) as per EN 10204 3.1 are supplied with all pipes, ensuring full traceability.

Chemical Composition (% Weight)

Element	Symbol	Content (%)
Carbon	C	≤ 0.25
Manganese	Mn	0.30 – 0.90
Silicon	Si	0.10 – 0.35
Phosphorus	P	≤ 0.035
Sulfur	S	≤ 0.035
Iron	Fe	Balance

(Composition adheres to JIS G3455 standard for STS 370)

Mechanical Properties of JIS G3455 STS 370 Pipes

Property	Value	Test Condition / Note
Tensile Strength	410 - 540 MPa	As per JIS Z 2241
Yield Strength (0.2% Offset)	≥ 245 MPa	As per JIS Z 2241
Elongation	≥ 25% (Longitudinal, No.11/12 Test Piece)	As per JIS Z 2201 / Z 2241
Hardness (Reference)	≤ 190 HBW	Optional Test
Impact Strength (Optional)	≥ 27 J (at -20°C or specified temp)	Charpy V-Notch, if required
Modulus of Elasticity	Approx. 200 GPa	Reference Value

Key Benefits of JIS G3455 STS 370 Seamless Tubes

Leveraging our STS 370 pipes provides distinct advantages for your projects:

High Strength & Pressure Resistance: In high-pressure conditions, excellent tensile (410-540 MPa) and yield (min 245 MPa) strength guarantees dependable operation.
Superior Dimensional Accuracy: Perfect roundness, consistent wall thickness, and tight tolerances absolutely necessary for exact fits and system integrity are guaranteed by seamless production.
Thermal Stability: Designed to preserve structural integrity and performance during typical boiler and steam application extreme temperatures and thermal cycles.
Enhanced Durability: Good resistance to wear and operating pressures comes from robust carbon steel structure. Surface treatments give extra defense against scale and corrosion.
Low Maintenance & Longevity: The natural durability and quality result in longer service life, therefore lowering the frequency and expense of replacements or repairs.
Good Fabricability: well-known for machinability and high weldability, so facilitating simpler system assembly and modification.

Common Applications

Essential parts in many high-pressure systems are JIS G 3455 STS 370 pipes:

Power Generation: Boiler feedwater lines, main steam pipework, superheater and reheater tubes.
Boilers & Heat Exchangers: Industrial heat exchanger tubing, condenser pipes, high-pressure boiler tubes.
Petrochemical & Refineries: Process piping for high pressure and temperature gas and fluid handling.
Shipbuilding: hydraulic systems, high-pressure steam lines, and other vital piping aboard marine vessels.
Oil & Gas: High-pressure rating onshore and offshore processing plant pipework.
Industrial Process Piping: Systems for chemical factories, paper mills, and other businesses needing strong pressure plumbing.
Water Treatment: industrial water treatment plant high-pressure sections.

Why Choose Amardeep Steel Centre for JIS G3455 STS 370 Pipes?

Amardeep Steel Centre offers outstanding JIS G3455 STS 370 Carbon Steel Seamless Pipes by combining sophisticated manufacturing capacity with thorough industry knowledge:

Unmatched Quality Assurance: produced under rigorous quality control standards, satisfying exact mechanical and dimensional criteria of JIS G3455.
Extensive Inventory & Customization: Plenty of basic sizes, together with complete flexibility for individual surface treatments, thicknesses, and bespoke lengths and widths.
Global Supply Chain: Verified experience exporting internationally to guarantee prompt delivery, effective logistics, and accurate documentation.
Technical Expertise: For technical clarifications, compliance validation, and material choice, our knowledgeable staff offers great help.
Competitive Pricing: Our reasonably priced, top quality Japanese standard pipes give great value.
Reliable Partnership: We promise to establish long-term relationships by means of continuous quality, dependable service, and thorough support.

Choose Amardeep Steel Centre for high-performance seamless piping solutions built for safety and longevity.

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Frequently Asked Questions (FAQ)

1. Is JIS G3455 STS 370 specifically suitable for boiler applications?

Indeed, completely. Because of their intended thermal resistance and mechanical strength, JIS G3455 STS 370 pipes are extensively specified and utilized for many boiler components, main steam lines, and other high-pressure, high-temperature piping systems inside power plants and industrial boiler settings.

2. Can Amardeep Steel provide third-party inspection (TPI) certificates?

Yes. Based on client needs, we enable third-party inspections by recognized companies such as Bureau Veritas (BV), SGS, TUV, Lloyd's Register, DNV GL, etc.). We will send the official TPI report together with the cargo.

3. Are custom sizes readily available for JIS G3455 STS 370 Pipes?

Yes, we offer full customization in terms of length, wall thickness, and surface treatment based on client specifications.

4. What are the standard surface treatment options for these pipes?

Pipes can be delivered with various finishes depending on your needs: Bare (self-colour with potential light oiling), Black Painted/Varnished for temporary protection, Hot-Dip Galvanized for enhanced corrosion resistance, or specific anti-corrosion coatings as requested.

5. How are the JIS G3455 STS 370 Pipes packaged for shipment?

To ensure safe transportation, pipes are typically packed securely in hexagonal bundles using steel straps. Pipe ends are protected with plastic caps. The bundles are often wrapped with waterproof material (like hessian cloth or plastic wrapping) to prevent environmental damage during transit. Custom packaging requests can also be accommodated.