Home > Seamless Pipe > ASTM A53 / ASME SA53 Pipe
Grades: A & B — Black & Galvanized (GI) • Seamless & ERW Pipes
Inox Steel India is a leading manufacturer, stockist, and global exporter of ASTM A53 / ASME SA53 Carbon Steel Pipes, offering high-quality Seamless, ERW, and Hot-Dip Galvanized pipes for structural, fluid, and low-pressure applications. With decades of expertise, we supply A53 Grade A & Grade B pipes to industries across GCC, Middle East, Africa, Europe, USA & South America.
Our ASTM A53 pipes are manufactured using high-grade carbon steel billets and coils, produced through hot finishing, ERW welding, and furnace-welding techniques. Our in-house testing ensures every pipe meets the dimensional, pressure, and performance requirements of ASTM/ASME standards.
Each Inox Steel India-branded ASTM A53 Pipe goes through hydrostatic testing, non-destructive testing, bend testing, coiling tests, and surface inspection, ensuring long-term reliability and leak-free performance.
The pipes are widely used in water lines, structural supports, mechanical systems, low-pressure pipelines, fire-fighting systems, general engineering, HVAC systems, and gas distribution where durability, weldability, and cost efficiency are important.
ASTM A53 (also ASME SA53) is a specification for Seamless, ERW, and Furnace-Welded Carbon Steel Pipes, suitable for:
It is widely used due to its versatility, affordability, and availability in both black and galvanized (GI) surfaces.
This ensures ASTM A53 pipes from Inox Steel India meet the highest standards of strength, durability, and weldability.
| Grade | UNS | Strength Level | Standard |
|---|---|---|---|
| A53 Grade A | K02504 | Low strength, high ductility | ASTM A53 / ASME SA53 |
| A53 Grade B | K02505 | Higher strength & pressure service | ASTM A53 / ASME SA53 |
| Parameter / Property | ASTM A53 Grade A | ASTM A53 Grade B |
|---|---|---|
| Material Type | Carbon Steel | Carbon Steel |
| Standard | ASTM A53 / ASME SA53 | ASTM A53 / ASME SA53 |
| Pipe Types | Seamless, ERW, Furnace-Welded | Seamless, ERW, Furnace-Welded |
| Material Class | Low Carbon Steel | Medium Carbon Steel |
| Application Type | Structural & low-pressure fluid systems | Higher pressure fluid service |
| Density | 7.85 g/cm³ | 7.85 g/cm³ |
| Tensile Strength (MPa) | 330 Min | 415 Min |
| Yield Strength (MPa) | 205 Min | 240 Min |
| Elongation (%) | 25–30% | 20–25% |
| Hardness (HB) | 132 Max | 187 Max |
| Chemical Composition (Typical) | C 0.25 Max, Mn 0.95 Max | C 0.30 Max, Mn 1.20 Max |
| Sulphur (S) Max | 0.035 | 0.035 |
| Phosphorus (P) Max | 0.035 | 0.035 |
| Silicon (Si) | – | 0.10 Min |
| Manufacturing Method | Seamless (Hot Finished) / ERW | Seamless (Hot Finished) / ERW |
| Equivalent Grades | API 5L Grade A | API 5L Grade B |
| Available Sizes (NPS) | ½″ – 36″ | ½″ – 36″ |
| Schedules | SCH 10 – XXS | SCH 10 – XXS |
| End Finishes | Plain, Threaded, Bevelled | Plain, Threaded, Bevelled |
| Surface Finish | Black, Galvanized | Black, Galvanized |
| Testing Requirements | Hydrotest, NDT, Bend Test | Hydrotest, NDT, Bend Test |
| Suitable For | Structural & low-pressure service | Fluid & pressure service |
| HS Code / HSN Code | 7306.30.90 (Welded) / 7304.31.90 (Seamless) | 7306.30.90 / 7304.31.90 |
| Certifications | EN 10204 3.1 / 3.2, IBR | EN 10204 3.1 / 3.2 |
Seamless vs ERW
Black vs Galvanized (GI) Finish
Grade Selection
Application Requirements
Pressure, temperature, media (water, air, gas), and corrosion exposure decide grade & finish.
Certification & Testing
Ensure pipes are supplied with:
India:
High demand for fire-fighting systems, plumbing, structural fabrication, HVAC, and mechanical engineering.
Middle East:
UAE, Qatar, Saudi Arabia use A53 extensively for:
Africa:
Kenya, Nigeria, Ghana, South Africa import A53 GI pipes for water distribution & construction.
Europe & Americas:
Used in large-scale structural frames, mechanical supports, and gas distribution.
Inox Steel India supplies A53 pipes worldwide through JNPT, Mundra & Hazira ports.
ASTM A53 / ASME SA53 Carbon Steel Pipes from Inox Steel India are widely used for structural, mechanical, low-pressure fluid, and water/gas conveyance applications. Available in Seamless, ERW, Black, and Hot-Dip Galvanized (GI) finishes, these pipes deliver strength, affordability, weldability, and long service life.
Below is the grade-wise application guide, dimensional chart, indicative price list, and quality control — all written in the same format you require.
ASTM A53 Grade A – Structural & Low-Pressure Pipe
Service Use:
Low pressure / low temperature fluid lines, structural applications, and fabrication.
Typical Applications:
Size Range:
½″ – 36″ NPS (SCH 10 to SCH 80)
Temperature Range:
Ambient to low-temperature service
Industry Sectors:
Construction | Fabrication | Fire-Fighting | Mechanical | Agriculture
ASTM A53 Grade B – Pressure & Mechanical Pipe
Service Use:
Higher strength and suitable for water, air, gas, and pressure systems.
Typical Applications:
Size Range:
½″ – 36″ NPS (SCH 10 to XXS)
Temperature Range:
Up to ~260°C
Industry Sectors:
Oil & Gas | HVAC | Fire-Fighting | Construction | Utilities
| NPS (Inch) | OD (mm) | Wall Thickness (SCH 40) | Approx. Weight (kg/m) |
|---|---|---|---|
| ½″ | 21.3 | 2.77 | 1.27 |
| ¾″ | 26.7 | 2.87 | 1.68 |
| 1″ | 33.4 | 3.38 | 2.73 |
| 1½″ | 48.3 | 3.68 | 4.07 |
| 2″ | 60.3 | 3.91 | 5.44 |
| 3″ | 88.9 | 5.49 | 10.88 |
| 4″ | 114.3 | 6.02 | 14.98 |
| 6″ | 168.3 | 7.11 | 28.26 |
| 8″ | 219.1 | 8.18 | 41.95 |
| 10″ | 273.1 | 9.27 | 62.42 |
| Grade / Standard | Type | Avg. Price INR/kg (FOB Mumbai) | Approx. USD/kg (FOB India) | Typical Use |
|---|---|---|---|---|
| A53 Grade A | Black / ERW | ₹ 62 – ₹ 72 | $0.75 – $0.90 | Structural & fabrication |
| A53 Grade A | Hot-Dip GI | ₹ 75 – ₹ 92 | $0.95 – $1.20 | Water & outdoor pipelines |
| A53 Grade B | Black / ERW | ₹ 68 – ₹ 80 | $0.85 – $1.00 | Pressure & mechanical |
| A53 Grade B | GI / Galvanized | ₹ 85 – ₹ 110 | $1.10 – $1.35 | Water / fire-fighting |
Seamless Pipes:
✔ HSN 7304.31.90
Welded/ERW/GI Pipes:
✔ HSN 7306.30.90
Applicable to A53 Grade A & B.
Every ASTM A53 pipe undergoes thorough inspection and testing to ensure its suitability for structural and pressure applications.
Quality Tests Conducted:
Documentation Supplied:
This ensures ASTM A53 pipes from Inox Steel India meet the highest structural and mechanical performance standards.
Inox Steel India is one of India’s most trusted suppliers of ASTM A53 / ASME SA53 Grade A & Grade B pipes, delivering superior quality carbon steel pipes for structural, mechanical, and low-pressure fluid systems. With stringent quality control, extensive inventory, and global export capability, we ensure consistent performance and on-time delivery for every order.
Key Reasons to Choose Inox Steel India:
Inox Steel India ensures reliable, cost-effective, and long-life carbon steel piping solutions for every application.
| Industry | Application | Preferred Grade |
|---|---|---|
| Construction & Fabrication | Structural supports, frames | A |
| Fire-Fighting Systems | GI piping, hydrant lines | A / B |
| Water Supply & Plumbing | Potable water & drainage | A / B (GI) |
| Oil & Gas | Low-pressure lines & vents | B |
| HVAC & Chilled Water | Chilled water pipes, coil circuits | B |
| Agriculture & Irrigation | Water flow & sprinkler lines | A (GI) |
| Industrial Engineering | Mechanical & compressed air lines | B |
| EPC Projects | Piping fabrication & structural steel | A / B |
Export Packaging & Supply Readiness
To ensure damage-free and corrosion-free delivery, all ASTM A53 pipes from Inox Steel India are packed using export-grade standards:
🌍 Major Export Destinations:
UAE • Saudi Arabia • Qatar • Oman • Kuwait • Egypt • Nigeria • South Africa • UK • Italy • Germany • USA • Canada • Mexico • Brazil
If you’re searching for an ASTM A53 Grade A/B pipe supplier near Alankar Cinema, Mumbai, Inox Steel India is your ideal partner.
We offer:
Our central Mumbai facility ensures quick service for local and global customers.
Get expert guidance, technical selection support, and a detailed quotation within 24 hours.
📥 Downloads Available:
Datasheet • GI Certificate • Price List • Schedule Chart • Piping Catalog (PDF)
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in
+91 9930796690
Inox Steel India
Email
Phone
Yes — especially A53 GI pipes due to corrosion resistance.
Yes — regular shipments to GCC, Africa, Europe & Americas.
Yes — SGS, BV, TUV, DNV available on request.
Yes — 1m, 3m, 6m, 12m and custom lengths available.
Inox Steel India supplies premium-quality ASTM A53 Grade A & Grade B Seamless, ERW & GI Pipes, suitable for structural, water, mechanical, and low-pressure service.
If your project requires reliable performance, quality testing, and competitive pricing — we are ready to serve.