In India, Kalpataru Piping has established itself as a major manufacturer, supplier, and exporter of carbon steel products, focusing on carbon steel A106 seamless pipes, A53 Gr B, and API 5L Gr B seamless pipes and tubes. As a prominent stockist of carbon steel A106 seamless pipes, the firm provides pipes that can endure extreme values of temperature and pressure in the oil and gas, petrochemical, energy generation, and engineering sectors. In addition to seamless pipes, the company also offers carbon steel welded pipes and tubes, thereby enabling its clients to procure all varieties of carbon steel piping products from a single source. The products are manufactured according to the highest standards of ASTM A106, ASTM A53, and API 5L, thus ensuring highly accurate wall thickness, strength, and dimensional accuracy. Whether clients are in need of a carbon steel plate or sheet along with the pipes or carbon steel buttweld fittings like carbon steel flanges, the company provides high-quality items along with related documents at an attractive cost.
Table of Contents
- What Are A106 Gr B / A53 Gr B / API 5L Gr B Pipes?
- Technical Specifications
- Chemical Composition (Carbon Steel A106 Gr B / A53 Gr B / API 5L Gr B)
- Mechanical Properties
- Applications & Industries We Serve
- Advantages of Carbon Steel A106 Gr B / A53 Gr B / API 5L Gr B Pipes
- A106 Gr B vs A53 Gr B vs API 5L Gr B — Comparison
- Our Quality Assurance Process
- Certifications & Standards Compliance
- FAQ’s About Carbon Steel A106 Seamless Pipes
What Are A106 Gr B / A53 Gr B / API 5L Gr B Pipes?
ASTM A106 Grade B is the globally recognised specification for seamless carbon steel pipe intended for high-temperature service in refineries, boilers, and power plants. Because the pipe is produced without a weld seam, carbon steel A106 seamless pipes offer superior strength and pressure-handling capability compared with welded alternatives, making them the preferred choice wherever hot fluids or gases are transported under demanding conditions.
ASTM A53 Grade B is a closely related specification covering both seamless and welded carbon steel pipe used for mechanical and pressure applications, while API 5L Grade B is the petroleum industry’s line-pipe standard for transporting oil, gas, and water. Kalpataru Piping stocks and exports pipe manufactured to all three standards, drawn from the same high-grade carbon steel products range that also supplies our carbon steel round bars and wires, carbon steel forged fittings, and carbon steel fasteners divisions, so your entire piping system can be sourced from one accountable supplier.
Technical Specifications
|
Specification |
Details |
|---|---|
|
Standards / Grades |
ASTM A106 Gr B, ASTM A53 Gr B, ASME SA106/SA53 Gr B, API 5L Gr B, PSL1 & PSL2 |
|
Size Range |
1/8″ NB – 26″ NB (API 5L X42–X60: 2″–24″) |
|
Schedules |
20, 30, 40, Standard (STD), Extra Heavy (XH), 80, 100, 120, 140, 160, XXH |
|
Type |
Seamless, ERW, EFW, DSAW/SAW, LSAW |
|
Wall Thickness (ERW/EFW) |
0.120″ – 1.000″ (non-schedule: .120, .156, .188, .203, .219 wall etc.) |
|
End Finish |
Plain End, Beveled End, Threaded |
|
Length |
Single Random, Double Random, Custom up to 12 m |
|
Surface Finish |
Bare, Oiled, Mill Varnish, Galvanized, FBE, 3LPE, 3LPP, Coal Tar, Concrete Coating |
|
Test Certification |
EN 10204 3.1 / 3.2 Mill Test Certificate, third-party inspection on request |
Mechanical Properties
|
Property |
Value |
|---|---|
|
Ultimate Tensile Strength |
60,000 psi min (415 MPa) |
|
Yield Strength (0.2%) |
35,000 psi min (240 MPa) |
|
Elongation |
30% min |
|
Reduction of Area |
22% min |
|
Hardness |
187 HBW max |
|
Property |
Value |
|---|---|
|
Ultimate Tensile Strength |
60,000 psi min (415 MPa) |
|
Yield Strength (0.2%) |
35,000 psi min (240 MPa) |
|
Elongation |
30% min |
|
Reduction of Area |
22% min |
|
Hardness |
187 HBW max |
Advantages of Carbon Steel A106 Gr B / A53 Gr B / API 5L Gr B Pipes
|
Advantage |
Why It Matters |
|---|---|
|
High-Temperature Reliability |
Rated for elevated-temperature service in boilers and refineries |
|
Seamless Strength |
No weld seam means higher pressure tolerance and fewer failure points |
|
Dimensional Consistency |
Tight ASME B36.10M tolerances ensure predictable fit-up |
|
Multiple Grade Options |
A106, A53 and API 5L Gr B cover mechanical, line-pipe, and process needs |
|
Wide Size & Schedule Range |
One supplier covers small-bore instrumentation to large structural pipe |
|
Global Compliance |
Mill certificates and third-party inspection support export projects |
A106 Gr B vs A53 Gr B vs API 5L Gr B — Comparison
| Parameter | ASTM A106 Gr B | ASTM A53 Gr B | API 5L Gr B |
|---|---|---|---|
| Primary Use | High-temperature service (boilers, refineries) | Mechanical & pressure piping, structural | Oil & gas line pipe (onshore/offshore) |
| Construction | Seamless only | Seamless or welded (ERW) | Seamless, ERW, SAW, DSAW |
| Silicon Requirement | Min 0.10% | No minimum specified | Not specified (PSL1/PSL2 based) |
| Typical Industry | Refineries, power plants | General construction, plumbing | Pipeline transportation |
Applications & Industries We Serve
- Oil, gas & petrochemical pipelines and process piping
- Refineries and high-temperature/high-pressure steam lines
- Power generation — nuclear and thermal boiler piping
- Shipbuilding and marine piping systems
- Water and mineral slurry transmission lines
- Structural and general engineering fabrication
- Automobile manufacturing and machine building
- Chemical processing plants
Our Quality Assurance Process
- Sourcing from certified carbon steel mills with full chemical and mechanical traceability
- In-process inspection of every production stage — dimensional, wall thickness, and surface checks
- Testing per standard: hydrostatic, flattening, bending, impact, ultrasonic, and eddy current tests as applicable
- Mill Test Certificates (MTC) as per EN 10204 3.1 / 3.2 issued with every consignment
- Optional third-party inspection (SGS, BV, TÜV, Lloyd’s) available on request
- Careful export packing in wooden boxes, plastic bags, or steel-strip bundling to prevent transit damage
Certifications & Standards Compliance
- ISO 9001:2015 certified quality management
- PED / CE certified operations for European Pressure Equipment Directive compliance
- API 5L approved manufacturing and supply practices
- Compliance with ASTM, ASME, and API international standards
FAQ’s About Carbon Steel A106 Seamless Pipes
What is carbon steel A106 Gr B pipe used for?
Carbon steel A106 Gr B pipe is used for high-temperature and high-pressure service in refineries, power plants, boiler systems, and industrial process piping where reliable seamless construction is required.
What is the difference between A106 Gr B and A53 Gr B pipe?
A106 Gr B is manufactured only as seamless pipe for high-temperature service, while A53 Gr B is available as both seamless and welded pipe for general mechanical and structural applications.
What size range do you supply for carbon steel A106 seamless pipes?
Kalpataru Piping supplies carbon steel A106 seamless pipes from 1/8″ NB to 26″ NB, across schedules ranging from Schedule 10 to XXH, with custom lengths available on request.
Do you provide mill test certificates with every order?
Yes, every consignment of A106 Gr B, A53 Gr B, and API 5L Gr B pipe is supplied with EN 10204 3.1 or 3.2 mill test certificates, and third-party inspection can be arranged on request.
What industries commonly use API 5L Gr B pipe?
API 5L Gr B pipe is primarily used in the oil and gas industry for pipeline transportation of crude oil, natural gas, and water, both onshore and offshore.
Can Kalpataru Piping supply custom sizes and non-standard wall thickness?
Yes, we offer customised sizes, non-schedule wall thicknesses (such as .120, .156, .188, .203, and .219 wall), and tailored lengths to match your exact project specification.
Do you export carbon steel A106 Gr B pipes internationally?
Yes, Kalpataru Piping exports carbon steel A106 Gr B, A53 Gr B, and API 5L Gr B pipes to over 80 countries, with complete documentation, packing, and shipping support.
