Carbon Steel Pipe Specifications

Below is the specification range for carbon steel pipes across all grades and forms we carry.

Specification Details
Standards ASTM A106, ASTM A53, API 5L, ASTM A333
Grades A106 Gr. A/B/C, A53 Gr. A/B, API 5L Gr. B to X70
Size Range 1/2" to 48" NPS (DN 15 to DN 1200)
Wall Thickness SCH 5S, 10, 20, 30, 40 (STD), 60, 80 (XS), 100, 120, 140, 160, XXS
Length 6 m (20 ft), 12 m (40 ft), random, double random, cut-to-size
End Type Plain end, bevelled end, threaded, grooved
Surface Finish Black (mill finish), galvanised, FBE coated, 3LPE coated
Form Seamless, ERW, LSAW/DSAW, HSAW/Spiral

Size and Schedule Chart

OD and wall thickness values for the most ordered NPS sizes in Schedule 40 and Schedule 80 are listed here.

NPS (inches) OD (mm) SCH 40 Wall (mm) SCH 80 Wall (mm)
1/2" 21.3 2.77 3.73
1" 33.4 3.38 4.55
2" 60.3 3.91 5.54
3" 88.9 5.49 7.62
4" 114.3 6.02 8.56
6" 168.3 7.11 10.97
8" 219.1 8.18 12.70
10" 273.1 9.27 12.70
12" 323.8 10.31 12.70

Carbon Steel Pipe Price

Carbon steel pipe prices begin around fall between ₹80/kg. In other countries, it falls between $0.50 and $5.00 per kg, depending on grade, OD, wall thickness, and order volume. Seamless pipe carries a higher cost than ERW pipe at equivalent dimensions. API 5L X-grades also attract a premium over standard A53 or A106 material. Final pricing depends on specifications, surface finish, quantity, and current steel market conditions. Request a quote for current pricing.

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Carbon Steel Pipe Standards and Grades

Several international standards govern CS pipe production. The standard on a purchase order sets the grade options, chemistry limits, and mechanical thresholds.

For high-temperature service up to 400°C, ASTM A106 / ASME SA-106 is the controlling specification. It covers seamless pipe only. Three grades fall under it: Grade A at 48 ksi tensile, Grade B at 60 ksi, and Grade C at 70 ksi. Grade B dominates procurement.

ASTM A53 / ASME SA-53 is the most versatile CS pipe specification because it covers welded (Type E, Type F) and seamless (Type S) manufacturing under one standard. Grade B matches A106 Grade B in tensile and yield, making dual certification possible.

Oil, gas, and water pipelines require API 5L line pipe. The grade ladder starts at Grade B with 35 ksi yield and climbs through X42, X52, X60, X65, to X70 at 70 ksi yield.

Cold-formed structural steel tubing falls under ASTM A500. Grade B provides 58 ksi tensile and 45 ksi yield at minimum. Columns, trusses, and hollow structural sections are the primary use cases.

Low-temperature service down to -45°C calls for ASTM A333 Grade 6. LNG terminals and cold-climate pipelines are typical applications for this specification.

Types of Carbon Steel Pipes

CS pipes come in 5 manufacturing forms:

Seamless (SMLS)

Seamless (SMLS)

ERW (Electric Resistance Welded)

ERW (Electric Resistance Welded)

LSAW / DSAW

LSAW / DSAW (Longitudinal Submerged Arc Welded)

HSAW / Spiral Welded Pipe

HSAW / Spiral Welded (Helical Submerged Arc Welded)

HFW (High Frequency Welded)

HFW (High Frequency Welded)

Industrial Applications of Carbon Steel Pipes

CS pipes serve 6 major application sectors: oil and gas, structural construction, power generation, water and sewage, fire protection, and chemical processing.

Oil and Gas

API 5L grades carry crude oil, natural gas, and refined products across long-distance pipelines.

Structural Construction

In structural work, CS pipe is the preferred choice for columns, trusses, and load-bearing frames.

Power Generation

Power plants run ASTM A106 Grade B in steam lines and boiler circuits above 300°C.

Water and Sewage

ASTM A53 galvanised pipe handles municipal water and sewage systems.

Fire Protection

Fire protection sprinkler networks also call for A53 pipe with threaded or grooved ends.

Chemical Processing

Where stainless steel isn't cost-justified, chemical plants rely on coated CS pipe for fluid transfer.

Shipping & Packaging

Main export packaging setup Heavy-duty wooden boxes Packing
Export Packaging Standard

We strictly follow seaworthy export handling standards to protect carbon steel pipe from transit damage, moisture ingress, and surface contamination during long-distance dispatch.

  • Heavy-duty wooden boxes with moisture barrier lining
  • HDPE stretch film wrapping on all bundles
  • Plastic end caps on threaded and plain-end pipes
  • Silica gel desiccants to minimize moisture exposure
  • ISPM-15 fumigated wooden packaging for export
shipping preparation Pipe Bundle Yard Staging
Shipping packaging Container End-Cap Protection
Shipping stock Wrapped Export-Ready Bundles

We Export Worldwide

Sachiya Steel International supplies carbon steel products to major industrial markets across North America, Europe, the Middle East, Asia and Africa with export-ready documentation and logistics support.

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Frequently Asked Questions

What is the Difference Between ASTM A106 and ASTM A53 Carbon Steel Pipes?+
ASTM A106 is a seamless-only standard for high-temperature service up to 400°C. ASTM A53 covers both welded and seamless pipe for general mechanical and pressure use. A106 has stricter chemistry controls, while A53 allows ERW and furnace-welded manufacturing alongside seamless.
What Sizes are Carbon Steel Pipes Available in?+
Sizes range from 1/2" NPS to 48" NPS in schedules SCH 10, 20, 40, 80, 120, 160, and XXS. Schedule 40 is standard weight for general service. Custom sizes and cut-to-length orders are available on request.
Is Carbon Steel Pipe Strong?+
Yes. ASTM A106 Grade B delivers 60 ksi (415 MPa) minimum tensile and 35 ksi (240 MPa) minimum yield. Grade C pushes tensile to 70 ksi. API 5L X70 reaches 70 ksi minimum yield for high-pressure pipeline service.
What is the Life Expectancy of Carbon Steel Pipe?+
Expect 20 to 50+ years of service life, depending on wall thickness, operating environment, and corrosion protection. FBE-coated or cathodically protected pipelines routinely cross the 50-year mark. Without protection in a corrosive setting, replacement may come at 15 to 25 years.
What are the Common Problems with Carbon Steel Pipe?+
Corrosion is the main concern. Carbon steel doesn't contain enough chromium to form a protective oxide layer. Humid and marine conditions cause external attack, while acidic or high-chloride fluids cause internal damage. Sour service environments bring hydrogen-induced cracking risk. The right coating and adequate corrosion allowance in wall thickness are the standard countermeasures.
Can I Use ASTM A106 Grade C Instead of Grade B?+
Grade C is a valid substitute when higher strength is the priority: 70 ksi tensile versus 60 ksi for Grade B. The trade-off is weldability. Grade C allows up to 0.35% carbon compared to 0.30% in Grade B, so preheat and post-weld heat treatment are often required.
Which is Better for Pipes: Carbon Steel or Stainless Steel?+
It depends on the service environment. Carbon steel costs 50 to 70% less than stainless and handles most non-corrosive applications without issue. Where the fluid or atmosphere is corrosive, stainless steel or a coated CS pipe is the better choice. Sanitary systems and high-temperature oxidation environments also favour stainless.
What is the Price of Carbon Steel Pipe per Kg?+
Price in the Indian market starts around ₹80/kg. In other countries, it falls between $0.50 and $5.00 per kg as a general range. Grade, wall thickness, OD, and order volume all move the number. Contact us for a live quote.
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