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Black Steel Pipe

Black Steel Pipe supplier

Black Steel Pipe is carbon steel pipe supplied with a black, ungalvanized surface. It is commonly produced by ERW welding or seamless pipe production, and can be supplied in black, oiled, painted, varnished, or anti-rust treated finish according to project requirements. SKSteel supplies Black Steel Pipe with full sizes available, multiple steel grades, stable quality, smooth surface finish, mill test certificates, and fast delivery for construction, structure, fire protection, gas, oil, water, and general engineering projects.
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Black Steel Pipe supplier

Black ERW Steel Pipe
Free quotation
Black Seamless Steel Pipe
Free quotation
Black Welded Steel Pipe
Free quotation
Black Structure Steel Pipe
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Black Round Steel Pipe
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Item Description
Product Black Steel Pipe / Black Carbon Steel Pipe
Standard API 5L, ASTM A53, ASTM A500, ASTM A795, EN10219, EN10255, BS1387, JIS G3444, GB/T
Steel Grade Q195, Q235B, Q355B, S235JR, S355JR, ASTM A53 Gr.A/Gr.B, API 5L Gr.B or Customized
Production Method ERW Welded, Seamless, LSAW, SSAW or Customized
Outside Diameter 21.3mm-3048mm or Customized
Wall Thickness 1.0mm-100mm or Customized
Length 5.8m, 6m, 9m, 12m or Customized
Surface Black, Oiled, Painted, Varnished, Anti-rust Coated or Customized
Certificate MTC EN10204 3.1 Available
For other specifications and customization requirements, please contact our professional sales team.

Chemical composition depends on the selected base pipe steel grade and project standard. The following table is a common reference for carbon steel black pipe materials.

Element Content (%)
C According to steel grade requirement
Si According to steel grade requirement
Mn According to steel grade requirement
P Controlled by applicable standard
S Controlled by applicable standard
Property Value
Yield Strength According to grade and standard
Tensile Strength According to grade and standard
Elongation According to grade and standard
Pressure Performance Inspected by size, straightness, corner radius, surface and project requirements

Applications

Thanks to its flat surfaces and superior structural efficiency, Square Steel Pipe is widely utilized across these core sectors:
Construction & Infrastructure
Machinery & Equipment
Automotive & Transportation
Warehousing & Logistics

Challenges & Needs

For high-demand structural assembly environments, we understand that you must avoid these risks when sourcing Square Steel Pipe:

Large Corner Radii

Rounded corners making assembly gaps wider and compromising the finished aesthetic.

Internal Residual Stress

High internal stress causing twisting during laser cutting or welding.

Poor Coating Adhesion

Coating flaking off, leading to rapid rust in outdoor applications.

Our Supply Solutions

As your source supplier, we utilize precision rolling, ensuring Square Steel Pipe has sharp corners and strict dimensional tolerances for high-standard pre-assembly.
We integrate laser cutting, bending, and anti-corrosion services, allowing the square pipe to be installed efficiently upon arrival, eliminating on-site pre-processing and significantly cutting your installation time and total costs.
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WHY CHOOSE SKSTEEL FOR Square Steel Tube?

  • Large Ready Stock
  • Full Size Range Available
  • Multiple Steel Grades Available
  • ERW, Seamless, LSAW, and SSAW Options
  • Competitive Export Pricing
  • Cutting and Processing Services
  • Mill Test Certificates Available
  • Fast Global Delivery
  • Professional Export Support
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Value-Added Services

We provide more than high-quality Square Steel Pipe; we offer full-chain services to remove manufacturing hurdles:

Precision End-Processing

3D laser cutting for complex mitered joints and slotting.

Surface Protection

Hot-dip galvanizing, powder coating, or priming for significantly extended lifespan.

Bending & Forming

Mandrel-assisted bending to create arches or rings without wall buckling.

Transparent Delivery

Detailed material lists and quality reports to ensure full control.

Collaboration with SK STEEL

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FAQ for Steel Supply Services

What is Black Steel Pipe?

Black Steel Pipe is carbon steel pipe supplied without zinc galvanizing. It usually has a black oxide, oiled, painted, or varnished surface and is widely used in construction, structure, fire protection, gas, oil, and general engineering applications.

Black Steel Pipe is not coated with zinc, while Galvanized Steel Pipe has a zinc coating for improved corrosion resistance. Black Steel Pipe is commonly used where galvanizing is not required or where painting, coating, or indoor service is suitable.

SKSteel can supply Black Steel Pipe according to API 5L, ASTM A53, ASTM A500, ASTM A795, EN10219, EN10255, BS1387, JIS G3444, GB/T and other project standards.

Yes. SKSteel can supply black, oiled, painted, varnished, anti-rust coated, epoxy coated, 3PE coated, and other surface treatments according to project requirements.

Yes. Cutting, threading, grooving, beveling, drilling, coating, marking, packing, and custom length services are available.

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