United Pipe & Steel is a master distributor of carbon steel pipe, serving independent wholesale distributors from 12 distribution centers across the U.S.
As a steel pipe supplier with industry-leading fill rates, we deliver high-quality product while maintaining a strong commitment to inventory.
We stock carbon steel pipe for wholesale distributors nationwide, including domestic welded, globally sourced welded and seamless products in black and galvanized. Our broad inventory allows you to meet your desired price point, and our extensive product range lets you break bundles and combine steel with plastic, copper and other products to fit your unique needs. We carry the most sizes and types of Domestic CW product, stocked with anti-microbial coating for UL/FM approved products.
Planning an order? Use our pipe weight calculator to estimate weight per foot and total weight, or check outside diameter and wall thickness in our pipe dimensions chart.
Our high-quality products include:
Domestic steel products are available in Black and Galvanized, Continuous Weld and Electric Resistance Weld, Plain End, Threaded, and Roll Grooved offerings. Domestic steel comes in Schedule 10, 40 and 80 in 1/8” – 18” diameters.
GLOBALLY SOURCED WELDED STEEL PIPE
Imported steel products are offered in Black and Galvanized, Gr. B Electric Resistance Weld, Plain End, Threaded & Coupled, Threaded Both Ends, and Roll Grooved. Schedule 10, 40, and 80 steel products come in 1/8” – 24” diameters, with some products meeting the Buy American Act and UL/FM Specifications.
GLOBALLY SOURCED SEAMLESS STEEL PIPE
Globally sourced seamless products are offered in Bare, Black, and Galvanized, with Beveled, Grooved, Square Cut, and Threaded & Coupled ends. Schedule 40 and 80 come in 1/4” – 24” diameters.
Seamless vs. Welded Carbon Steel Pipe
Welded product is formed from flat strip and joined along a seam, either by continuous weld (CW, ASTM A53 Type F) or electric resistance weld (ERW, ASTM A53 Type E). Seamless is made from a solid billet with no weld seam, so it is typically specified for high-pressure, high-temperature and process applications. For plumbing, fire protection, mechanical and general structural work, welded is the more common and economical choice.
Black, Galvanized and Grooved Finishes
Black is standard for gas, fire sprinkler, steam and general mechanical lines. Galvanized has a zinc coating for corrosion resistance and is common in outdoor and exposed applications. Depending on the product line, ends are available plain, threaded and coupled, threaded both ends, roll grooved and beveled.
ASTM A53, A106 and A135 Carbon Steel Pipe Standards
Most of what we stock is made to ASTM A53, which covers black and galvanized welded and seamless product in Grades A and B. ASTM A106 Grade B covers seamless carbon product for high-temperature service. ASTM A135 covers ERW, including the Schedule 10 lightwall we stock for fire sprinkler systems. For details on CW product, see our ASTM A53 Grade B Type F FAQ. See our ASTM A53 pipe guide for types, grades, and how A53 compares with A106.
More Pipe Info:
Sharpen Your Competitive Edge With United Pipe & Steel
- Become more competitive and manage your risk on volatile commodity products while turning inventory more quickly.
- Break bundles and take advantage of low weight minimums while mixing and matching products, including copper tube, PVC pipes, threaded rod, strut and all other products we carry.
- Buy what you need, when you need it.
- Take advantage of routine ‘milk run’ delivery routes for service once or twice per week.
Talk With Us! Call: 800-777-7473
We Deliver On Our Promise
- Reliable, On-time delivery dates.
- Knowledgeable service staff pick orders accurately at the warehouse.
- Reliable delivery made with our own fleet of flatbed trucks.
- Unique in the Industry - We’ll help you unload at delivery locations including jobsites!
- As you need, we allow will-calls at all warehouse locations 5 days per week!
- MTR’s available on all steel pipe.