• Seamless steel pipe
Seamless steel pipe
+

Seamless steel pipe

Steel products with hollow cross‑sections, whose length significantly exceeds their diameter or perimeter. Based on cross‑sectional shape, they are classified into circular, square, rectangular, and special‑shaped steel pipes; based on material, into carbon structural steel pipes, low‑alloy structural steel pipes, alloy steel pipes, and composite steel pipes; and based on application, into pipes for fluid conveyance, engineering structures, thermal equipment, the petrochemical industry, mechanical manufacturing, geological drilling, and high‑pressure equipment, among others. According to manufacturing process, they are divided into seamless steel pipes and welded steel pipes; seamless pipes further subdivide into hot‑rolled and cold‑rolled (drawn) types, while welded pipes are categorized as straight‑seam welded pipes and spiral‑seam welded pipes. Steel pipes are not only used for conveying fluids and powdered solids, exchanging heat, and fabricating machine parts and pressure vessels, but also constitute an economical form of steel. Using steel pipes to construct structural trusses, columns, and mechanical supports can reduce weight, save 20–40% of metal, and enable factory‑based, mechanized construction. Moreover, employing steel pipes in highway bridge construction not only conserves steel and simplifies construction but also markedly reduces the area requiring protective coatings, thereby lowering both capital and maintenance costs.

Seamless steel pipe

Steel products with hollow cross‑sections, whose length significantly exceeds their diameter or perimeter. Based on cross‑sectional shape, they are classified into circular, square, rectangular, and special‑shaped steel pipes; based on material, into carbon structural steel pipes, low‑alloy structural steel pipes, alloy steel pipes, and composite steel pipes; and based on application, into pipes for fluid conveyance, engineering structures, thermal equipment, the petrochemical industry, mechanical manufacturing, geological drilling, and high‑pressure equipment, among others. According to manufacturing process, they are divided into seamless steel pipes and welded steel pipes; seamless pipes further subdivide into hot‑rolled and cold‑rolled (drawn) types, while welded pipes are categorized as straight‑seam welded pipes and spiral‑seam welded pipes. Steel pipes are not only used for conveying fluids and powdered solids, exchanging heat, and fabricating machine parts and pressure vessels, but also constitute an economical form of steel. Using steel pipes to construct structural trusses, columns, and mechanical supports can reduce weight, save 20–40% of metal, and enable factory‑based, mechanized construction. Moreover, employing steel pipes in highway bridge construction not only conserves steel and simplifies construction but also markedly reduces the area requiring protective coatings, thereby lowering both capital and maintenance costs.

| Detailed Introduction

  Steel products with hollow cross‑sections, whose length significantly exceeds their diameter or perimeter. Based on cross‑sectional shape, they are classified into round, square, rectangular, and special‑shaped steel pipes; based on material, into carbon structural steel pipes, low‑alloy structural steel pipes, alloy steel pipes, and composite steel pipes; and based on application, into pipes for fluid conveyance, engineering structures, thermal equipment, the petrochemical industry, mechanical manufacturing, geological drilling, high‑pressure equipment, and more. According to manufacturing process, they are divided into seamless steel pipes and welded steel pipes; seamless pipes further subdivide into hot‑rolled and cold‑rolled (drawn) types, while welded pipes are categorized as straight‑seam welded pipes and spiral‑seam welded pipes. Steel pipes are not only used for conveying fluids and powdered solids, exchanging heat, and fabricating machine parts and pressure vessels, but also constitute an economical form of steel. Using steel pipes to construct structural trusses, columns, and mechanical supports can reduce weight, save 20–40% of metal, and enable factory‑based, mechanized construction. Moreover, employing steel pipes in highway bridge construction not only conserves steel and simplifies construction but also markedly decreases the area requiring protective coatings, thereby reducing both capital investment and maintenance costs.

  Classification by Connection Type: Steel pipes can be categorized according to their end‑connection methods into plain pipes (with unthreaded ends) and threaded pipes (with threaded ends). Threaded pipes, in turn, are divided into standard threaded pipes and thickened‑end threaded pipes. Thickened‑end threaded pipes further subdivide into externally thickened (with external threads), internally thickened (with internal threads), and both internally and externally thickened (with both internal and external threads) types. Depending on the thread profile, threaded pipes may also be classified as having standard cylindrical or conical threads, or special‑profile threads. Additionally, upon customer request, threaded pipes are typically delivered complete with pipe fittings.

  Steel pipes can be classified according to their surface coating characteristics into black pipes (uncoated) and coated pipes. Coated pipes include galvanized pipes, aluminized pipes, chromized pipes, aluminized‑steel pipes, and other steel pipes with alloy coatings. Coated pipes are further categorized as externally coated pipes, internally coated pipes, and both internally and externally coated pipes. Common coating materials include plastics, epoxy resins, coal‑tar epoxy resins, and various glass‑type anti‑corrosion coatings. Galvanized pipes are subdivided into KBG pipes, JDG pipes, threaded pipes, and others.

In 2016, steel prices are expected to remain highly volatile. Buyers are advised to choose the optimal timing for their purchases—after all, securing the right price at the right time is key. Canghai Steel Company manufactures a wide range of seamless steel pipes and other products, offering guaranteed quality at fair prices. We welcome buyers to visit us for product selection and to discuss potential collaborations.

| Message Inquiry

Note: Please provide your email address, and our specialists will contact you promptly!

More products


High-speed rail support made of straight-seam steel pipe

High - rise building pipe

Large diameter coil

Straight seam pipe

Straight seam steel pipe

Spiral steel pipe manufacturer