GB Seamless Steel Pipe
GB seamless steel pipes are high-quality seamless steel tubes manufactured in strict accordance with Chinese National Standards(GB).Produced via hot rolling,cold drawing,or cold rolling processes without longitudinal or spiral welds,they fe...
GB seamless steel pipes are high-quality seamless steel tubes manufactured in strict accordance with Chinese National Standards(GB).Produced via hot rolling,cold drawing,or cold rolling processes without longitudinal or spiral welds,they feature uniform wall thickness,excellent mechanical properties,and reliable performance.These pipes are widely used across construction,machinery,energy,petrochemical,and boiler industries,forming a complete product system with dedicated standards for different applications.
Core GB Standards&Application Categories
1.Structural Seamless Steel Pipes(GB/T 8162-2018)
Purpose:For general structural and mechanical engineering applications.
Materials:Carbon steels(10#,20#,45#),low-alloy steels(Q345,Q355).
Applications:Building frameworks,machinery parts,vehicle chassis,engineering structures requiring high strength and rigidity.
2.Seamless Steel Pipes for Fluid Transportation(GB/T 8163-2018)
Purpose:For conveying water,oil,natural gas,and other non-corrosive fluids全国标准信息公共服务平台.
Key Features:Good pressure resistance,leak-proof performance,and weldability.
Applications:Urban water supply networks,oil/gas gathering pipelines,industrial fluid delivery systems.
3.Seamless Steel Pipes for Low&Medium Pressure Boilers(GB 3087-2008)
Purpose:For manufacturing superheated steam pipes,boiling water pipes in low and medium pressure boilers.
Materials:High-quality carbon structural steels(10#,20#).
Applications:Industrial boilers,locomotive boiler components.
4.Seamless Steel Pipes for High-Pressure Boilers(GB/T 5310-2017)
Purpose:For high-pressure boiler heating surfaces,operating under high temperature and pressure.
Typical Grade:20G(0.20%carbon content,excellent high-temperature creep resistance).
Applications:Power plant boilers,high-temperature heat exchangers.
5.Seamless Steel Pipes for Petrochemical&Fertilizer Equipment(GB/T 9948-2025)
Purpose:For petroleum cracking,chemical fertilizer production,and high-pressure petrochemical equipment全国标准信息公共服务平台.
Operating Conditions:Temperature:-40°C to 400°C;Pressure:10–30 MPa.
Applications:Refinery furnace tubes,heat exchangers,fertilizer plant pipelines.
6.Stainless Steel Seamless Pipes(GB/T 14976-2012)
Purpose:For corrosive fluid transportation and high-temperature environments.
Grades:304,316,321,etc..
Applications:Food processing,pharmaceutical,chemical,and marine engineering.
Key Technical Specifications
1.Dimensions(GB/T 17395-2008)
Outer Diameter(OD):6 mm–630 mm(custom sizes available).
Wall Thickness(WT):1.0 mm–40 mm.
Length:Random lengths(6–12 m),fixed lengths,and double lengths per customer requirements.
2.Manufacturing&Quality Control
Process:Hot rolling→piercing→rolling→heat treatment→finishing→inspection.
Testing:90%hydrostatic pressure test,ultrasonic testing(UT),eddy current testing,mechanical property tests(tensile,yield,elongation).
Delivery States:Hot-rolled(HR),cold-drawn(CD),normalized,quenched and tempered.
Core Advantages
Seamless Integrity:No weld defects,uniform strength,and high pressure-bearing capacity.
Standardized Compliance:Strictly follows GB standards,ensuring consistent quality and interchangeability in domestic and international projects全国标准信息公共服务平台.
Wide Material Range:Covers carbon steel,alloy steel,and stainless steel to meet diverse application needs.
Cost-Effectiveness:Balanced performance and cost,ideal for large-scale industrial applications.
Applications Summary
Construction&Machinery:Structural supports,mechanical components,vehicle parts.
Energy&Utilities:Oil/gas pipelines,power plant boiler tubes,water supply networks.
Petrochemical&Chemical:Refinery equipment,fertilizer production lines,corrosive fluid transport.
Special Industries:High-temperature heat exchangers,food-grade stainless steel pipelines.
