High-pressure seamless steel pipes for fertilizer equipment are manufactured according to GB 6479 and designed for transporting high-temperature, high-pressure media in fertilizer and chemical plants. They operate reliably under –40~400°C and 10–30 MPa, ensuring safe long-term performance.
Material Categories for GB 6479 High-Pressure Pipes
1. High-Quality Carbon Structural Steel for Fertilizer Pipe Systems
Designed with controlled S/P levels for stable chemical and mechanical properties.
Includes low-carbon and medium-carbon grades such as 10, 20, 35, 45, used in structural applications and fluid pipelines.
2. Alloy Structural Steel for High-Pressure Chemical Pipelines
Alloyed for enhanced strength, toughness, and hardenability.
Widely applied in high-pressure pipelines, pressure vessels, and critical chemical equipment.
Manufacturing Process of High-Pressure Seamless Steel Pipes
The production follows a full seamless process involving:
Raw material preparation → heating → piercing → rolling → sizing → cooling → straightening → end trimming → chemical & mechanical tests → NDT (UT/X-ray) → marking & packaging.
High precision ensures excellent internal soundness and dimensional accuracy.
Product Features & Specifications of GB 6479 Fertilizer Seamless Pipes
Seamless structure delivers superior bending and torsional strength.
Common dimensions include 406×10 mm, 356×12 mm, with custom sizes available.
Optional anti-corrosion treatments: galvanizing, plastic coating, alloy lining.
Fully complies with GB 6479 pressure-bearing and safety requirements.
Application Areas of High-Pressure Fertilizer Seamless Pipes
Widely used in:
Fertilizer plants (ammonia, urea, methanol)
Petrochemical & petroleum cracking systems
High-pressure hydraulic supports
Gas, refinery, power plant pipelines
Metallurgy and high-temperature/high-pressure media transport
Environmental protection equipment (waste gas/wastewater treatment)
Standards & Performance Requirements
GB 6479 defines:
Technical requirements
Testing & inspection methods
Packaging & marking
Acceptance rules
Ensuring the pipes provide safe, stable operation under extreme high-pressure and corrosive environments.
Weight Calculation Formulas for High-Pressure Seamless Steel Pipes
Carbon Steel Pipe:
(OD–WT)×WT×0.02466=kg/m
Alloy Steel Pipe:
(OD–WT)×WT×0.02486=kg/m
United Steel Industry As the most important steel pipe manufacturer and exporter in China, in the past 20 years, we have completed more than 100 projects, with partners in more than 100 countries, and established relationships with oil and gas and EPC companies in many countries business relationship.
For more information about the product price, catalog and rolling mill inspection certificate,
please consult:Email:Sales@usisteels.com
