ProfessionalQ195 Q235 Q355 galvanized steel strip customized for high-frequency welded pipe production. Featuring flat surface, stable tension and superior weldability, it is widely used for water pipes, gas pipes, greenhouse and fire protection steel pipes.
GI Steel Strip :
This pipe-making galvanized strip selects Q235 medium carbon structural steel as exclusive substrate, customized for high-frequency welded pipe continuous production lines. Q235 balances moderate strength and good weldability, solving the insufficient bearing capacity of Q195 thin strip and over-hard forming difficulty of Q355 high-strength material. The raw steel coil undergoes precise thickness control and straightening treatment before galvanizing, guaranteeing full-coil even flatness and stable tension during high-speed pipe rolling. Optimized welding-friendly hot-dip craft avoids excessive zinc volatilization during high-frequency fusion, reducing blowhole and crack defects on welding seams. Each coil passes bending, tensile and welding spot sampling inspection before delivery, with complete inner and outer zinc coating to protect finished pipes from internal rust after fluid transportation. This material is exclusively developed for round and square galvanized pipe manufacturers, with fixed width customization matching standard pipe diameters to improve production efficiency.GI Steel Strip ,Hot Dipped Galvanized Steel Strip,GI Steel Strip,GI Strip Coil / Slit Coil
Core Performance Advantages :
Q195 Q235 Q355 substrate owns balanced tensile and yield strength, making finished steel pipes resist slight pressure deformation for water, gas and ventilation delivery. The whole coil has consistent mechanical uniformity, so all pipe sections keep identical wall strength after roll forming and welding. Zinc layer possesses strong high-temperature fusion compatibility with welding arc, ensuring tight, leak-free weld joints without extra sealing treatment. 180-degree cold bending test shows no zinc peeling or substrate fracture, adapting to pipe end flanging and threading secondary processing. The zinc coating weight ranges 100–220g/㎡, providing long-term anti-corrosion for buried and outdoor pipelines, lowering pipeline replacement cycle and after-sales maintenance expenditure for engineering contractors.GI Steel Strip ,Hot Dipped Galvanized Steel Strip,GI Steel Strip,GI Strip Coil / Slit Coil.
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Parameter Item |
Technical Specification
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Base Material Grade |
Q235+Z
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Thickness Range |
1.2mm–5.0mm
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Width Range |
150mm–1400mm
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Zinc Coating Mass |
100g/㎡–220g/㎡
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High-Frequency Welding Pass Rate |
≥99%
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180° Bending Test
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No crack & zinc delamination |
Application Scope :
Core raw material for producing greenhouse frame pipes, building water supply & drainage galvanized pipes, heating ventilation ducts, civil gas conveying pipes and fire protection special steel tubes. Also used for municipal highway guardrail pipes, low-pressure industrial fluid conveying pipelines and irrigation engineering support pipes. Major clients are domestic pipe factories and overseas pipeline engineering suppliers, with stable demand in agricultural irrigation and municipal infrastructure markets.
We provide global clients with stable supplies, rigorous quality control, and customized solutions. For inquiries or quotations, please contact us:
Sales Specialist : Ms. Lina
Email: lina@authsteel.com
Phone: +86-137 5206 8850
WhatsApp: +86-137 5206 8850
We will respond within two working hours with professional advice and a quotation.
