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Mild steel hollow section
SQUARE&RECTANGULAR STEEL TUBE
ERW WELDED PIPE
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HOME
PRODUCT
Mild steel hollow section
SQUARE&RECTANGULAR STEEL TUBE
ERW WELDED PIPE
GALVANIZED PIPE
ZINC ALUMINUM MAGNESIUM STEEL PIPE
SHIP BUILDING STEEL PIPE
SPIRAL TUBE
LSAW PIPE
SEAMLESS PIPE
SPECIAL SHAPED STEEL PIPE
PPGi COIL
Gi COIL
STAINLESS STEEL TUBE/COIL
LINE PIPE&OCTG
OTHER STEEL PRODUCTS
NEWS AND FAQ
INDUSTRY NEWS
COMPANY NEWS
STEEL KNOWLEDGE
FAQ
VIDEO
LIVESHOW
QUALITY CONTROL
RAW MATERIAL GUARANTEE
PROCESS CONTROL
PRODUCT TESTING
FAST SERVICE
Packaging Quantity
ENTER YUANTAI
GROUP INTRODUCTION
OUR FACTORY
ORGANIZATIONAL STRUCTURE
QUALIFICATION HONOR
DEVELOPMENT HISTORY
PROGRAMS FOR PUBLIC GOOD
CORPORATE CULTURE
BRAND STORY
PROJECT
VR FACTORY TOUR
CONTACT US
CONVERSION TABLES
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Dn、De、D、d、 Φ How to distinguish?
Dn、De、D、d、 Φ How to distinguish?
Pipe diameter De, DN, d ф Meaning