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E-mail:Yuyin.Chen@Sdyzg.Com

Add:Block B, Gaoqiao Industrial Park, Dongcheng Road, Houcheng Street, Zhangjiagang City, Suzhou, Jiangsu Province, China.

European Standard：

EN 10305-1 Technical conditions for the delivery of precision steel tubes and pipes Part I Seamless steel tubes and pipes, cold drawn
EN 10305-4 Technical conditions for delivery of precision steel tubes Part 4 Cold-drawn seamless steel tubes for hydraulic and pneumatic systems
DIN 2391 Seamless cold-rolled or cold-drawn precision tubes and pipes
DIN 1630
BS 6323 Seamless and welded steel tubes for automobile, mechanical and general engineering purposes

Russian Standard：

GOST 8733 Technical Conditions of Delivery for Cold Rolled or Cold Drawn and Hot Rolled Seamless Steel Tubes and Pipes
GOST 8734 Technical Conditions of Delivery for Seamless Tubes and Pipes, Cold Rolled or Cold Drawn

U.S. Standard：

ASTM A519 Seamless carbon and alloy steel mechanical pipe
ASTM A179
SAE J524 Seamless Low-Carbon Steel Tubing Annealed for Bending and Flaring

Japanese Standard：

JIS G3445 Technical conditions of delivery for carbon steel pipes for mechanical structures

Chinese national production standards for major precision steel tubes：

GB/T8163
Seamless steel tubes for liquid transporting
GB/T8713
Precision inside diameter steel tube for hydraulic and pneumatic cylinder
GB/T3639
Cold drawn and cold rolled seamless precision steel tube
ISO8535
High-pressure seamless steel tubes for compression-ignition engine
GB/T3093
Seamless steel pipe for high pressure diesel engine

Steel grades for standard precision tubes

EN 10305-1 :E235、E255、E355、C45E
ASTM A519/SAE J524: 1010、1020、1045
JIS G3445 :STKM11A、STKM13A
DIN 2391: St35、St45、St52
DIN 1630:St 37.4, St 44.4, St 52.4

Delivery status

NBK(+N)
GBK(+A)
BK(+C)
BKW(+LC)
BKS(+SR)

Comparison Table of Tolerances of Commonly Used Dimensions