Limestone Quarry Plant

One of the Top 500 enterprises in China foreign trade

QCCO was approved as a member of “China Association for Contracting Projects Abroad “and granted a membership certificate on Sep 28,2005; “Credibility Rating AAA certificate in Foreign Trade” was granted to QCCO by China Shippers’ Association


Seamless steel pipe EN10305-4 Grade: E215,E235,E275,E355

Seamless precision steel pipe EN10305-4
Size: 6-350mm
Steel grade: E235,E355 etc

Production method: 

Cold drawing on the seamless steel tubes, to reach high accuracy on the OD and WT tolerance,
with certain heat treatment to achieve better mechanical properties for bending and pressure purposes

EN10305-4 Cold drawn tubes for hydraulic and pneumatic power systems

Steel Grade: 
E215,E235,E275,E355, other materials upon agreement with customers.
4.Size range: 
O.D.:5-80mm     W.T.:1-15mm      L:max12000mm

In Hexagonal Bundles, wth anti-rust oil protection, with seaworthy packing 

Deliver condition:
+N After the final cold drawing operation the tubes are normalized in a controlled atmosphere
Seamless steel pipe EN10305  

Surface smoothness could be reached by EN10305-4 request Ra≤2μm, and better than standard.
Surface treatment could be:
1. Protection by phosphatization
2. Protection by galvanization, and chromatization type blue-white
3. Protection by galvanization and chromatization type yellow
4. Protection by galvanization and chromatization type olive green

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