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


round steel pipe


round steel pipe enjoyed a high reputation throughout the world.It is widely exported to many countries.

round steel pipe

Standard : GB 150   GB 151 GB 699   GB/T14976  GB/T8163   GB 13296

Main steel Grade:10,20,20G, 1Cr18Ni9Ti, 0Cr18Ni9,09CrMoAl, 07Cr2AlMo etc.

We can supply other materials below:

Casing Pipe/Oil pipe Seamless or welded According to API-5CT standard



Seamless line pipe/API-5L

PSL 1.A25/A/B/X42/X46/X52/X56/X65/X70/X80

PSL 2:B/X42/X46/X52/X56/X60/X65/X70/X80

Carbon seamless pipe


1.       A20-C St52.4/St52  STS49

2.       ASTM A106 GR.A/B/C;  ASTM A53 GR.A/B/API 5L-GrB

3.       DIN1629

4.       JIS G3454

5.       ASTM A192/A210/A179

6.       DIN17175

7.       JIS G345

8.       JIS G3456

9.       BS1387

10.   GB/T6728,ASTM A500,EN10217,Q195-235

11.   ST35.8/ST45.8

12.   DIN2448

13.   DIN1629

Alloy pipe

Alloy pipe

Seamless or welded



335(Gr P1,P2,P5,P9,P11,P12,P22)  333Gr.1,3,6209T1,T1A,T1b


2448(Gr.ST37),1630(ST37.4,44.4),BS3059(Gr CFS 360,440,243,60,622-440,622-490)


A335-P1          15Mo3  STPA12

A335-P2/A213-T2           STBA20

A335-P2/A213T12  13CrMo44  STBA22

A335-P22.A213T22  10CrMo910  STBA24

A335-P5/213-T5     12CrMo195   StA25



Stainless steel pipe

Seamless or welded

304(3040Cr18Ni9) 304(00Cr19Ni10) 321(1Cr18Ni9Ti) 321(00Cr18Ni12Mo2Ti)   310S(0Cr25Ni20)  310S(1Cr25Ni20Si2)904L



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