Ostar has 20 years for professional manufacture of flange, fittings and pipe in China. The flange factory was founded in 1988. The fittings and pipe factories were founded in 2002.

Ostar has outstanding production and export businesses supply for Oil & Gas , Petrochemical, Electrical & Power, Marine & Shipbuilding, Construction, and ocean engineering industries in the region. Best quality products has  been sold far around the world and are very popular with vast number of customers in the international market such as Europe, America, Germany, Africa and Southeast Asia, especially in the Middle East market such as U.A.E, Iran, Oman,  Iraq,  Saudi-Arabia,Qatar.

Our factories can provide various size of carbon steel flanges, elbow, tee, bends, cap, carbon steel pipe etc.

The details of our products are as followings:

  1.FLANGES

     1)  TYPE: Blind,Slip-on,Weld Neck,Threaded,Lap Joint,Socket Welding,Plate flange etc.

     2)  STANDARD: ANSI,BS4504,AWWA,API,JIS,DIN.

     3)  SIZE: 1/2" -- 160".

     4)  PRESSURE CLASS: 150LBS -- 2,500LBS(PN2.5--PN40).

     5)  MATERIAL: Carbon steel,Stainless steel.

     6)  Special Design Available.

  2.FITTINGS

All sizes of seamless elbow, tee, con-reducer, Ecce-reducer, bend, cap, Reducing tee.

3. PIPE

1) TYPE: SEAMLESS , ERW, SPIRAL PIPE.

2) STANDARD: ASME B36.10 ,  API 5L,  API 5CT.

3) MATERIAL: ASTM A53/A106 GR.B, X42, X52 etc.

4) SIZE: OD: 21.3mm ??2020mm  WT: 1.2 mm ??60mm.



The technology of cold shaping , Hot pressing ,Forging, Welding. Thermal treatment and the physical and chemical analysis, Phase analysis and flaw detector, All reaches the international standard.


Ostar has the powerful technical support system and complete quality control and quality guarantee system. Ostar took the lead to pass the German TUV - ISO9001: 2000 quality system certification and international ISO9002 quality system certification.