we are established in 1994. We can produce sawh ssaw dsaw hfw spiral pipes comply with standards of api 5l.astm a252, astm a139, awwa c200, din2440, bs524, is2062, outside diameter: 219 mm to 3220mm, pipe thickness: 5mm to 26mm (0.236-0.708inch),...
We are offering spiral drill pipes for coal mining. Specifications spiral coal drill rods 1> iso9001 certificate 2>it has good stability 3>longer working life 4>high efficiency spiral coal drill rods specialisted in producing varies kinds of...
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