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...
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),...
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