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All the raw materials of seamless steel tubes and coupling bar stocks that we use come from the large and famous steel manufacturing mills/enterprise in China;
1Bar Coupling Stock
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According to the product specifications, in strict accordance with the inventory system for raw materials import base cutting saw;
2Cutting
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The blank rough turing on cut parts is made on plan lathe, processing to meet the requirements of outside diameter and length;
3Rough Maching
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According to the requirements of the drawings or contracts/orders, use CNC to machine standard and precise workpieces.
4Maching
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Use magnetic particle inspection machine on the processing of the workpiece to do nondestructive testing, testing whether there is a crack or scar;
5Magnrtic Inspection
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Measurement and inspection are done according to the production requirements of each process, and with a complete inspection records.
6Inspection
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Using high temperature phosphating process, improve the phosphating film adhesion and the anti-corrosion ability of the product;
7Phosphate Coating
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Use the automatic-painting line that our company own researched and developed on the workpieces surface painting, Conveniently and quickly;
8Marking&Painting
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Usually couplings are packed by pallets and pup joints by bundles and steel frames, using automatic packing machine and pallet packaging film, which are moisture-proof and anti-impacting;
9Packing
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After specialized and professional factory inspection, using the trucks, rail, air transport, sea/ship transport and so on, by the integrity and stability of the transport chain to ensure timeliness of product transportation.
10Delivery