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;
Bar Coupling Stock
According to the product specifications, in strict accordance with the inventory system for raw materials import base cutting saw;
The blank rough turing on cut parts is made on plan lathe, processing to meet the requirements of outside diameter and length;
According to the requirements of the drawings or contracts/orders, use CNC to machine standard and precise workpieces.
Use magnetic particle inspection machine on the processing of the workpiece to do nondestructive testing, testing whether there is a crack or scar;
Measurement and inspection are done according to the production requirements of each process, and with a complete inspection records.
Using high temperature phosphating process, improve the phosphating film adhesion and the anti-corrosion ability of the product;
Use the automatic-painting line that our company own researched and developed on the workpieces surface painting, Conveniently and quickly;
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;
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.