API 5ct Oil Tubing and Casing Coupling

1). standard: gb5310,astm a106, din…
2). grade: 10#,20#,45#, a53(a,b), a106(b,c) st37,st44,st52…
3). o.d.:20mm-750mm
4). w.t.: 2mm-30mm
5). length: 5.8m-12m,or according to the clients’ request
6). usage: widely used in petroleum, natural gas, chemical power, fire and other industries,or as the clients' requirement
7). end: bevelled end or plain end
8). marking:size , standard, and heat number ,or marking as customers' required
9). painting: painting black coating on the pipes or as per the clients' request
10).package: packing in bundles, caps at both ends ,or as per the clients' request.