N :Not with thick thread coupling; U: Outer thickening take threads coupling ;I integral joint

a. threaded and coupling nominal weight (columns 2-4) shown for reference only.

b. Martensitic chromium steel (the L80 9CR and 13CR) different from carbon steels. Therefore, the table gives the weight of the martensitic chromium steel is not exact values. Can be a weight correction coefficient of 0.989

c upset tubing is available with standard coupling or special-bevel couplings. External upset tubing is available with a standard collar, special-bevel couplings or special clearance coupling

d.c90 t95 and Q125 steel grade tubing should be on the table or the order listed in the specifications weight and wall thickness supplier