联合崽子

Our heat treatment processes ensure a hardness range of 285-341 Brinell. Charpy "V" notch minimum impact strength of 40ft-lb at 70 degree Fahrenheit are guaranteed one inch below the surface. Our integral drill pipe pups are heat treated to 120,000 psi mininum yield. Integral ppups have the same tensile and torsional rating of S-135 drill pipe with the same pin ID. All connections are phosphate-coated to improve resistance to galling. Standard lengths are 5ft, 10ft, 15ft, and 20ft. Additional sizes are available upon request. Same-size pup joints 10 ft and longer can be produced as welded assemblies.