Forging treatment will give the pipe fittings with excellent mechanical properties. This series of fittings incorporate pipe union, socket weld fittings, socket weld couplings, socket weld cross, socket elbow, and saddle pipe support, etc. AHAD TUBELINE is a senior pipeline and pipe fitting manufacturer founded in 2006. Through the past 10 years, AHAD pipeline products have found popularity in industries of electricity, oil and gas, petrochemical, chemical, shipbuilding, heating, and papermaking, etc.