... , perfect testing instruments2 Its HRC is 60-62 degrees.The pipe service life can increase 3-5 times.3.OEM available ... spare parts in China,specilized in producing concrete pump pipe , high wear resistant pipe, rubber hose, elbow, flange, cleaning balls, pistons, eye ... All Concrete pump trucks SUJ2 DN125 Wear-resistant Concret pump pipe flange DN125 Concrete Pump Collar Ring (Double Layer, 157mm)