混凝土管在我国给水管网中虽已广泛地应用,但三通、弯头等连接管件仍都是用铸铁和钢板制作的。仅去年一年,我公司就加工了300毫米至1200毫米的管件151件。为了提高工效和降低造价,除法兰连接的管件外,其余都作了改进。改进后,工效提高了三倍,每吨管件的造价降低了150～200元。现以800毫米三通为例,改进前是根据标准设 Although the concrete pipe has been widely used in the water supply pipe network in China, the connecting pipes such as the three-way pipe and the elbow are still made of cast iron and steel plate. Last year alone, our company processed 151 pieces of pipe from 300mm to 1200mm. In order to improve the work efficiency and reduce the cost, all but the flanged pipe fittings have been improved. After the improvement, the ergonomics has increased threefold, and the cost per ton of pipe fittings has been reduced by 150 to 200 yuan. Now take 800mm three links as an example. Before the improvement, it is based on standard settings.