Outer steel with plastic thread protectors for protecting oil casing and all kinds of pipe ends of the thread. Prior to domestic and foreign products have steel structure, plastic structure, all steel several. All steel products have the advantage of strong impact, but high cost, difficult process, easy to make pipe thread damage. Steel structure products, plastic construction product flexibility, light weight, easy processing of these mass-produced products after processing is completed, due to go through warehousing plastic thread protectors, packaging, transportation 41/2 thread protectors to reach users hand thread protectors, half-way there would be a collision, dust erosion, has already started the finished outer rib [generally tube-type], inner rib susceptible to damage, especially in the rib by dust pollution [hydraulic pump]. So 27/8 thread protectors, people use plastic to make a sealed tube head to trap the outer rib, do one kind of spin live inside plastic rib to protect the rib less susceptible to report. Also the interior from dust erosion. The plastic parts we call it the rib protector, of course, with a metallic material can be done, but because of the high cost, only on sophisticated products to protect steel thread protectors |. Liaoyuan thread protectors | Tong machinery being made Ning County is Tong Machinery Plastic Limited. Ning County is Tong Machinery Plastic Co., Ltd. (www.dzztjx.com) strong, credible, in Dezhou's plastic industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead positive Tong machinery and you hand in hand into the brilliant, for a better future!