目前市场上油管的需求量非常大,尤其是外加厚油管的市场需求量更大。但是现在国内市场中外加厚油管主要都是靠镦粗来制造的,这种制造外加厚油管工艺所需的设备投资大、造价高,而且还非常笨重。我们将摩擦对焊工艺应用到了外加厚油管生产中来。投资少,成本低,并且现场使用效果很 Currently on the market demand for tubing is very large, especially outside the market demand for thicker tubing larger. However, nowadays the thickened tubing in the domestic market is mostly made by upsetting. The equipment for manufacturing the thickened tubing requires large equipment investment, high cost, and very heavy weight. We apply the friction butt welding process to externally thick tubing. Low investment, low cost, and very effective on-site use