目前,可用纤维加张力的LONGO—CIRC方法形成张紧型纤维增强塑料(TFRP)复合材料,来制成能够满足或超过已有复合材料管道工程标准的高压增强热固性树脂管(RTRP).复合材料TFRP管含有一个longo层铺层结构的扩口形端部,这为制造出在抗张、抗弯、抗剪和抗压缩荷载方面与管子本身一样强的高强度机械式管接头提供了条件.目前,这类管子已被石油工业所接受,其应用正日益增加. Tensile fiber-reinforced plastic (TFRP) composites can now be made using a fiber-plus-stretch LONGO-CIRC process to make high-pressure-resistant thermosetting resin tubes (RTRP) that meet or exceed existing composite pipeline engineering standards. The TFRP tube contains a flared end of a longo layering which provides the basis for producing high strength mechanical fittings that are as strong as the tube itself in terms of tensile, flexural, shear and compressive loads. Currently Such pipes have been accepted by the oil industry and their use is increasing.