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卷管式铺管法要求管线管具有优良的力学性能、焊接性和耐腐蚀性能,特别是抗疲劳断裂性能。天津钢管集团股份有限公司生产了1批PSL2 X65管线管,按照深海卷管的要求对其进行相关评价试验。结果表明:其拉伸、冲击、硬度和抗腐蚀能力符合PSL2 X65深海卷管规范要求;韧脆转变温度在-80℃以下,低温性能优良;5%应变后的应变时效敏感性系数小于10%,应变时效敏感性系数较小;成品管母材的CTOD试验结果表明成品管韧性良好;压扁处钢管内外表面没有裂纹和开裂。
Pipe-coil pipe laying method requires pipeline pipe has excellent mechanical properties, weldability and corrosion resistance, especially fatigue fracture resistance. Tianjin Pipe Group Co., Ltd. has produced a batch of PSL2 X65 pipeline, in accordance with the requirements of deep-sea coil its evaluation test. The results show that the tensile, impact, hardness and corrosion resistance comply with the requirements of PSL2 X65 Deep Sealed Coil Code. The ductile-brittle transition temperature is below -80 ℃ and the low-temperature performance is excellent. The strain-aging sensitivity coefficient after 5% strain is less than 10% , The strain aging sensitivity coefficient is small; finished tube parent material CTOD test results show that the toughness of the finished tube is good; crush at the inner and outer surface of the pipe without cracking and cracking.