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在制订弯管技术条件时必须充分考虑弯管力学性能的要求及弯管制作方法与工艺参数对力学性能的影响，对弯管原材料屈服极限值是否应考虑包辛格效应而加大的问题应持慎重态度。为了保证弯管与管道钢管等强度，弯管与其原材料应具有标准规定的相同的力学性能；在条件许可时应优先采用热推工艺方法，制造弯管的主要工艺参数应经试制后确定其最佳值，加热温度不应过高，否则可能造成过烧，对四川输气管道用弯管，是否采用热处理，应根据多种因素综合考虑；用于输送没有净化的天然气的管道钢管应作抗ＳＳＣ和ＨＩＣ性能试验，铜污染裂纹（ＣＣＣ）的污染源有待查证，但过烧和马氏体导致的裂纹是完全能避免的，为提高管线组焊质量和弯管质量，对弯管制作和管线施工方法及管理、标准、装备及制作提出了建议。
In the development of elbow technology conditions must take full account of the mechanical properties of the elbow pipe bending and the production methods and process parameters on the mechanical properties of the elbow bend the raw material yield limit should be considered if the problem of the Bauschinger effect should be increased Hold a cautious attitude. In order to ensure the strength of elbow and pipe steel pipe, elbow pipe and its raw materials should have the same mechanical properties as specified in the standard. When the conditions permit, the hot-pushing process should be prioritized. The main process parameters of elbow pipe should be determined after trial Good value, the heating temperature should not be too high, otherwise it may cause over-burning, pipe for Sichuan gas pipe, whether the use of heat treatment, should be based on a variety of factors to consider; for non-purified natural gas pipeline steel pipe should be anti- SSC and HIC performance tests, sources of copper contamination cracks (CCC) to be verified, but over-burning and martensite-induced cracks can be completely avoided, in order to improve the quality of pipe welding and pipe quality, the production of pipe and pipe Construction methods and management, standards, equipment and production made recommendations.