高酸性气田冶金复合汇管焊接制造技术

Welding manufacturing technology of metallur-gical composite manifold in high acid gas field

天然气预处理厂用复合板制的汇管长度超长,且需要长途运输到国外,为保证整体制造质量及减少现场可能出现的问题,采用厂内整体制作、试压后分段切割、现场进行最后分段口焊接的制作方案。该汇管直径小,壁厚较厚,筒体变形率较大,根据其设计的材质Q345R(R-HIC)+S31603及结构特点,从筒体卷制、加工及焊接等方面介绍了小直径复合设备的制作工艺及焊接质量的保证措施,对同类型设备的制造具有一定的借鉴意义。

The length of the manifold made of composite plate in the natural gas pretreatment plant is too long,and it needs to be transported to foreign countries for a long distance.In order to ensure the overall manufacturing quality and reduce the possible problems on site,the production scheme of overall fabrication in the plant,segmented cutting after pressure test,and final segment opening welding on site are adopted.The manifold has small diameter,thick wall and large deformation rate,according to its design material Q345R(R-HIC)+S31603 and structural characteristics,the manufacturing process and welding quality assurance measures of small diameter composite equ-ipment are introduced from the aspects of cylinder rolling,processing and welding.It has certain reference significance to the manufacture of the same type of equipment.