jacket tube

This post was last edited by ylb913 on 2016-12-3 at 19:01. The requirements for its functionality may vary. Principle 1: The area where the jacket extends must not experience condensation (or crystallization). This is likely related to the lowest temperature in the region; in any case, it is based on experience. Principle 2: Minimize the number of welds on the inner tube inside the jacket. This was actually a requirement in the past; however, with improvements in construction quality and management standards, this requirement is less emphasized these days. The flaw detection of the inner tube used to be done through coloring, but now it is entirely carried out using X-rays. Apart from my own understanding and requirements based on practical production experience, it was only in the past three years that I came across some relevant standards (electronic versions of these standards are available for download online or within Haichuan): FJJ 211-86 – Specifications for the construction and acceptance of jacketed pipes; SH/T 3040-2002 – Design specifications for pipelines and jacketed pipes in the petrochemical industry; SH/T 3040-2012 – Design specifications for pipelines and jacketed pipes in the petrochemical industry; SH/T 3546-2011 – Specifications for the construction and acceptance of jacketed pipes in the petrochemical industry

Jacketed tubes are divided into full jackets and half jackets

This post was last edited by Down the hillside on 2017-5-22 at 12:42. Dear seniors, if any of you are working on jacketed pipeline projects in Jiangsu, Zhejiang, or Shanghai, please leave a message. Urgent

It depends on the operational requirements; when the requirements are not high, a larger tube sleeve is used around a smaller tube, with the smaller tube being welded together. The larger tube, which is shorter than the smaller one, is welded to the smaller tube by making an opening in it and joining them together