SH 3009-2013 Code for Design of Flammable Gas Emission Systems in Petrochemical Industries
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9.2.14 The installation of process thermal pipelines laid on steel tower frames or furnace shells shall meet the following requirements: a) Steam pipelines, pipelines with insulation and heating, ignition pipes, and fuel gas pipelines shall be designed with thermal compensation measures, and corresponding fixing brackets shall be provided； b) There should be no dead spots in the process thermal pipelines installed on the steel tower frames or flare cylinders ； c) Normal-temperature pipelines should be equipped with at least 1 fixed support ； d) The ignition pipe and fuel gas pipeline at the bottom of the flare should be connected to the horizontal pipes using tees, and flanges and flange covers should be provided at the ends of the vertical pipes. In a), the fuel gas is usually at room temperature, so why is it still necessary to design thermal compensation measures? Why are flanges and flange covers provided at the vertical ends in d)?
@liaifeng @ZDICK888 @ZhizheMing Is Fanange there for maintenance? ? ?
In a), the fuel gas is usually at room temperature, so why is it still necessary to design thermal compensation measures? Flare exhaust gas is gas at high and medium temperatures that gradually cools to normal temperature in the flare pipeline; in emergency situations, a large amount of gas is released from the facility instantaneously, and expansion bends are required to relieve stress. Why are flanges and flange covers provided at the vertical ends in d)? The torch tube is an open, hollow cylinder; flanges and flange covers are provided at its vertical ends to ensure that no liquid or substances remain trapped inside
The wise person is not just an artist; they also understand the principles behind things – impressive! As for the reasoning, it is indeed as you said.
In a), the fuel gas is usually at room temperature, so why is it still necessary to design thermal compensation measures? You yourself said it’s ordinary; the setting of thermal compensation is for dealing with extraordinary situations. Why are flanges and flange covers provided at the vertical ends in d)? I think the flange cover at the end is used for draining liquid or removing impurities