Method for calculating wall thickness of anti-explosion pipeline based on equivalent load

Abstract

The invention discloses a method for calculating the wall thickness of an anti-explosion pipeline based on an equivalent load, and the method comprises the following steps: firstly, considering the most dangerous condition according to the type of combustible gas in the pipeline and the type of oxidizing gas which is possibly mixed into the pipeline, namely, when the mixing ratio of the combustible gas to the oxidizing gas in the pipeline is a stoichiometric ratio, calculating the detonation pressure of detonation of the mixed gas in the pipeline, taking k times of the detonation pressure as equivalent static pressure, then calculating the wall thickness of the pipeline preliminarily according to a formula, and obtaining the final wall thickness of the pipeline by rounding upwards. According to the method, the service installation condition of the pipeline and different explosion scenes possibly occurring in the pipeline are fully considered, the pipeline design requirement can be met in a more targeted mode, the designed pipeline has the more appropriate wall thickness while the anti-explosion performance is met, and therefore better economical efficiency is achieved; the method is convenient and rapid to implement, and the professional degree requirement on personnel is low.

Description

technical field [0001] The invention relates to the field of pipeline explosion prediction, in particular to a method for calculating the wall thickness of an anti-explosion pipeline based on an equivalent load. Background technique [0002] In the fields of national defense, chemical industry, nuclear power, public safety, etc., the design of some cylindrical shell structures or pipelines needs to meet the requirements of anti-explosion performance, that is, the internal explosion structure will not fail, and meet the design requirements of its intrinsic safety. A key point in the design of explosion-resistant vessels or pipelines is the calculation and determination of wall thickness. At present, there are mainly two types of methods. One category is theoretical or empirical methods, such as equivalent single-degree-of-freedom methods. The basic idea of ​​this type of method is to calculate the equivalent static pressure of the explosive load, and then calculate the wall ...

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Problems solved by technology

This type of method has high requirements on the professional level of the implementers, and the numerical analysis results are affected by the selection of the constitutive model and the size of the mesh. It is often necessary to verify the model before the specific implementation, and the implementation period is long and difficult.

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