GB/T 26610.5-2022Guideline for implementation of risk-based inspection of pressure equipment system—Part 5: Quantitative analysis approach of failure consequence (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" drafted.

This document is part 5 of GB/T 26610 "Implementation Guidelines for Risk-Based Inspection of Pressure Equipment Systems". GB/T 26610 has The following sections were published.

--- Part 1: Basic requirements and implementation procedures;

--- Part 2: Risk-based inspection strategies;

--- Part 3: Qualitative analysis methods of risk;

--- Part 4: Quantitative analysis method of failure probability;

--- Part 5: Quantitative analysis methods for failure consequences.

This document replaces GB/T 26610.5-2014 "Implementation Guidelines for Risk-Based Inspection of Pressure Equipment Systems Part 5: Failure Consequences Compared with GB/T 26610.5-2014, in addition to structural adjustment and editorial changes, the main technical changes are as follows.

a) A list of types of consequences characterization applicable to various types of equipment/components has been added (see Table 1);

b) The data required for the quantitative analysis of failure consequences have been changed (see 5.1, 5.1 of the.2014 edition);

c) Added the classification table of economic consequences of heat exchanger tube bundles (see Table 3);

d) The basic workflow for quantitative analysis of failure consequences has been changed from textual representation to graphic representation (see 5.5, 5.5 of the.2014 edition);

e) Changed the diameter range of leakage holes used in consequence analysis (see Table 6, Table 4 of the.2014 edition);

f) The formula for calculating the damage area of equipment that cannot spontaneously combust the continuous leakage medium has been changed, and the maximum value of the resultant area has been canceled.

For the conditions in the range of 929m2, the calculation formulas for the liquid phase and gas phase of the medium leakage are combined, and the calculation of the effective leakage rate is deleted. formula (see 8.5.2, 8.5.2 of the.2014 edition);

g) Changed the calculation formula of equipment damage area where continuous leakage medium may spontaneously ignite, canceled the limitation of the maximum result area to For the conditions in the range of 929m2, the calculation formulas for the liquid phase and gas phase of the medium leakage are combined, and the calculation of the effective leakage rate is deleted. formula (see 8.5.3, 8.5.3 of the.2014 edition);

h) Changed the calculation formula for the damage area of equipment where the instantaneous leakage medium cannot spontaneously ignite, and canceled the limitation of the maximum value of the consequence area to For the conditions in the range of 929m2, the calculation formula for the phase state of the medium leakage is liquid and gas phase, and the calculation formula for the effective leakage amount is deleted. formula (see 8.6.2, 8.6.2 of the.2014 edition);

i) The formula for calculating the damage area of equipment that may spontaneously ignite the instantaneous leakage medium has been changed, and the maximum value of the resultant area has been cancelled For the conditions in the range of 929m2, the calculation formula for the phase state of the medium leakage is liquid and gas phase, and the calculation formula for the effective leakage amount is deleted. formula (see 8.6.3, 8.6.3 of the.2014 edition);

j) The constants in the formula for determining the balance factor based on auto-ignition temperature have been changed (see 8.10.1, 8.10.1 of the.2014 edition);

k) Changed the notation of parameters in the calculation of the consequence area for different toxic media (see 9.4, 9.4 of the.2014 edition);

l) Changed the formula for calculating the area of the result of hydrogen fluoride and hydrogen sulfide poisoning to reduce the complexity of the formula [see formula (44) and formula (45), formula (55) and formula (56) of the.2014 edition];

m) The calculation method of the poisoning consequence area for the instantaneous leakage of other common (10 kinds) toxic media has been added (see 9.4.4.2);

n) The conversion factor in the calculation formula for the evaporation proportion of the leaking medium involved in the cost of environmental cleanup in the economic consequences was added (see 12.6.2.2, 2014 version 12.6.2.2);

o) Changed the safety valve to a safety relief device, and corrected the pressure in the protected equipment under the overpressure condition of the safety relief device (see appendix).

A and Appendix B, Appendix A and Appendix B of the.2014 edition);

p) Changed the correlation coefficient in the calculation formula of mild to moderate leakage rate of safety relief devices (see B.3.1.1,.2014 edition of B.3.1.1);

q) Changed the continuous leakage time of the safety relief device with an inlet nominal diameter of DN >150 released to the atmosphere (see B.3.2.1,.2014 year edition B.3.2.1);

r) Changed the constant coefficient in the calculation formula of heat exchanger tube bundle replacement cost (costbundle) [see C.5.1 formula (C.3),.2014 edition The C.5.1 formula (C.3)];

s) Commonly used heat exchanger tube bundle materials are added, and the cost factors for different tube bundle materials and carbon steel tube bundles are corrected (see Table C.1, Table C.1 of the.2014 edition);

t) Added the technical content of the quantitative analysis method of furnace tube failure consequences (see Appendix D);

u) Changed the equipment damage cost of different equipment types corresponding to various leakage holes (see F.2.1, E.2.1 of the.2014 edition);

v) Changed the estimated value of downtime caused by leakage of each type of leak (see F.2.3, E.2.3 of the.2014 edition).

Introduction

Risk-based inspection (RBI) is not only a scientific and reliable inspection mode, but also includes advanced management and maintenance concepts.

The engineering application practice of RBI over the years has shown that RBI in my country's petrochemical industry can achieve long-term safe operation of production units and reduce production costs.

It has played a huge role in increasing the cost, increasing economic benefits and enhancing the competitiveness of enterprises. GB/T 26610.1 first formulated in.2011 and

GB/T 26610.2~26610.5, which was first formulated in.2014, formed my country's RBI technical standard system and ended the development of RBI in my country. According to the history of foreign standards.

This document (GB/T 26610.5) is part 5 of GB/T 26610.The consequences of failure are necessary components that constitute the operation risk of pressure equipment.

The purpose of the analysis is to classify the potential failure consequences of pressure equipment. This document provides scientific post-failure results for the implementation of RBI projects.

The quantitative analysis method can also provide relevant reference and help for the risk-based design of pressure equipment.

Since the implementation of GB/T 26610.5-2014, a large amount of empirical data has been accumulated and needs to be absorbed and applied; economic consequences analysis The relevant data are related to the social price level and should be updated to maintain the rationality of the analysis results;

Relevant research results have been obtained on the control methods of failure consequences of The key technology research of the key research and development plan project "High-parameter pressure special equipment risk prevention and control and key technology research" has been completed. Revision of GB/T 26610.5-2014.

1 Scope

This document specifies a method for quantitative analysis of failure consequences during risk-based inspection (RBI) of pressure-bearing equipment systems.

This document applies to the pressure equipment system referred to in GB/T 26610.1-2022.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 26610.4-2022 Implementation Guidelines for Risk-Based Inspection of Pressure Equipment Systems Part 4: Quantitative Analysis of Failure Probability method

3 Terms, Definitions and Symbols