Petroleum, petrochemical and natural gas industries. Venting of atmospheric and low-pressure storage tanks

BS EN ISO 28300:2008 Petroleum, petrochemical and natural gas industries. Venting of atmospheric and low-pressure storage tanks

BS EN ISO 28300 is an International Standard which covers the normal and emergency vapour venting requirements for aboveground liquid-petroleum or petroleum-products storage tanks and aboveground and underground refrigerated storage tanks designed for operation at pressures from full vacuum through 103,4 kPa (ga) [15 psig].

BS EN ISO 28300 discusses the causes of overpressure and vacuum; determination of venting requirements; means of venting; selection, and installation of venting devices; and testing and marking of relief devices.

BS EN ISO 28300 is intended for tanks containing petroleum and petroleum products but it can also be applied to tanks containing other liquids. However, it is necessary to use sound engineering analysis and judgment whenever BS EN ISO 28300 is applied to other liquids.

BS EN ISO 28300 does not apply to external floating-roof tanks.

Contents of BS EN ISO 28300:

Foreword

Introduction

1 Scope

2 Normative references

3 Terms, definitions and abbreviated terms

4 Non-refrigerated aboveground tanks

4.1 General

4.2 Causes of overpressure or vacuum

4.3 Determination of venting requirements

4.4 Means of venting

4.5 Considerations for tanks with potentially flammable atmospheres

4.6 Relief-device specification

4.7 Installation of venting devices

5 Refrigerated aboveground and belowground tanks

5.1 General

5.2 Causes of overpressure or vacuum

5.3 Relief-device specification

5.4 Installation of venting devices

6 Testing of venting devices

6.1 General

6.2 Flow-test apparatus

6.3 Method for determining capacities

6.4 Production testing

7 Manufacturer's documentation and marking of venting devices

7.1 Documentation

7.2 Marking

Annex A (informative) Alternative calculation of normal venting requirements

Annex B (informative) Basis of emergency venting for Tables 7 and 8

Annex C (informative) Types and operating characteristics of venting devices

Annex D (informative) Basis of sizing equations

Annex E (informative) Basis for normal out-breathing and normal inbreathing

Annex F (informative) Guidance for inert-gas blanketing of tanks for flashback protection

Bibliography