ДСТУ EN 16299:2022 Катодний захист зовнішніх поверхонь фундаментів надземних резервуарів, що контактують із ґрунтом або фундаментом (EN 16299:2013, IDT)



ДСТУ EN 16299:2022
(EN 16299:2013, IDT)

Катодний захист зовнішніх поверхонь фундаментів надземних резервуарів, що контактують із ґрунтом або фундаментом

 
     
Не є офіційним виданням.
Офіційне видання розповсюджує національний орган стандартизації
(ДП «УкрНДНЦ» http://uas.gov.ua)

Contents

Foreword

Introduction

1 Scope

2 Normative references

3 Terms and definitions

4 Abbreviations and symbols

5 Competence of personnel

6 Corrosion risks and their prevention by cathodic protection

6.1 General

6.2 Corrosion risks of external surfaces of above ground storage tank bottoms in contact with soil or foundations

7 Pre-requisites for the application of cathodic protection

7.1 General

7.2 New tanks

7.2.1 Tank cushion material

7.2.2 Ring beam of the tank

7.2.3 Bottom external coatings

7.2.4 New tank with membrane

7.2.5 New tank without membrane

7.3 Existing tanks

7.3.1 Extent of corrosion

7.3.2 Electrical isolation

7.3.3 Secondary steel bottoms

7.4 Tank design and feasibility of cathodic protection

8 Criteria for cathodic protection and measurement techniques

8.1 General

8.2 Criteria

8.2.1 Primary criteria

8.2.2 Measurement methods

8.2.3 Coupon IR free potential measurement

8.3 Alternative criteria and methods

8.3.1 General

8.3.2 Coupon current density measurements

8.3.3 Peripheral potential measurements

8.3.4 Electrical resistance probes

9 Design of cathodic protection systems

9.1 General

9.2 Structure details and data

9.2.1 General

9.2.2 Location

9.2.3 Tank design

9.2.4 Safety data

9.3 Environment

9.3.1 General

9.3.2 Native surrounding soil

9.3.3 Cushion

9.3.4 Neighbouring structures

9.4 Electrical isolation

9.5 Current requirements

9.6 Cathodic protection systems and anode configuration

9.7 Cable connections to the tank

9.8 Reference electrodes, coupons and test stations

9.9 Explosion hazard prevention

9.9.1 General

9.9.2 Electrical equipment installation

9.9.3 Isolating joints

9.10 Galvanic anode systems

9.10.1 General

9.10.2 Materials

9.10.3 Location

9.10.4 Connection of anodes to the structure

9.11 Impressed current systems

9.11.1 General

9.11.2 Anode materials

9.11.3 Transformer-rectifiers

9.11.4 Groundbeds

9.12 Cables

9.13 Interference

10 Installation of cathodic protection systems

10.1 General

10.2 Installation of cables

10.2.1 General

10.2.2 Cable connections to structures

10.3 Isolating joints

10.4 Anodes

10.4.1 Galvanic anodes

10.4.2 Impressed current anodes

10.5 Impressed current stations

10.5.1 Location

10.5.2 Electrical installation

10.6 Test stations, measuring points, permanent reference electrodes, and coupons

10.7 Bonding

10.8 Labelling

10.9 Installation checks

10.10 As-built documentation

11 Commissioning

11.1 General

11.2 Preliminary checking

11.3 Start-up

11.4 Verification of the cathodic protection effectiveness

11.5 Determination of relevant measuring points

11.6 Commissioning documents

12 Inspection and maintenance

12.1 General

12.2 Inspection

12.2.1 General

12.2.2 Functional checks of equipment

12.2.3 Measurements assessing cathodic protection effectiveness

12.2.4 Inspection intervals

12.2.4.1 Frequency of equipment functional checks

12.2.4.2 Frequency of the verification of the cathodic protection effectiveness

12.2.5 Inspection report

12.3 Maintenance

12.3.1 General

12.3.2 Cathodic protection equipment

12.3.3 Instrumentation

Annex A (informative) Groundbed data

A.1 General considerations

A.2 Types of ground beds

A.2.1 Remote located ground beds

A.2.2 Close located groundbeds

A.2.3 Anode system located under tank bottom

A.3 Anodes types

A.3.1 General

A.3.2 High silicon cast iron anodes

A.3.3 Titanium Mixed-Metal Oxide anodes

Bibliography