Entry into a Confined Space Procedure

Petroleum Development Oman LLCRevision: DRAFT

Effective: Dec-5

Petroleum Development Oman LLCRevision: 4.0Effective Jul-11

Petroleum Development Oman L.L.C.

Document Title: Entry into a Confined SpaceDocument IDPR-1148

Document TypeProcedure

SecurityUnrestricted

DisciplineEngineering and Operations

OwnerFunctional Production Manager (UOP)

Issue DateJuly 2011

Revision4.0

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i Document AuthorisationAuthorised For Issue July 2011

ii Revision History

The following is a brief summary of the 4 most recent revisions to this document. Details of all revisions prior to these are held on file by the issuing department.

Revision No.AuthorScope / Remarks

4.0July-11Robin Norman UOP6Refer to Addendum 2 for changes

Apr-11Added Section 1.9 - ALARP

Rev 3.1Nov-09Robin Norman UOP6/ Del Ellbec UOP7For minor changes refer to Addendum 1

Rev 3.0Feb-09Robin Norman UOP6Revised Sections 2.1 & 2.2.

Added use of Dragger Tubes for testing prior to Confined Space Entry

Added Appendix 1 Reference Material

Rev 1Nov-98UOP/1SI-19 re-written in new format.

iii Related Business Processes

CodeBusiness Process (EPBM 4.0)

EP.71.02Operate Wells and Facilities

iv Related Corporate Management Frame Work (CMF) Documents

The related CMF Documents can be retrieved from the CMF Business Control Portal.

TABLE OF CONTENTS

61Introduction

1.1Background61.2Purpose61.3Distribution / Target Audience61.4Changes to the Document61.5Step-out Approval71.6ALARP72Roles and Responsibilities83Confined Space Entry Procedure103.1Preparation for Confined Space Entry103.1.1Potential Hazards Associated with Confined Space Entry103.1.2Planning and Risk Assessment103.1.3Gas Freeing and Flushing123.1.4Working Atmosphere123.1.5Ventilation143.1.6Positive Isolation143.1.7Use Naked Flames and Arc143.1.8General153.2Confined Space Entry Process15Appendix 1 Narcotic Effect of Hydrocarbons19Appendix 2 Abbreviations20Appendix 3 Reference Material21Appendix 4 User Feedback Page22Addendum 1 Changes at Revision 3.123Addendum 2 Changes at Revision 4.024

1 Introduction

1.1 Background

The nature of industry in which PDO operates frequently requires personnel to enter Confined Spaces to carry out inspections and / or maintenance and repair work. A confined space:

Has limited or restricted means of entry or exit

Is large enough for an employee to enter and perform assigned work, and

Is not designed for continuous occupancy by the employee.

A permit-required confined space is one that meets the definition of a confined space and has one or more of these characteristics:

Contains or has the potential to contain a hazardous atmosphere,

Contains a material that has the potential for engulfing the entrant,

Has an internal configuration that might cause an entrant to be trapped or asphyxiated by inwardly converging walls or by a floor that slopes downward and tapers to a smaller cross section, and/or contains any other recognised serious safety or health hazards. These shall include but are not limited to:

Process vessels i.e. separators, pressure vessels

Storage tanks

Compressor enclosures

Heaters and boilers

Flare and vents systems

Cellars and pits

Culverts

1.2 Purpose

The purpose of this procedure is to provide all personnel, PDO or contract, with clear and concise instructions for entering or working within a confined space.1.3 Distribution / Target Audience

This procedure is intended for use production and maintenance personnel and any other parties tasked with carrying out work covered by this procedure on behalf of PDO.

1.4 Changes to the Document

Responsibility for the upkeep of the Document shall be with the Functional Production Manager UOP, the Owner. Changes to this document shall only be authorised and approved by the Owner.

Users of the Document who identify inaccuracy or ambiguity can notify the Custodian or his/her delegate and request changes be initiated. The Requests shall be forwarded to the Custodian using the User Feedback Page provided in this Document.

The Document Owner and the Document Custodian shall ensure review and re-verification of this procedure every 3 years.

1.5 Step-out Approval