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TALISMAN

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NAO ENGINEERING SPECIFICATIONS - PIPELINES

FLANGE ISOLATING KITS NAO-SPC-D-PL-001

FLANGE ISOLATING KITS

Issue: 2011/01/01

Next Review Date:

June 2011

HSE/OI Staff Responsible:

Corrosion Technical Authority

Published by: Talisman Energy Inc.

APPROVALS:

Tech Auth:

Eng. Auth:

VP-HSEOI:

Operational Integrity Department Calgary

Copyright is owned by Talisman Energy Inc. All rights are hereby reserved. This document (in whole or in part) may not be reproduced, stored in a retrieval system, or transmitted, in any form or means, without the prior written permission of Talisman, or as expressly permitted by law.

Note: This is an existing specification currently being used by Talisman and has not been

technically reviewed or signed off by the Technical Authority at this time. Over time, these specifications will be rebuilt and validated through a specification review process. Please ensure that you use the most current copy of the specs listed on the NAO Portal under Engineering Specifications. The Technical Authority identified on the cover sheet is the point of contact for this specification.

Attention: Paper copies are uncontrolled. This copy is valid only at time of printing, 12/15/2010. The controlled document is available on the Talisman NAO Portal.

TALISMAN ENERGY INC.

FLANGE ISOLATING KITS

GENERAL SPECIFICATION

Revision 0

March 2003

Page 1 of 6

ES1.L110

TABLE OF CONTENTS

I. SCOPE.................................................................................................................................................................2

2. APPLICABLE CODES, REGULATIONS, STANDARDS AND SPECIFICATIONS................................2

3. DESIGN CONSiDERATIONS.........................................................................................................................2

4. MATERIAL SELECTION AND APPROVED MANUFACTURERS..........................................................3

5. INSTALLATION PROCEDURES ...................................................................................................................4

6. TESTING.............................................................................................................................................................5

TALISMAN ENERGY INC.

FLANGE ISOLATING KITS

GENERAL SPECIFICATION

Revision 0

March 2003

ES1.L110

Page 2 of 6

1. SCOPE

1.1.1. This specification covers the Talisman Energy Inc. (TLM) requirements

for selection, installation, and testing of flange isolating kits. These

flange isolating kits are installed at flanges to prevent current flow from

the pipeline cathodic protection system to structures not requiring protection, or to effectively separate different cathodic protection

systems from each other. The isolation kit includes an insulating gasket

surround the flange studs, and insulating washers on both ends of the stud.

1.1.2. This specification is not intended to cover pipeline construction, which is

(consisting of a retainer and a sealing element), insulating sleeves to

described in TLM General Specification ES1. L 104; or the construction

of pressure piping systems designed to ANSIIASME 831.3 - Code for Pressure Piping - Chemical Plant and Refinery Piping, which is covered in TLM General Specification ES1.L 102. It should be noted that flange isolating kits can be installed on either piping system.

2. APPLICABLE CODES, REGULATIONS, STANDARDS AND SPECIFICATIONS

2.1. TLM Specifications

. ES1.L 102 - Piping Fabrication, Erection, and Testing

. ES 1. L 109 - Pipeline Construction

2.2. Manufacturer's Specifications

. Pikotek Inc. Installation Instructions

. Pipeline Seal and Insulator, Inc. (PSI) Flange Make Up Procedure

3. DESIGN CONSIDERATIONS

3.1.1. Piping design is not within the scope of this specification, and is covered by the other referenced standards. The first above ground flange at a riser is usually regarded as the obvious location for an insulating gasket

from the perspective of defining a clean break between the underground

The pipe riser design must provide adequate support to ensure that the

external stresses on the insulating gasket are within the manufacturer's

(cathodically protected) system and above ground (unprotected) system.

limits. In this fashion, the piping design will meet the requirements for

effective electrical isolation, while also ensuring that the external stresses imposed on the insulating gasket are within acceptable limits.

TALISMAN ENERGY INC.

FLANGE ISOLATING KITS

GENERAL SPECIFICATION

Revision 0

March 2003

ES1.L110

Page 30f6

4. MATERIAL SELECTION AND APPROVED MANUFACTURERS

4.1 Recommended Materials and Manufacturers

The flange insulating kits shall conform to the following table.

Table 4.1: Material Selection and Approved Manufacturers

Service

(Note 1)

Retainer

Material

Pyrox Epoxy Pyrex Epoxy Pyrox Epoxy Pyrex Epoxy Pyrex Epoxy Pyrox Epoxy

G-10 G-10 G-10 G-10 G-10 G-10

Sealing Element

Material

(Note 2)

Sleeve

Material

(Note 3)

Insulating

Approved Manufacturer

and Product

(Notes 5 and 6)

washer

material

INote4) G-10

Up to 600 ANSI, sour,

non-vibratorv service

Teflon

Viton

Mylar

Mylar

PSI "Linebacker G-1 0";

Pikotek" VCS G-10".

Up to 600 ANSI, sweet,

non-vibratory service

G-10 G-10 G-10 G-10 G-10

PSI "Linebacker G-1 0"; Pikotek "VCS G-10".

PSI "Linebacker G-10";

ANSI, sour, nonvibratorv service 900 ANSI, sweet, nonvibratory service All ANSI classes, sour vibratorv service All ANSI classes, sweet vibratory service

900

Teflon

Viton

G-10 G-10 G-10 G-10

Pikotek "VCS G-10".

PSI "Linebacker G-10";

Teflon

Viton

Pikotek "VCS G-10". Pikotek "VCS G-10". Pikotek "VCS G-10".

Notes for Table 4.1 :

1. For the purpose of this specification, "Vibratory Service" is defined as field sites with

reciprocating compressors.

2. The sealing element shall be pressure energized.

3. The sleeves shall be precisely sized to fit halfway into each steel washer.

4. Each kit shall contain two 3 mm thick zinc plated steel washers and two 3 mm thick insulating washers per stud. The steel washers are provided to protect the insulating washer from damage by the nut. The insulating washer shall have an inside diameter which fis over the insulating sleeve, and an outside diameter to match the steel washer. 5. The full manufacturer names and product descriptions are as follows: Pipeline Seal and Insulator (PSI) Inc. Linebacker G-10, available from Martech Marketing Limited; and

Pikotek Inc. G-10 VCS Gasket, available from Pipe Tech Corporation Ltd. The insulating kits will be ordered by manufacturer's name, product description, flange size, flange ANSI

rating, and type (Le. RF (type F) or RT J (type D) as required to match the pipe flange), retainer material, sealing element material, sleeve material, and insulating washer

materiaL.

6. In some Operating Districts, the "standard" isolating kit (neoprene faced phenolic gasket, with mylar sleeves and G-10 washers, supplied by Advanced Products & Systems or PSI;

or the neoprene faced phenolic gasket with Minion integral sleeves and washers,

supplied by the AGS group) has performed well, and may be substituted for the products in the above table SUBJECT TO APPROVAL BY OPERATIONS. The selection of

insulating gasket type should be agreed to in the P&ID review.

TALISMAN ENERGY INC.

FLANGE ISOLATING KITS

GENERAL SPECIFICATION

Revision 0

ES1.L110

March 2003

Page 4 of6

4.2 Material Descriptions

Viton: A general purpose elastomer with excellent resistance to olefin and paraffn hydrocarbons and glycols. Offers good resistance to aromatic

hydrocarbons. Generally not recommended for use with amine based inhibitors or in systems with a CO2 content of greater than 5%. The allowable temperature range is -25 C to 175 C. Viton GLF can be used to a low temperature limit of 54 C.

Teflon: A material suitable for all environments, especially robust in

environments containing hydrocarbons, glycols, and H2S. Excellent in systems with greater than 5% C02. Temperature range is -56 C to 230 C.

G-10 (glass reinforced epoxy): an extremely strong material particularly well suited to harsh conditions and the high forces caused by crushing, twisting, thread pinching or bending. Suitable for temperatures to 180 C.

Mylar: A general purpose material recommended for applications below 100 C.

Mylar sleeves are suitable for less crucial service. This material does not have the strength or durability of G-1 0, but is less expensive. It has "fair" resistance to cracking and crushing but is less "forgiving" than G-10. Therefore, care during installation and preventing movement of the piping during service becomes more

criticaL.

5. INSTALLATION PROCEDURES

5.1.

5.1.1. The manufacturer's installation procedures shall be followed without

exception, including recommended bolt tightening sequences and final

torque values. The Contractor's supervisor shall be responsible for

following these procedures.

5.1.2. Flanges shall be correctly aligned to prevent damage to the insulating

sleeves and gasket.

TALISMAN ENERGY INC.

FLANGE ISOLATING KITS

GENERAL SPECIFICATION

Revision 0

March 2003

ES1.L110

Page 50f6

6. TESTING

6.1. General Requirements

6.1.1. All flange isolation kits shall be tested to verify effective electrical

isolation. Testing shall be the responsibility of the piping installation contractor.

6.1.2. Acceptable testing methods are the Stationary Reference Method, the

AC Resistance Method, the RF Meter Method, and the Voltmeter

Method.

6.1.3. The Contractor shall submit the test results for review by TLM or

designated representative prior to placing the piping system into service. A successful test is required. The kit shall be replaced until a successful test is achieved.

6.2. Stationary Reference Test Method

6.2.1. Refer to Appendix I, Method 1: Stationary Reference. The test will

measure the potential of each side of the insulated flange to a stationary copper-copper sulfate reference electrode. The reference electrode is

connected to the meter negative terminal, and the pipe system is

connected to the meter positive terminaL. The meter is set to display DC Volts.

6.2.2. If the insulation is effective, the potential measured on one side of the insulating flange will differ from the potential measured on the other

side. If the insulation is not effective, the potentials will be equal.

6.3. AC Resistance Meter Method

6.3.1. Refer to Appendix I, Method 2: AC Resistance Meter. Measure the

resistance across the flanges to be tested using a soil resistivity meter

according to the meter operating manuaL.

6.3.2. If the insulation is effective, a resistance will be measured across the

flanges.

6.4. RF Meter Method

6.4.1. See Appendix II, Method 3: RF Meter Method. Connect an RF

insulation tester on each side of the insulated flange.

6.4.2. Operate the insulation tester according to the operator's manual to

determine if the insulation is effective.

TALISMAN ENERGY INC.

FLANGE ISOLATING KITS

GENERAL SPECIFICATION

Revision 0

ES1.L110

March 2003

Page 6 of6

6.5. Voltmeter Method

6.5.1. See Appendix II, Method 4: Voltmeter Method. Note that this method

can only be used if one side of the insulating flange is cathodically

protected during the test.

6.5.2. Use a multimeter switched to display DC Volts. Connect the meter

leads across the insulated flange as per the drawing. The negative

meter lead connects to the cathodically protected side, and the positive lead connects to the unprotected side.

6.5.3. A reading of -0.10 volts or more negative is indicative of effective

isolation.

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