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M AIN OFFICES13 111 Nor thwest FreewaySui te 200Hous ton,Texas 7704 0Ph 7 1 3 51 0 22 0 0Fx 7 1 3 68 8 9 16 6email hydrotech@oils tates.com

SALES OFFICEBlackness RoadAltens Industr ial EstateAberdeen AB12 3LHScot landPh ( 44 ) 1 2 2 4 8 9 6 19 0Fx ( 44 ) 1 2 24 8 9 6 1 9 9

SALES OFFICENo. 9 Pandan CrescentS i n ga p o r e 1 2 8 4 6 5P h ( 6 5 ) 6 7 7 3 7 5 5 5Fx ( 6 5 ) 6 7 7 3 7 6 6 7

SALES OFFICE3 6 , B d d e s Oc e a n s132 75 Marsei lle Cedex 9FranceP h ( 3 3 ) 4 9 1 2 9 1 8 3 3F x ( 3 3 ) 4 9 1 2 9 1 8 4 3

w w w . o i l s t a t e s h y d r o t e c h . c o m

2002 Oil States Industries Incorporated

API 6H-00 01

Oil States HydroTech

since 196 6Subsea Pipeline Technology

Pressure-Balanced Safety JointProtects your investment in major offshore systems

Retainer ring

Body

Vent

Pressure-balancingpiston

Shear pins

Sleeve End flange

The Pressure-Balanced Safety Joint (PBSJ) separates at a presetaxial load, independent of pipeline pressure, to prevent damageto platforms, offshore tanker loading installations, subsea pro-duction systems, or lateral t ie-ins caused by a dragging anchor,mud slide, iceberg scouring,or other force. Employing the PBSJin conjunction wi th optional upstream and downstream checkvalves also prevents product loss and environmental damage.The PBSJ is completely assembled and tested at the factory; noonsite preparation is required before flanging it into thepipeline.

Tension load is transferred through the PBSJ sleeve to the bodyvia shear pins. When a potenti ally damaging external forceequal to or exceeding the shear-pin rating is applied, the pinsshear and the PBSJ separates, preventing damage to your equip-ment. Internal pipeline pressure and external water pressurewill not cause the PBSJ to separate, because a pressure-compen-sating piston balances hydrostatic loads.

The rated separation load can be easily changed at any timeprior to installation by varying the number of shear pins. Aseparated PBSJ can be reinstalled after being refurbished by OilStates HydroTech.

The PBSJ is easily installed with the pipeline or flowline,usingconventional construction techniques, working from lay barges,

reel barges, or using pull-in methods. A removable spli t retainerring protects the shearing mechanism against tension loads dur-ing installation. A diver removes this retainer ring after pipelineinstallation i s complete.

The standard PBSJ is available in a variety of configurations,including butt-weld by butt-weld and flange by flange. The lat-ter is available with optional upstream and/or downstream

check valves. These check valves areful l-opening,flapper-type designswith subsea tr im. The downstreamcheck valve is a conventionaldesign, but the upstream valve isused in reverse and is modified for

the PBSJ. An extension sleeveattached to the sleeve of the PBSJholds the spring-loaded flapper ofthe upstream check valve open and

PBSJ with optional upstream and downstream check valves

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2002 Oil States Industries Incorporated

Pressure-Balanced Safety Joint, Page 2

A Pressure-Balanced Safety Joint provides sureprotection when used in a lateral tie-in line.

When installed with subsea trees, a Pressure-Balanced Safety Joint protects all seafloorequipment.

A Pressure-Balanced Safety Joint preventsdamage to the riser and possibly to the jacket.

A B C DN om ina l Pre ssure We ld-ne ck B ore Out side Ove ra ll Approxim at e M a xim umpipe size ra t ing OD size dia m eter le ngth weight sepa ra t ion loa d

in. in. in. in. in. lb lb

2 5000 API 2.50 2.06 10.50 15.00 250 95,00010000 API 2.94 2.06 12.00 16.00 350 104,000

3 5000 API 3.81 3.12 12.50 17.00 400 113,00010000 API 4.34 3.06 15.50 21.00 750 223,0001500 ANSI 3.50 2.90 10.50 15.00 225 78,000

4 5000 API 5.00 4.06 15.00 20.00 650 201,00010000 API 5.75 4.06 18.00 26.00 1200 390,000

900 ANSI 4.50 3.83 11.50 16.00 325 82,0001500 ANSI 4.50 3.62 12.25 17.00 375 114,000

6 900 ANSI 6.62 5.76 15.00 20.00 600 217,0001500 ANSI 6.62 5.62 15.50 21.00 650 250,000

8 900 ANSI 8.62 7.62 18.50 25.00 1040 332,000

10 900 ANSI 10.75 9.75 21.50 27.00 1400 419,000

12 900 ANSI 12.75 11.75 24.00 31.00 1950 500,000

14 900 ANSI 14.00 12.81 24.25 33.69 2490 650,000

16 900 ANSI 16.19 14.69 29.50 29.00 2230 730,000

CAB

D

allows pigging from either direction during normal pipelineoperation. If a downstream check valve is incorporated, it

should have a lock-open feature for the flapper, if bi-directionalpigging is anticipated.

Design Specifications

Pressure-Balanced Safety Joints meet the requirements ofAPI6Hand are designed in accordance with ASME Pressure VesselCode, Section VII I, Di vision 2, unless otherwise specified.Material and configurations of the butt-weld ends are in accor-dance with ASME B16.5 or M SS SP-44to match the pipeline.

The minimum recommended separation load of a PBSJ is25,000 lb. For separation loads between 25,000 lb and 50,000 lb,PBSJs are designed to separate within 10% of the specifiedvalue. For separation loads in excess of 50,000 lb, the precision

is within 5%.

Ordering Informat ion

Please provide the following information on any purchase orderor request for quotation:

Nominal pipe size Pipe wall thickness or bore Pipe grade Design rating Separation load Installation water depth Configuration Flange type and specification, if applicable

Pressure-BalancedSafety Joint