17-09 - Instrument Air Package

MAMTECH SERVICES LIMITED Specification 17.09

17.09 - INSTRUMENT AIR PACKAGE

07/07/15

1

17/06/14

0

ISSUED FOR APPROVAL

DATE

REV.

DESCRIPTION

PREPARED BY F.OLUWASEGUN

CHECKED BY M. DUGBOR

APPROVED BY A. ADEBISI

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE TABLE OF CONTENTS SECTION 1.0

SCOPE

2.0

APPLICABLE DOCUMENTS

3.0

REQUIREMENTS 3.1

4.0

CHARACTERISTICS 4.1 4.2

5.0

Package Driver Diesel and Gas Engines Electric Motors V-belt Drives

COMPRESSORS 6.1 6.2 6.3 6.4 6.5 6.6

6.7 7.0

Performance Maintainability

DESIGN AND CONSTRUCTION 5.1 5.2 5.3 5.4 5.5

6.0

Item Definition

General Reciprocating Compressors Compressor Design Compressor Ancillary Equipment Air Receiver Compressed Air Dryer System 6.6.1 General 6.6.2 Desiccant Towers 6.6.3 Controls, Indicators and Alarms 6.6.4 Prefilter System 6.6.5 Dry Air Filter System Heat Exchangers

EQUIPMENT REQUIREMENTS 7.1 7.2

General Carbon Steel Piping TABLE OF CONTENTS - Continued Page 1 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE SECTION 7.3 7.4 7.5 7.6 7.7 7.8

7.9 8.0

IDENTIFICATION AND MARKING 8.1 8.2 8.3

8.4 9.0

Instrument Piping and Connections Connections Threaded Connections Interconnections Electrical Controls and Instrumentation 7.8.1 General 7.8.2 Control Panels 7.8.3 Compressor Control Sequence Skid

General Safety Bid Information 8.3.1 Compressors 8.3.2 Air Dryer 8.3.3 Air Filters Documentation Requirements

QUALITY ASSURANCE PROVISIONS 9.1 9.2 9.3

Tests Special Tests and Inspections Quality Conformance Inspections

APPENDIX I

Standards and Codes

ATTACHMENTS 1 2 3 4 5 6

Utility and Instrument Air Compressor Data Sheet (2 Sheets) Reciprocating Compressor Data Sheet (4 Sheets) Electric Motor Data Sheet (2 Sheets) Vertical Vessel Data Sheet Diesel Engine Data Sheet (2 Sheets) Internal Combustion Engine Data Sheet (2 Sheets)

Page 2 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE 1.0

SCOPE This specification covers the minimum technical requirements for the design, manufacture and testing of single lift, packaged instrument air compressor systems suitable for installation on an offshore platform off the coast of West Africa. All components and sub-systems required for a complete and fully operable system shall be provided, whether or not specifically referenced in this or the other documents such as:    

P&ID Flow Diagrams Data Sheets Engineering Specifications

These items shall include but are not limited to, the instrument air package, drivers, auxiliary equipment, compressors, air receivers, dryers, interconnecting piping and valves, electricals and instrumentation and controls. For a specific instrument air system, this specification shall be used in conjunction with the Technical Requirements for that air system. Any exception to the requirements shall be submitted in writing for resolution by Company. 2.0

APPLICABLE DOCUMENTS

2.1

Contractor shall consider the most recent standards and codes issued by the associations and approved bodies listed in Appendix I as part of this specification.

3.0

REQUIREMENTS

3.1

Item Definition The instrument air package shall be a self-contained, skid-mounted system capable of providing compressed air in continuous service at the volumes and pressures specified in the Technical Requirements. The instrument air package shall include the following equipment as a minimum:      

Drivers Compressors Dryers Receiver Control Panel Auxiliary equipment necessary to complete the package Page 3 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE 4.0

CHARACTERISTICS

4.1

Performance

4.1.1

The instrument air package shall be suitable for the maximum rated operating conditions specified in the Technical Requirements.

4.1.2

The instrument air package shall have a minimum service life of 20 years while operating in the specified environment.

4.2

Maintainability

4.2.1

The instrument air system shall be designed for ease of maintenance.

4.2.2

Removal of any major assembly shall not be required for periodic maintenance or operator attention.

4.2.3

Contractor shall consider providing lifting equipment to facilitate maintenance, repair, and adjustment of the packaged equipment.

4.2.4

Critical items within the package shall be provided with installed spares to ensure 100 percent functional availability of the instrument air package.

4.2.5

If standby components are provided, valves shall be installed as necessary to bypass and/or allow removal of the standby components for maintenance without the necessity of draining or shutting down the compressor or driver.

5.0

DESIGN AND CONSTRUCTION

5.1

Package

5.1.1

The instrument air package shall include drivers, compressors, dryers, and auxiliary equipment as specified.

5.1.2

The instrument air package shall incorporate features that facilitate connection between the package and the equipment associated with the package such as additional storage capacity or cross-connection to the instrument air system.

5.1.3

The instrument air package shall be designed to withstand forces associated with offshore installation.

5.1.4

All instrument air package equipment shall be mounted on one skid.

5.1.5

Unless authorized in writing by the Company, the instrument air package dimensions shall not exceed that specified by the Technical Page 4 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE Requirements. 5.1.6

Each piece of equipment within the package shall be provided with the necessary lubrication system and fittings.

5.2

Driver

5.2.1

General

5.2.1.1 Compressors shall be driven by an air-cooled diesel or gas engine, or an electric motor as specified. 5.2.1.2 Package equipment shall be designed to meet or exceed the specified rated operating conditions. 5.2.1.3 The design shall not include negative tolerance for capacity. The maximum continuous horsepower (HP) shall be guaranteed by Contractor. 5.3

Diesel and Gas Engines

5.3.1

Gas and diesel engines shall comply with the Company Technical Requirements.

5.3.2

Air-cooled engines shall be compatible with available fuel systems and rated to provide maximum continuous reliable power consistent with fuel economy and ease of maintenance.

5.3.3

Starting systems shall incorporate an air or gas pneumatic starter, battery-driven electric starter, or a manual crank, as specified.

5.3.4

The fuel consumption of the driver shall be within 3 percent of the stated values based upon a fuel analysis provided by Company. Fuel consumption shall be in British thermal units per brake horsepower hour (BTU/BHP-HR). Calculations shall be based on the lower heating value of the fuel.

5.3.5

The engine rating shall exceed the maximum anticipated horsepower requirements for site operating conditions.

5.4

Electric Motors

5.4.1

Motors shall comply with the Company Technical Requirements.

5.4.2

Motors shall be 480 volt, three-phase, 60 hertz, totally enclosed, fan cooled (TEFC) induction motors with double-extensions shafts for mounting after cooler fans. Motors shall be furnished with space Page 5 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE heaters rated for 240 VAC, but sized and operated on 120 VAC power. 5.5

V-belt Drives

5.5.1

Unless otherwise specified the prime mover power transmission to the package compressors shall be a V-belt drive system.

5.5.2

Contractor shall supply all sheaves, belts, tensioning devices and belt guards required for the driver. If multiple belts are required, Contractor shall provide matched sets.

5.5.3

All belt drives shall be antistatic, oil-resistant material and shall be conservatively sized and rated with a typical service factor of 1.5.

5.5.4

A positive, belt-tensioning device shall be provided on all belt devices.

6.0

COMPRESSOR UNIT

6.1

General

6.1.1

Each instrument air package shall include two (2) 100% compressors.

6.1.2

Under normal operating conditions, one compressor shall operate with the other on standby.

6.1.3

The compressors shall be designed for a maximum working pressure of 150 PSIG minimum.

6.2

Reciprocating Compressors

6.2.1

Compressors shall be of the air-cooled, one- or two-stage, single acting, V-belt driven reciprocating type in accordance with Company Technical Requirements.

6.2.2

Compressors shall be of the non-lubricated type.

6.2.3

Compressors shall be either a horizontal or vertical design. Unbalanced forces and moments of the compressor shall be minimized with counter-weights.

6.3

Compressor Design

6.3.1

Compressor cylinder(s) shall include integral fins for air cooling. Water-cooled cylinders may be provided on compressors above 50 brake horsepower (BHP) with written Company approval.

6.3.2

Unless otherwise specified, the unit shall include a distance piece long enough to ensure that no section of the connecting rod in contact with Page 6 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE the crankcase oil enters the air compression chamber. 6.3.3

The piston rod shall be assembled with oil wiper rings.

6.3.4

Rod packing shall be teflon, or a teflon based material.

6.3.5

Unless otherwise specified, the piston compression and rider rings shall be teflon, or a teflon based material.

6.3.6

Automatic suction valve unloaders shall be provided.

6.4

Compressor Ancillary Equipment

6.4.1

As a minimum, each compressor shall be equipped with the following:      

6.4.2

Air intake filter and silencer Sectionalized air-cooled intercooler complete with safety valve and bleeder valves Discharge pulsation dampener Constant level, splash-type lubrication (for crank-shaft only) Instrument panel with gauges for oil intercooler, and discharge pressures (may be common to one or more compressors) V-belt drive system with guards

Inlet Air Filter Unless otherwise specified, each compressor shall be fitted with a dry-type inlet air filter-silencer.

6.5

Air Receiver

6.5.1

A dry air receiver shall be supplied with each instrument air package.

6.5.2

The air receiver shall be manufactured in accordance with the Company Technical Requirements and ASME Section VIII, Division 1, Pressure Vessel Code. Vessels shall be code stamped.

6.5.3

The air receiver shall be mounted vertically, unless otherwise specified, or if the physical size exceeds the specified height limit.

6.5.4

Capacity of the air receiver shall be as stated in the Technical Requirements.

6.5.5

The air receiver shall include the following as a minimum:   

Safety relief valve Pressure gauge Temperature indicator Page 7 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE    

Automatic drain trap Manual drain and blowdown valves Inspection access Level gauge

6.6

Compressed Air Dryer System

6.6.1

General

6.6.1.1 The air dryer system shall be a twin tower, pressure swing, heatless regeneration desiccant type provided in accordance with the Technical Requirements. 6.6.1.2 Vessels shall be manufactured in accordance with the Company Technical Requirements and ASME Section VIII, Division 1, Pressure Vessel Code. Vessels shall be code stamped. 6.6.1.3 The pressure loss across the total dryer system, including prefilters, desiccant towers and dry air filters, shall not exceed 5 PSIG clean. 6.6.1.4 A dryer system shall ensure a minimum dew point depression of 50F below the minimum service conditions specified in the Technical Requirements. 6.6.1.5 The minimum design working pressure shall be 125 PSIG with a minimum design pressure of 150 PSIG. Design temperature shall be 200oF minimum. 6.6.2

Desiccant Towers

6.6.2.1 Each unit shall be provided with two (2) 100% vertical desiccant towers. The towers shall be of the "upflow" design. 6.6.2.2 The capacity of each tower shall be as specified. 6.6.2.3 Desiccant towers shall be packed with desiccant of the manufacturer's standard composition. 6.6.2.4 In addition to the initial fill of desiccant for the dryer towers, Contractor shall also supply desiccant for one complete fill of both towers. 6.6.2.5 Desiccant shall be supplied in sealed containers. 6.6.2.6 Towers shall be designed to allow change-out of the desiccant material with minimum effort and without shutting down the instrument air system.

Page 8 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE 6.6.3

Controls, Indicators and Alarms

6.6.3.1 The control system, including valves, timers, purge flow indicators, moisture indictor, and changeover failure alarm shall be incorporated into the compressor package control panel. 6.6.3.2 Differential pressure indicators shall be provided on prefilters, the desiccant towers, and the dry air filters. 6.6.3.3 The pressure and temperature indicators shall be locally mounted on the desiccant towers. 6.6.3.4 Electrical components shall be suitable for operation in the specified hazardous area. 6.6.4

Prefilter System

6.6.4.1 The prefilter system shall consist of two parallel full-flow filters utilizing oil vapor absorbing elements. 6.6.4.2 The prefilter system shall be fitted with associated changeover valving, an automatic drain, and a differential pressure indicator. 6.6.4.3 The prefilter system shall prevent the carryover of oil and other contaminants to the desiccant. 6.6.5

Dry Air Filter System

6.6.5.1 A dry air filter system similar to the prefilter system shall be installed downstream of the dryers and upstream of the air receiver inlet. 6.6.5.2 The dry air filter system shall be designed for full-flow, duplex operation. The filter system shall remove 99.9% of all particles 5 microns and larger to prevent desiccant carryover into the receiver. 6.7

Heat Exchangers

6.7.1

Finned-tube, air-cooled heat exchangers, directly driven by the compressor driver shall be provided within the package for air compressor interstage and discharge cooling.

6.7.2

Heat exchangers shall be fitted with automatic condenser traps.

6.7.3

Heat exchangers shall be sized to cool the discharge air to within 20F of ambient temperature. Heat exchangers shall be in accordance with the minimum requirements of TEMA Class C heat exchangers.

6.7.4

Page 9 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE 7.0

EQUIPMENT REQUIREMENTS

7.1

General

7.1.1

All interconnecting piping and fittings shall be installed within the limits of the packaged skid.

7.1.2

Piping shall be flexible and easily accessible.

7.1.3

Piping and tubing shall be firmly fixed in a neat and orderly arrangement.

7.1.4

Interconnecting piping and fixtures shall be prefabricated permanently mounted prior to testing and acceptance.

7.1.5

Pipe supports shall be designed to provide maximum protection against damage from vibration and operation and maintenance activities.

7.2

Carbon Steel Piping

7.2.1

Unless otherwise specified, carbon steel piping shall be in accordance with ASTM A106, Specification for Seamless Carbon Steel Pipe for High-Temperature Service.

7.2.2

Pipe sizes 1-1/2 inch and smaller shall be schedule 80. The piping may be flanged, welded, or screwed.

7.2.3

Pipe sizes 2 inches and larger as a minimum shall be schedule 40. With the exception of water piping and atmospheric vents, piping 2 inches and larger shall have welded or flanged connections.

7.3

Instrument Piping and Connections

7.3.1

Contractor shall provide all piping, tubing, valves and fittings required for instruments and instrument panels.

7.3.2

Instrument connections and test points shall be minimum of 1/2 inch size.

7.3.3

Pressure gauges and pressure switches shall be in accordance with the Technical Requirements.

7.3.4

Remote mounted pressure instruments that measure the same pressure may have common connections.

and

Page 10 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE 7.3.5

If instruments share a common connection, each instrument shall include a separate secondary 1/2-inch isolating valve.

7.3.6

All pneumatic tubing and/or controls shall be installed with 316 stainless steel tubing, fittings, and valves.

7.4

Connections

7.4.1

All piping runs shall contain sufficient union and flange connections to enable individual devices such as check valves to be removed for service. The union and flange connections shall be situated to ensure minimum disturbance of piping and equipment during service.

7.4.2

Compressor discharge piping shall be attached to the compressor with a flexible connection. The piping shall be terminated with a ground joint steel union.

7.4.3

All services shall terminate at the skid edge in a single connection. Flanges shall be provided for all connections unless specified otherwise. Connections shall be grouped in the same general area.

7.5

Threaded Connections

7.5.1

Threaded connections for oil and flammable services shall be seal welded with the following requirements:

7.5.2

Seal-welded connections shall be made without thread lubricants or compounds.

7.5.3

The seal weld shall consist of at least two passes. The throat of the finished weld shall be a maximum of 3/8 inch, and the throat shall cover all exposed threads.

7.5.4

No undercutting of threads is permitted.

7.6

Interconnections

7.6.1

The instrument air package shall be interconnected with the utility air package. The interconnection shall provide utility air as a back-up for the instrument air supply.

7.6.2

The tie-in point to the instrument air package shall be upstream of the prefilter system.

Page 11 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE 7.6.3

The prefilter system shall be guaranteed by Contractor to prevent oil or liquid carry-over from the utility air package. Additional liquid removal systems shall be installed, if necessary, to prevent carry over from the utility air package.

7.6.4

The prefilter system, and the additional liquid removal systems if provided, shall be within the instrument air package limits.

7.6.5

The utility air inlet connection shall terminate in a single flanged connection at the edge of the instrument air package.

7.7

Electrical

7.7.1

All wiring shall be in accordance with Company Technical Requirements.

7.7.2

Wiring shall be installed using Type MC cable in cable tray. Flexible conduit is acceptable only if required for belt tensioning adjustment or vibration isolation.

7.7.3

All electrical wiring shall be complete prior to testing and delivery. Electrical connections for operation of the package shall consist of motor power and space heater cables, motor control cables, and control panel power input. If electrical power is required for the dryers, it shall be derived from the control panel power input. Motor starters and motor control relays shall be located in the MCC building, and will be provided by others.

7.7.4

All electrical wiring shall include reference tags at the connection to the electrical device and at the control panel or junction box. Motor power cables shall be connected directly to motors. Motor control cables and the control panel power cable shall terminate in a single interface junction box.

7.7.5

All electric motors shall comply with Company Technical Requirements.

7.8

Controls and Instrumentation

7.8.1

General

7.8.1.1 The package control system shall be electric. Provision shall be made for both automatic and local manual operation. 7.8.1.2 All components and installation shall be suitable for the area classification specified and shall comply with NEC Articles 500 and 501. 7.8.1.3 Controls and instrumentation shall conform to Company Technical Page 12 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE Requirements. 7.8.1.4 Controls and control panels shall be completely piped and wired, and shall only require connection to platform piping and wiring circuits. 7.8.2

Control Panels

7.8.2.1 A 316 stainless steel NEMA 4X instrument control panel shall be provided. 7.8.2.2 The control panel shall be designed in accordance with Company Technical Requirements. 7.8.2.3 The panel shall be located on the skid and mounted in such a way as to prevent damage from vibration. 7.8.2.4 If applicable, the panel shall be designed to close the main valve and vent the engine fuel gas manifold during a shutdown. 7.8.2.5 Shutdown of the unit shall occur within 5 seconds of initiation of a normal or fault shutdown. 7.8.2.6 The control panel shall be provided with the following for each compressor as a minimum:      

High discharge air temperature alarm and shutdown High pressure alarm Low oil pressure alarm and shutdown Vibration alarm and shutdown Common alarm for remote indication HAND/OFF/AUTO switch

7.8.2.7 Status indicator shall be provided to indicate the following as a minimum:       

Control power on - white lens Compressor A running - green lens Compressor B running - green lens Compressor A high discharge temperature - red lens Compressor B high discharge temperature - red lens Compressor A low oil level - red lens Compressor B low oil level - red lens

Page 13 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE    

Compressor A high pressure - red lens Compressor B high pressure - red lens Motor A trip - red lens Motor B trip - red lens

7.8.2.8 The control panel shall be provided with the following momentary pushbutton switches for control power as a minimum:  Malfunction reset  Lamp test 7.8.2.9 In the hand position, the driver shall run regardless of the status of control inputs. In the off position, the driver shall not run regardless of the status of control inputs. In the auto position, the driver shall run under the control of the package control panel. 7.8.2.10 Contractor shall use discrete relays or a Programmable Logic Controller (PLC) for control and shutdown logic functions. Where a PLC is provided, it shall comply with the Technical Requirements. 7.8.2.11 All alarms and shutdowns shall be annunciated locally on a first-out basis. A remote summary alarm output and a remote shutdown input shall be provided. All remote inputs and outputs shall be normally open contacts. 7.8.3

Compressor Control Sequence

7.8.3.1 The compressor control sequence shall have the following order: a. A 10-second time delay shall be provided when the compressor is started. The 10-second time delay shall allow sufficient time for the compressor drive motor to come up to full speed and shall allow sufficient time for the compressor frame end to be properly lubricated. The 10-second time delay shall precede loading the compressor. b. A 3-second time delay shall be provided to allow the various interlocks to reach the normal operating state. c. If the pressure in the air receiver tank falls to 110 PSIG, the lead compressor shall be brought on line and shall operate until pressure reaches 125 PSIG. At this point, the compressor shall be unloaded automatically by the constant speed control. The sequence shall be repeated when the pressure falls to 110 PSIG. d. If the pressure continues to drop to 100 PSIG, the standby compressor shall be brought on line and the two units shall operate together until 125 PSIG is reached. The standby compressor shall then be taken off line and the lead compressor shall be unloaded to Page 14 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE complete the start-stop sequence. e. If the lead compressor runs unloaded for 10 minutes, it shall be shutdown and not restarted until the pressure in the air receiver drops to 110 PSIG. 7.8.3.2 A means of alternating the lead and standby compressors shall be provided by a manual selector switch located on the front of the panel. 7.8.3.3 The control system shall provide the following compressor operations:  

Loading the compressor ON/OFF Continuous running with a pressure sensing device automatically loading and unloading the compressor

7.8.3.4 Pressure maintenance controls for electric-drive compressors shall include automatic start/stop and manual stop. 7.9

Skid

7.9.1

The complete package, including compressors, exhaust silencers, air inlet filters control panel, drivers, coolers, receivers, and controls shall be mounted on a rigid steel skid with all interconnecting piping and wiring, ready for operation.

7.9.2

The skid shall be fabricated in accordance with Company Technical Requirements.

7.9.3

Skid design shall permit single-point lift of the completed package. If required for a single-point lift, Contractor shall provide a spreader bar or lifting frame, complete with slings and shackles.

7.9.4

The skid shall be furnished with a drain pan to prevent contamination of the surrounding area. The drain pan shall be sloped and provided with a drain connection. The drain connection shall be suitable for easy cleanout and disposal of the collected fluids.

7.9.5

The areas of the skid not directly under equipment shall be covered with grating.

7.9.6

Excessive transmission of vibration to the deck structure shall be prevented by installing vibration isolators.

8.0

IDENTIFICATION AND MARKING

8.1

General

8.1.1

The instrument air system shall be provided with the identification and Page 15 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE marking requirements as required in the Technical Requirements with the following additional requirements: 8.1.2

Corrosion-resistant, stainless steel nameplates or tags shall be securely attached to all identifiable pieces of equipment.

8.1.3

All rotating equipment shall have arrows indicating the direction of rotation. Rotation arrows shall be cast into the equipment or stamped on stainless steel plates and mounted with stainless steel fasteners.

8.1.4

Major equipment such as the compressors shall be supplied with a permanently fixed, stainless steel nameplate indicating the following information as a minimum:       

8.1.5

Manufacturer Manufacturer's type Serial number Item or tag number Size Maximum allowable design conditions Horsepower or kilowatt rating

Nameplates on engine drivers shall include the following information as a minimum:        

Manufacturer Manufacturer's type Serial number Item or tag number Rated speeds Trip speeds Ambient ratings Horsepower rating

8.1.6

All instrumentation shall be provided with securely attached stainless steel tags. Each tag shall include the identification shown on Company's piping and instrumentation drawings.

8.1.7

Nameplates and tags shall be attached to equipment with stainless steel screws or rivets. Adhesive shall not be acceptable. Tags may be attached to items with stainless steel wire only if screws or rivets are impractical.

8.2

Safety

8.2.1

Sufficient instrumentation shall be provided for safe operation of the package. The instrumentation shall include an automatic shutdown Page 16 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE system. 8.2.2

Particular attention shall be given to ensure that all electrical equipment and installations are suitable for the specified area classifications.

8.2.3

Relief valves shall be provided in accordance with the Technical Requirements and API RP 520, Recommended Practice for the Design and Installation of Pressure Relieving Systems in Refineries, Part I Design, and Part II - Installation. Relief valves shall meet all federal, state, or local regulations of the platform site.

8.2.4

Relief valves shall be set to operate at no more than the maximum stated design pressure, but not less than 110 percent of the compressor discharge pressure.

8.2.5

Solid steel guards shall be provided to within 1/2 inch of stationary housings adjacent to all moving parts. Moving parts include such elements as drive belts, cooler fans, and extension shafts.

8.2.6

Screen, expanded metal, or plastic guards shall not be acceptable.

8.2.7

All exposed surfaces subject to temperatures in excess of 140F shall be provided with personnel protection insulation in accordance with the Technical Requirements. All insulation have physical properties suitable for extended service-life in the specified environment.

8.3

Bid Information The following information shall be provided with the Contractor's bid as a minimum:

8.3.1

Compressors The following specific information shall be supplied for compressors:        

Manufacturer's model and size Complete data sheets (including performance, construction, and test data) Plant and instrument air schematics Air temperature and pressure leaving the unit Construction materials Typical compressor performance curves Curves showing turndown capabilities Motor power requirements

Page 17 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE 8.3.2

Air Dryer The following specific information shall be supplied for the air dryer:

8.3.3

 Air temperature leaving the unit  Pressure drop across the unit  Utility requirements  Process guarantees  Regeneration cycle time and air consumption  Dew point at discharge pressure Air Filters The following specific information shall be supplied for air filters:    

Pressure drop across the filter when clean and loaded Maximum allowable differential pressure across the unit Maximum retention capability Number of cartridges

8.4

Documentation Requirements

8.4.1

Contractor shall provide documentation in accordance with the Technical Requirements.

8.4.2

Contractor shall provide a lubricant schedule to ensure maximum equipment service life. The lubricating schedule shall detail the location, type, and frequency of service requirements for each system.

9.0

QUALITY ASSURANCE PROVISIONS Quality assurance provisions shall comply with the Requirements, with the following additional requirements:

Technical

9.1

Tests

9.1.1

Package equipment performance shall be verified during testing.

9.1.2

All compressors and engines shall receive the Contractor's standard shop tests as a minimum.

9.1.3

Engines shall be factory tested and shall be run at rated speed and horsepower for not less than one hour.

9.1.4

During running tests, mechanical operation of all equipment shall be satisfactory. Proper operation of all speed governors, alarm and trip functions, and overspeed shutdown devices shall be verified. Page 18 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE 9.1.5

Skid-mounted packaged units shall receive a mechanical running test prior to shipment. The test shall prove mechanical operation of all auxiliary equipment, as well as the compressors and drivers.

9.2

Special Tests and Inspections

9.2.1

All pressure-containing components within the package shall be hydrostatically tested to 1.5 times maximum allowable working pressure, or in accordance with the applicable code, whichever is greater. Tests shall be maintained for a sufficient period of time to permit complete examination of parts under pressure. The minimum period shall be 30 minutes.

9.2.2

9.3

Quality Conformance Inspections

9.3.1

Contractor shall provide five days written notice to Company that the equipment is complete, clean, and ready for inspection.

9.3.2

A check shall be made to ensure that the structural members comply with the Technical Requirements.

9.3.3

Welds shall be examined by magnetic particle or other approved inspection methods.

9.3.4

Padeyes shall be checked as necessary for compliance with codes and standards.

9.3.5

The dimensions of all components shall be checked for compliance with the drawings and the Technical Requirements. Any components not within the tolerances shall be brought to the attention of Company.

9.3.6

Adequacy of equipment supports, including size and location, shall be verified.

Page 19 of 21

MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE APPENDIX I STANDARDS AND CODES 1.

INDUSTRY ASSOCIATIONS American National Standards Institute (ANSI) B16.5

Pipe Flanges and Flanged Fittings

American Petroleum Institute (API) RP 14F

Recommended Practice for Design and Installation of Electrical Systems for Offshore Production Platforms

RP 520, Part I

Recommended Practice for the Design and Installation of Pressure Relieving Systems in Refineries - Design

RP 520, Part II

Recommended Practice for the Design and Installation of Pressure Relieving Systems in Refineries - Installation

RP 550, Part I

Manual on Installation of Refinery Instruments and Control Systems - Process Instrumentation and Control

American Society for Testing and Materials (ASTM) A106

Specification for Seamless High-Temperature Service

Carbon Steel Pipe for

A307

Specification for Carbon Steel Externally Threaded Standard Fasteners

American Society of Mechanical Engineers (ASME) Section VIII, Div. 1

Pressure Vessel Code

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MAMTECH SERVICES LIMITED Specification 17.09 INSTRUMENT AIR PACKAGE APPENDIX I STANDARDS AND CODES - Continued

National Fire Protection Association (NFPA) 70

National Electrical Code

Tubular Exchanger Manufacturers Association (TEMA) Class C

2.

Heat Exchangers

GOVERNMENT AGENCIES United States Department of Labor - Occupational Safety and Health Administration (OSHA) 29 CFR 1910 General Industry OSHA Safety and Health Standards

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