Special Purpose Lube/Seal Oil Systems

IPE Engineering Practice IPE-EP-6-9-1

Document number: IPE-EP-6-9-1 · Section: 6 — Rotating Equipment

The following paragraph numbers refer to API 614, Third Edition, August 1992, which is part of this Engineering Practice.

INTRODUCTION

requirements for lubrication, shaft-sealing, and control-oil systems correspond to those of APl Standard 614, Third Edition, August 1992, with the specific options, deletions, additions, or modifications sanctioned in this Practice.

The paragraph numbers in this specification correspond to those used on APl 614. Paragraph numbers may not be consecutive and all APl 614 paragraphs not mentioned herein shall be considered to be verbatim requirements of this specification.

Instructions contained in this specification such as "add" or "substitute" shall be interpreted as follows: if information is "added" to an existing paragraph in the APl Standard, the requirements of this specification shall be read as a continuation of that particular APl paragraph. If information is "substituted", the affected APl requirement shall be replaced in its entirety by the requirements of this specification. If (New) is next to a paragraph number, not appearing in APl 614, it shall be read as an added requirement.

The Purchaser's requirements for all paragraphs in APl 614 which require a Purchaser's decision (bulleted paragraphs) are indicated on the data sheets or in this specification. If not addressed in the inquiry, the proposal shall clearly state the basis included in the pricing furnished.

NOTE: U.S. Customary units shall be regarded as standard. SI (metric) units in APl 614 and this supplement are included for convenience reference only and shall not be interpreted as precise conversions.

Table 1 records the vendor drawing and data requirements.

GENERAL

Scope

1.1.1 (Substitute) This Practice, together with the requisition, data sheets, and all attachments thereto, are the minimum requirements for oil systems.

(New) The vendor shall quote in strict accordance with the bid inquiry. Alternative bids are acceptable; however, deviations must be completely documented in accordance with the procedures given in EP 1-1-3.

A revision bar indicates all changes made to this Revision.

Alternative Designs

1.2.1 (Add) Metric fasteners and flanges constitute alternative design features and must be cited as exceptions in the vendor proposal.

Conflicting Requirements

(Substitute) In case of conflict among the various documents, their order of precedence is generally as follows:

Purchase Order Data Sheets

Project Specification(s) Referenced Industry Standards

(New) All conflicting requirements shall be referred to the Purchaser in writing prior to issuance of the purchase orders. The Purchaser will issue confirming documentation if needed for clarification.

(New) Mandatory requirements cannot be superseded by any of the foregoing, and compliance therewith will be the joint responsibility of the Purchaser and the Vendor. Mandatory requirements include all codes, regulations, ordinances, and statutes of all municipal, state and national bodies having jurisdiction in the locations where the equipment is to be installed. It shall be the vendor's responsibility for discernment and compliance with those mandatory requirements.

Referenced Publications

(Substitute) This paragraph of API 614 does not apply to this specification (See 1.3.3 above).

(New) The referenced Engineering Practices, and any other attached to the requisition shall apply to the extent referenced herein or on the data sheets.

STANDARDS AND PUBLICATIONS

Engineering Practices
EP 1-1-3 Deviations to Engineering Practices EP 6-3-1 General Purpose Steam Turbines EP 6-7-1 Special Requirements for Rotating Equipment EP 6-8-1 Field Storage and Installation of Rotating Equipment EP 12-1-1 Control Systems EP 12-2-1 Control Systems Installations EP 13-3-1 Induction Motors 500 HP and Below

BASIC DESIGN

General

 (Revise) Unless otherwise specified, separate lube and seal oil systems shall be provided.

(Revise the first sentence to read) When oil is supplied from a common system to two or more machines (such as compressor, a gear, or a motor), the vendor having unit responsibility shall specify the oil's characteristics on the data sheet.

2.1.10 (Add) Piping, filters, and reservoirs shall be grounded to prevent static electrical charge build up as necessary.

(Add) The unit shall be supplied in accordance with EP 6-7-1 and conditions as defined on the data sheets.

(Add) All valves, controls, pressure reducers, thermometers, pressure gauges, alarms, alarm switches and other instruments shall be mounted on the baseplate and shall be visible from the periphery and readily accessible for operation and maintenance.

2.1.16 (Add) Crossover piping and valves shall be furnished between dual equipment items, such as filters and coolers, to permit filling idle equipment from the active equipment. In addition, valved drain connections and all necessary piping shall be furnished for all equipment. As a minimum, valved vent and drain connections shall be provided for oil filters and for oil coolers (including the water side of coolers).

2.1.18 (Revise) Omit the bullet and the phrase "if specified by the purchaser".

2.1.20 (Add) The vendor shall furnish a rundown tank properly designed to provide a fully lubricated coast-down of the equipment train upon loss of pressurized lubrication. Continuous oil through-flow is required so as to avoid the oil being in the stagnant (quiescent) state for extended periods prior to "running down" during an emergency event.

2.1.24 (New) The unit shall be designed and constructed to provide adequate clearance for maintenance and operational concerns, e.g., clearance to turn valves, read gauges, service filters, remove bundles. In addition, pumps and drivers shall be removable while the unit is in service.

2.2 Baseplates

2.2.4 (Substitute) All walk and work areas shall have a non-skid surface. In areas that are expected to be continually oily or wet, hot dipped galvanized steel grating or expanded metal mesh shall be securely attached to provide safe footing for personnel (Checker or diamond plate is not acceptable as "non-skid"). Walk and working areas shall be free of tripping hazards. Where walking surfaces are located, boltheads shall be counter-sunk.

2.3 Oil Reservoirs

2.3.1 (Add) Pumps, coolers, filters, etc. shall not be mounted on top of the reservoir.

(Add) The vendor shall take any and all precautions necessary to prevent the build up of static electricity.

(Revise the second sentence to read) The flanged drain connection shall be at least 3 inches in size, with a valve and blind flange.

(Add) The oil reservoir shall be per Figure A-22. Two tapped grounding pads shall be provided. Other options will be per the data sheet. If the Purchaser opts for steam heating beneath sloped reservoir bottom, the heated space must be filled with heat transfer oil and a vented standpipe must be provided as well. The standpipe volume shall fully accommodate thermal expansion volume changes. Diaphragm-type manual charge accumulators, equipped with instantaneous visual indication of fill proportion N2/Oil are recommended.

2.3.5.c (Add) The gauge shall be valved and flanged to allow for removal and maintenance during operation.

2.4 Pumps and Drivers

2.4.1 (Purchaser's Decision) The pumps shall be horizontal.

(Substitution) Pumps shall be positive displacement type and shall conform to APl Standard 676 except as modified in this Practice.

(Add) Motors shall comply with EP 13-3-1.

(Add) Steam turbines shall comply with EP 6-3-1. The pump shall be capable of operating up to the overspeed trip setpoint. Steam turbines shall be equipped with removable blanket type insulation.

2.4.10 (Add) If parallel pressure regulators and/or pressure relief valves are supplied for the discharge lines of positive displacement pumps, the valves shall be located upstream of the discharge check valve.

(Revise) Omit the bullet and the phrase "when specified by the Purchaser".

(Purchaser's Decision) The preferred coupling is of the non-lubricated design with flexible, stainless steel disks and a five inch long captured spacer (Rexnord Series 71 or equal).

 (Addition) The selection of the type of primary and spare pump driver shall be by the purchaser.

(New) Each pump discharge shall include a bypass valve for start up purposes as shown in Figure A-20, option A-20b and per Figure A-21, option A-21e.

2.5 Coolers

2.5.1 (Add) Coolers shall be upstream of filters.

2.5.3 (Revise) The minimum tube wall thickness shall be 16 BWG.

(Revise first sentence to read) Regulation of oil supply temperature shall be accomplished by an oil bypass line around the cooler; in no case, however, shall the oil bypass the filter.

(Revise) Omit the bullet and the phrase "When specified by the Purchaser".

2.5.9 (New) A sampling point shall be provided immediately downstream of the bearing housings and the filters to allow representative samples of the circulating oil to be obtained.

Filters

(Revise first sentence to read) Twin full-flow filters with replaceable elements or cartridges with filtration of 5 microns nominal or finer shall be supplied.

(Add) Single element filter cartridges shall be used.

2.6.5 (Add) A local differential pressure indicator shall be installed to measure filter differential pressure.

(New) Filter cases and heads shall be of steel. Filter internal hardware shall be of stainless steel.

(New) 100% spare oil filter elements shall be furnished with the oil system so that the filter elements used during the field flushing operations can be replaced with clean elements prior to startup.

Transfer Valves

(Substitute) The transfer valve shall have tight shutoff provisions for the maintenance of coolers and filters. Spectacle blinds shall be provided.

(New) Continuous flow transfer valves shall be Haywood or Andale.

2.13 Piping

2.13.1 (Add) The system arrangement and orientation/location of the Purchaser's connections shall be mutually agreed upon prior to system fabrication.

2.13.3  (Add) A minimum of five (5) percent radiography of piping welds in pressurized oil piping shall be conducted, including a minimum of one weld in each service at locations subject to Purchaser's approval.

2.13.5.f (New) Provisions for adequate clearance for the addition of insulation where required.

2.13.7 (Purchaser's Option) In seal oil systems, double block valves shall be provided for all vents and drains used in hydrogen or toxic service.

2.13.9 (Add) All instrument interconnecting tubing shall be 1/2 inch OD (0.065 inch minimum wall thickness) annealed, Type 316 seamless stainless steel per ASTM A269. Tubing fittings shall be of Type 316 stainless steel, Swagelok manufactured.

2.13.9.3 (Purchaser's Option) All 3/4 inch and 1 inch tubing fittings shall be 316 stainless steel, Crawford Swagelok type.

2.13.10.3 (Purchaser's Option) Carbon steel slip-on flanges are not allowed. Stainless steel weld neck flanges shall be used. Van stone or lap joint flanges are not acceptable.

2.13.11.4 (Add) Dead end stubs on lube oil pipe downstream of the filters are not permitted.

2.13.12  (Add) Provisions for ferrographic sampling shall be made if specified on the data sheets by the Purchaser.

Tube fittings shall be of stainless steel as manufactured by Crawford Swagelok. 1/4 inch plastic coated copper tubing may be used for pneumatic transmission.

(Add) Pressure regulating valves shall be located downstream of the coolers, before the filters.

INSTRUMENTATION, CONTROL AND ELECTRICAL SYSTEMS

General

3.1.2 (Add) All instruments shall be permanently tagged with item number and service. Instrumentation and installation shall comply with EP 12-1-1 and EP 12-2-1.

3.1.5 (Add) Piping, tubing and conduits shall be arranged to provide adequate clearance for the addition of insulation.

(Add) Full relief shall be provided. Relief valves shall be Ful-flo pilot type.

(New) Teflon tape shall not be used; however, teflon paste compounds are acceptable.

(New) Individual tubes or groups of individual tubes shall be continuously supported in conduit or angle iron. Wiring or attaching to a pipe is NOT acceptable. Angle iron must NOT be attached to a control valve diaphragm by means of the diaphragm bolt.

(New) All control valves shall be flanged. They shall be provided with isolating valves, bypass valves, and 3/4 inch NPS bleed valves.

(New) All thermometers and pressure gauges shall be calibrated prior to the hydrostatic and operational tests and stamped with calibration certification stickers.

(New) Both electric and steam oil heaters shall have thermostats set to limit the oil temperature to 120 oF or less.

3.3 Alarms and Shutdowns

3.3.1 (Add) Shutdowns shall only initiate from the concurrent action of at least 2 of 3 sensors (i.e. voting-logic).

3.3.5 Shutdown switches shall open (de-energize) to trip.

3.4 Instrumentation

3.4.1 Thermometers

3.4.1.1 (Purchaser's Decision) Dial thermometers shall be bimetallic with a 5 inch adjustable angle dial face and stainless steel case. Thermowells shall have 1 inch male NPT threads. Wells on insulated lines and vessels shall have a 2-1/2 inch extension neck.

Pressure Gauges

(Add) The pressure gauge on the discharge of all pumps shall be visible from the discharge block valve.

(Modify) All pressure gauge shall be of the safety front type. Safety blowout disks shall be provided on all pressure gauges, including receiver gauges. Case material shall be cast iron or aluminum with threaded covers.

All pressure gauges shall be 4-1/2 inch in diameter with 1/2 inch NPT connections. All receiver gauges shall be 6 inches in diameter with 1/4 inch connections. Accuracy of all process gauges shall be guaranteed at a minimum of 1/2 of 1% of maximum scale reading over the entire scale. Dials shall be white with black figures.

(New) All process pressure connections shall be 3/4 inch minimum with at least a 3/4 inch block valve.

(New) Orifices shall be provided in the instrument piping to protect the pressure gauges from sudden pressure surges, e.g., a spare pump startup. All orifice unions and restrictive orifice plates shall be permanently identified or stamped with their size and part number.

INSPECTION AND TESTING

General

4.1.3 (Add) "Sufficient advance notification" shall be five working days in writing.

Inspection

4.2.1.5  (New) Prior to hydrostatic and operational tests, coupling alignment, piping strain and equipment soft foot shall be checked (on oil pumps) in accordance with the requirements specified in EP 6-8-1. The inspection shall be witnessed by the Purchaser's inspector. The vendor shall make the necessary corrections to meet the allowable limits specified in EP 6-8- 1.

4.4	Preparation for Shipment
4.4.1	(Add) The oil system shall be prepared for shipment in accordance with EP 6-7-1. The system shall be suitable for outdoor storage at the job site for at least six months or a mutually agreed period.
5.0	VENDOR'S DATA
5.2	Contract Data
5.2.3	Drawings
5.2.3.1	(Add) The Owner's name and item (tag) number shall be included on the drawings.
5.2.3.7	(Revise) Omit both occurrences of the phrase "if specified by the purchaser."
5.2.4	Data
5.2.4.2.e	(Revise) Omit the bullet and the phrase "when specified by the Purchaser."
5.2.4.2.f	(New) Calibration certificates for all instruments used during testing of the system.
5.2.5	Progress Reports

Omit the bullet and the words "when specified".

6.0 TABLES

TABLE 1 DOCUMENTATION REQUIREMENTS FOR SPECIAL PURPOSE LUBE/SEAL OIL SYSTEMS PER EP 6-9-1

Item	Description	Format (1)	As-Built
1	Certified dimensional outline drawing and list of connections	See EP 2-5-2	Yes
2	Cross-sectional drawings and bill of materials	See EP 2-5-2	Yes
3	Seal-oil schematic and bill of materials, including component sizing criteria	See EP 2-5-2	Yes
4	Seal-oil arrangement drawing and list of connections	See EP 2-5-2	Yes
5	Seal-oil component drawings and data	See EP 2-5-2	Yes
6	Lube-oil schematic and bill of materials, including component sizing criteria	See EP 2-5-2	Yes
7	Lube-oil arrangement drawing and list of connections	See EP 2-5-2	Yes
8	Lube-oil component drawings and data	See EP 2-5-2	Yes
9	Electrical and instrumentation schematics and bill of materials	See EP 2-5-2	Yes
10	Electrical and instrumentation arrangement drawing and list of connections	See EP 2-5-2	Yes
11	Console test agenda	See EP 2-5-2	Yes
12	Weld procedures	See EP 2-5-2	Yes
13	Hydrostatic test logs	See EP 2-5-2	Yes
14	Operational test logs	See EP 2-5-2	Yes
15	As-built data sheets	See EP 2-5-2	Yes
16	Operating and maintenance manuals	See EP 2-5-2	Yes
17	Spare parts recommendation and price list	See EP 2-5-2	Yes

NOTE:

(1) If the document cannot be provided in the format as indicated, the Manufacturer shall consult with the Owner's Engineer for an acceptable alternative.

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