Duplex_Strainers_Appendix_F_-_Spec_8038_0003.docx
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- Duplex Strainers Federal contract opportunity
- Solicitation number
- N65540-15-T-5418
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Appendix F (Specs)
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Other files for this federal contract opportunity
| File | Type | Posted |
|---|---|---|
| N65540-15-T-5418-0001.pdf | ||
| Duplex_Strainers_Q A.docx | DOCX document | |
| Approx._Duplex_Strainer_Inlet_ _Outlet_Dimensions.docx | DOCX document | |
| N65540-15-T-5418_Redacted.pdf | ||
| SOW_-_Duplex_Strainers_(17_Aug_2015).docx | DOCX document | |
| Duplex_Strainers_Appendix_C_-_Spec_8035_0002.docx | DOCX document | |
| Duplex_Strainers_Appendix_D_-_Spec_8036_0003.docx | DOCX document | |
| Duplex_Strainers_Appendix_E_-_Spec_8037_0003.docx | DOCX document | |
| CDRLS DUPLEX_STRAINERS_1.PDF | ||
| Duplex_Strainers-Appendix_A.xlsx | XLSX spreadsheet |
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NSWCCD-SSES Lubricating Oil System Duplex Strainer Technical Specification Appendix F – UID 8038_0003 Date: June 2015
| LUBRICATING OIL SYSTEM DUPLEX STRAINER TECHNICAL SPECIFICATION DOCUMENT Naval Surface Warfare Center - Philadelphia |
| Appendix F |
June 2015
Table of Contents
| 1 | Scope of this Specification | 3 |
| 2 | Equipment Overview | 3 |
| 3 | Applicable Codes, Standards, and Regulations | 3 |
| 4 | Rating, Conditions of Service, and Performance Warranty | 4 |
| 4.1 | Equipment Ratings, Materials, and Workmanship | 4 |
| 4.2 | Conditions of Service | 4 |
| 4.3 | Acceptance, Performance Warranty and Defects Liability | 4 |
| 5 | Performance Requirements | 5 |
| 6 | Inspections and Tests | 8 |
List of Tables
| Table 1: Duplex Strainer Technical Requirements | 6 |
| Table 2: Required Equipment Inspections and Tests | 9 |
Scope of this Specification A. This specification provides the technical requirements for the design, performance, construction, inspection, testing, and warranty of one (1) duplex strainer to support the facility lubricating oil system.
B. This specification is broken down into the following sections:
1. Scope of this Specification
2. Equipment Overview
3. Applicable Codes, Standards, and Regulations
4. Rating, Conditions of Service, and Performance Warranty
5. Performance Requirements
6. Inspections and Tests C. Throughout this specification the following terms apply:
1. “Seller” refers to the Original Equipment Manufacturer (OEM) / Equipment Provider.
2. “Buyer” refers to NSWCCD-SSES.
3. “Manufacturer” refers to the party or parties that manufacture a part or parts of the equipment or material.
Equipment Overview A. The duplex strainer will be installed and operated indoors on the Government provided site in Building 633 at the Naval Surface Warfare Center, Carderock Division, Ship Systems Engineering Station (NSWCCD-SSES), Philadelphia, PA. The duplex strainer will be installed in the facility lubricating oil system. To mitigate any potential contamination of the system end users, a suitably sized full-flow duplex strainer will be installed upstream of the system plate heat exchanger.
B. The duplex strainer will be capable of supplying full flow during cross over to facility equipment operation during changes between filter sides.
C. The duplex strainer will be rated to 25 microns absolute and have an internal magnet installed to collect any ferrous wear products from the system tanks and components that might occur. The function of the duplex strainer is to provide continuous removal of solid contaminants from the oil prior to distribution.
Applicable Codes, Standards, and Regulations A. The equipment shall be in compliance with the latest applicable regulations of applicable industry standards such as the American Society of Mechanical Engineers (ASME), the American Society for Testing and Materials (ASTM), and the American Welding Society (AWS).
B. ASME Standards
ASME Section VIII, Div 1, Design and Fabrication of Pressure Vessels ASME B16.5, Pipe Flanges and Flanged Fittings
C. ASTM Standards
ASTM A182, Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service ASTM A312, Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes ASTM A403, Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
D. Military Standards
MIL-PRF-17331, Lubrication Oil Specification 2190-TEP
E. AWS Codes
AWS D1.1, Structural Welding Code - Steel Rating, Conditions of Service, and Performance Warranty Equipment Ratings, Materials, and Workmanship A. The equipment provided shall meet the performance data provided in the performance requirements section of this specification (Section 5).
B. Materials used for work performed under this contract shall be new, of the highest quality, and suitable for the intended service conditions of the equipment.
C. Work shall be performed by skilled mechanics in the various crafts and be executed in a first class and workmanlike manner in accordance with recognized good practice in the industry.
Conditions of Service A. The equipment will be located indoors in a non-climate controlled space and shall be designed for, and be protected against, these prevailing conditions as well as those identified in this specification.
Acceptance, Performance Warranty and Defects Liability A. Acceptance of the equipment by the Buyer shall follow the successful completion of all tests identified in Section 6 of this specification, including the review and approval of all test reports by the Buyer supplied Certification upon successful completion of all Tests.
B. The Seller shall warrant that the equipment supplied shall be entirely suitable for the intended service and is free from faults in design, and is of sufficient capability to meet the specified performance requirements in Section 5 of this specification.
C. The Seller shall warrant the equipment for a period of at least twelve (12) months from the date of delivery. This shall warrant all equipment furnished by the Seller against defects in design, material, and workmanship.
Performance Requirements A. General Construction:
· The strainer shall be of the duplex basket type with valves and constructed to be readily opened for examination, removal, and cleaning of the baskets. The strainer shall be provided with shifting means to permit changeover (the act of shifting flow from strainer basket to the other) without damage to any parts or disruption of normal system operation for basket removal / cleaning. The strainer compartment shall have a set of vent and drain valves. A changeover mechanism and an equalizing feature shall be included in the design.
B. Basket Design:
· Material Construction: baskets shall be of pleated or similar construction which will result in a large surface area per unit of volume. Strainer baskets shall prevent passage of particulate matter larger than the size specified in Table 2 below (smallest cross section). The supporting framework (strength member) shall be either plate or wire construction, with a flange for supporting the frames on a machined surface in the strainer body. A seal shall be provided between the strainer element lands to prevent by-passing of contaminants. The basket elements shall be held securely in place when the strainer is assembled. Baskets shall not rupture when totally clogged. Materials shall be corrosion resistant; and shall meet the performance requirements of this specification. Flow through the basket shall be inside-out. Strainer baskets shall be of a commonly available commercial type.
· Magnet: Strainer baskets shall be equipped with magnets, which shall be secured to a tube with a guide rod in the center of each basket. The magnet element shall be withdrawn with the basket and shall be readily detachable for cleaning or replacement without damage to the wire mesh screens. The magnets shall have rounded ends. The magnets and magnet assembly shall be installed to prevent the magnets or magnet assembly from coming into contact with the strainer basket should any unlocked screwed connection become unscrewed in service.
C. Safety Interlocks:
· Positive interlocks shall be provided to prevent the following operator actions:
· Changeover to an off-duty compartment when the off-duty compartment cover is off or when the drain and equalizing valves are open
· Remove or loosen the cover when the compartment is pressurized
· Open the drain valve on the compartment in service
D. Anti-spray Feature:
· Compartment covers shall deflect fluid spray downward into a drip pan in the event of gasket failure. Where such spray would flow along a horizontal surface of the strainer body, a means shall be provided adjacent to the cover to direct the flow from the horizontal surface downward into the drip pan. The spray deflector shall remain in position at all times when the compartment is pressurized
E. The following technical requirements shall be satisfied by the provided duplex strainer:
Table 1: Duplex Strainer Technical Requirements
| Design Requirement |
| Description |
| Duplex Strainer |
| Notes / Technical Rationale |
| Qty Required |
| One (1) strainer |
| Fluid Type |
| MIL-TEP-2190 Lubricating Oil |
| System fluid |
| Inlet / Outlet Pipe Nominal Size and SCH |
| 6” NPS, SCH 40 |
| Compatibility with system inlet / outlet pipe size connections |
| Strainer Type |
| Duplex: 2 independent baskets – 25 micron absolute |
| Strainer type will allow continuous system operation |
| Specifications |
| Strainer and Header Bodies in accordance with ASME Section VIII, Div 1 |
| Standard ASME specifications for strainer design |
Design Flow Rate
| 690 gpm |
| System normal flow rate with one (1) pump operating at “high” speed |
| Normal System Flow Rates |
| 350 gpm or 690 gpm |
| System normal flow rates with one (1) pump operating at “low” or “high” speed |
| Abnormal System Flow Rate |
| 1,380 gpm |
| The duplex strainer shall be capable of withstanding the full flow rate of two (2) pumps (“high” speed) for a brief duration with fouled strainer baskets at 90°F lubricating oil without being damaged |
| Maximum Pressure Drop at Design Flow, Clean Basket, Lube Oil Service |
| 1.5 psid at 690 gpm |
| Maximum Pressure Drop at Design Flow, 80% Blockage, Lube Oil Service |
| 12 psid at 690 gpm |
| End Connections (Sizes and Types) |
| 6” 150# RF ASME B16.5, inlet/outlet |
| Ensure compatibility with system flanges |
| End Connection Configuration |
| Offset or Inline |
| Hydrostatic Test Pressure |
| 225 psig |
| System hydrostatic test pressure |
| MAWP |
| 150 psig |
| System design pressure |
| Design Temperature |
| 200°F |
| System design temperature |
| Working Temperature |
| 90-180°F |
| Based on normal expected system temperatures |
| Body and Cover Material |
| Stainless Steel 304 or 316 |
| Ensure compatibility with system materials |
| Basket Material |
| Stainless Steel 304 or 316 |
| Ensure compatibility with system materials |
| Trim Material |
| Stainless Steel 304 or 316 |
| Ensure compatibility with system materials |
| Shutoff Valves/Equalizing Valves – Material and Type |
| Stainless Steel Butterfly or Ball Valves (if available) |
| Ensure compatibility with system materials |
| Fastener Materials |
| Stainless Steel 304 or 316 |
| Ensure compatibility with system materials |
| Perforation Sizes |
| Based on 25 micron absolute rating |
| System filtration requirement |
| Minimum Open Area Ratio (OAR) |
| 4:1 (min) |
| 4:1 OAR (min) is required to reduce the time the strainer will operate without cleaning even when clogged |
| Drains |
| ¼”, ½”, or ¾” NPT drain connections (qty 2) located at basket housing bottom to fully drain strainer |
| Required to drain strainer |
| Vents |
| ¼”, ½”, or ¾” NPT vent connections (qty 2) located on basket covers to fully vent strainer – globe valves shall be installed |
| Required to vent strainer |
| Maximum Flange-to-Flange Dimension |
| 32” (max) |
| Maximum Basket Removal Height |
| 60” (max) as measured from base of strainer to the top of strainer basket in the removed position |
| Cover Design |
| Quick open covers are required: T-bolt hinged covers, davit assembly covers, yoke hinged covers, or quick opening covers shall be installed; the covers shall effect a positive seal on a gasket or o-ring recessed in the body |
| Ensure easy accessibility of the strainer baskets for cleaning / removal |
| Header Design |
| Welded headers in accordance with ASME Section VIII, Div 1 |
| Additional Options (NOT REQUIRED BUT CAN BE PROVIDED BY SELLER IF AVAILABLE) |
| DP Gauge, DP switch, internal magnet for ferrous material removal, gauge connections, and valves (if available) |
| DP Gauge will facilitate local monitoring of the DP across strainer and initiate cleaning process if required |
Inspections and Tests A. Final inspection and hydrostatic testing of the equipment shall be performed by the Seller or Manufacturer as follows:
Table 2: Required Equipment Inspections and Tests
| A. General |
| The duplex strainer shall be subjected to the following tests by the Seller or Manufacturer. The Seller or Manufacturer shall have a documented program for the application, calibration, and maintenance of gages and instruments used during these tests. |
| B. Quality Assurance |
| Quality Assurance shall be based on the requirements of ASME Boiler and Pressure Vessel Code, Section VIII, Division 1. |
| C. Hydrostatic Testing |
| The completely assembled strainer shall be tested by the Seller or Manufacturer to a pressure equal to 150% of the design pressure (150 psi) for a duration of 60 minutes. A strainer not maintaining zero leakage shall be rejected. The testing medium shall be water. |
| D. Tightness Tests (Leakage) |
| The strainer shall be tested by the Seller or Manufacturer for a duration of 30 minutes to verify the seal tightness of each changeover valve at 100% of design pressure (150 psi) using lubricating oil having a density of 60 lb/ft3 maximum (corresponding to the lowest density lubricating oil expected) as the test medium. A strainer not maintaining zero leakage shall be rejected. The observation of wetting at the fluid boundary formed by the seal does not constitute leakage. To be called leakage, the fluid must form drops that become large enough to drop or flow away from the point of formation and into the basket compartment. |
| E. Visual and Dimensional Inspection |
| The strainer shall be visually and dimensionally examined by the Seller or Manufacturer to verify conformance to the requirements of this specification and the drawing. A strainer having one (1) or more defects shall be rejected. |
| F. Operating Test |
| The strainer shall be tested by the Seller or Manufacturer for pressure drop (clean) across the strainer at the specified design flow capacity and pressure using lubricating oil having a viscosity of 175 SSU (maximum) as the test medium. A strainer exceeding the specified clean pressure drop at design flow capacity shall be rejected. |
| G. Non-destructive |
| The strainer and its components shall have welds and casting surfaces inspected by the Seller or Manufacturer in accordance with AWS D1.1 or equal. Welds or castings not in accordance with AWS D1.1 or equal shall be rejected. |
| H. Verification of Safety Interlock Effectiveness |
| The Seller or Manufacturer shall demonstrate that the actions prohibited in Section 5.C are positively prevented by the interlocks. A strainer permitting the actions in Section 5.C shall be rejected. |
| I. Final Inspection |
| The Seller or Manufacturer shall perform a post fabrication inspection to confirm that the equipment is in conformance to this specification, conformance to the final outline and detail drawings, and the equipment suitable for service including identification of missing or loose hardware and proper mechanical fit up. |
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