1、*USACE / NAVFAC / AFCESA / NASA UFGS-33 01 50.01 (February 2010)-Preparing Activity: USACEUNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated April 2010*SECTION TABLE OF CONTENTSDIVISION 33 - UTILITIESSECTION 33 01 50.01CLEANING FUEL STORAGE TANKS02/10PART 1 GENERAL1.1
2、 SUMMARY1.1.1 Government Furnished Services1.1.1.1 Fuel Removal1.1.1.2 Utilities1.1.2 Electrical Equipment Approval1.1.3 Tank Entry Equipment1.1.3.1 Air Movers1.1.3.2 Combustible Gas Indicator1.1.3.3 Lights1.1.3.4 Miscellaneous Supplies1.2 REFERENCES1.3 SUBMITTALS1.4 QUALITY ASSURANCE1.4.1 Qualifica
3、tion1.4.2 StatementPART 2 PRODUCTSPART 3 EXECUTION3.1 EXAMINATION3.2 PREPARATION3.2.1 Precautions3.2.1.1 Tank Environment3.2.1.2 Tank Entry Permission3.2.1.3 Physical Contact3.2.2 Tank Ventilation3.2.2.1 Air Movers3.2.2.2 Precautions3.2.3 Tank Preparation for Cleaning3.2.3.1 Blind Flanges3.2.3.2 Tan
4、k Survey3.2.3.3 Equipment Placement3.2.3.4 Contractor ResponsibilitySECTION 33 01 50.01 Page 1Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.2.3.5 Lighting3.3 APPLICATION3.3.1 Cleaning3.3.2 Floor Drying3.3.3 Potential Explosive Vapors3.4 CLEANUP A
5、ND ACCEPTANCE3.4.1 Water Usage And Disposal3.4.2 Reinstallation3.5 STENCILING TANK- End of Section Table of Contents -SECTION 33 01 50.01 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-*USACE / NAVFAC / AFCESA / NASA UFGS-33 01 50.01 (February
6、 2010)-Preparing Activity: USACEUNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated April 2010*SECTION 33 01 50.01CLEANING FUEL STORAGE TANKS02/10*NOTE: This guide specification covers the requirements for cleaning tanks whenever a new Jet Fuel Piping system is flushed
7、 or when modifying an existing jet fuel storage tank. This specification section shall be used whenever a new jet fuel piping system is flushed or when modifying an existing jet fuel storage tank. DoD Type III systems shall conform to Standard Design 078-24-28 PRESSURIZED HYDRANT FUELING SYSTEM (TYP
8、E III). DoD Type IV/V systems shall conform to Standard Design 078-24-29 AIRCRAFT DIRECT FUELING SYSTEM (TYPE IV) DESIGN. Edit this guide specification for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicable items(s) or insert appropriate infor
9、mation.Remove information and requirements not required in respective project, whether or not brackets are present.Comments and suggestion on this specification are welcome and should be directed to the technical proponent of the specification. A listing of the technical proponents, including their
10、organization designation and telephone number, is on the Internet.*PART 1 GENERAL1.1 SUMMARY1.1.1 Government Furnished Services 1.1.1.1 Fuel RemovalThe base fuel officer will remove the fuel within 450 mm 18 inches of the bottom with the fixed pumping system. Remove the remaining fuel by pumping int
11、o a Government tank truck. Any fuel remaining in the tank, after the tank has been released to the Contractor, is considered contaminated and shall bedisposed of by the Contractor. Remove the contaminated fuel from SECTION 33 01 50.01 Page 3Provided by IHSNot for ResaleNo reproduction or networking
12、permitted without license from IHS-,-,-the base and dispose of it in a manner consistent with applicable pollution control regulations, and all Host Nation local, state, and federal EPA regulations.1.1.1.2 UtilitiesWater and electricity will be made available to the Contractor as described in Sectio
13、n 00 73 00 SPECIAL CONTRACT REQUIREMENTS 01 50 00 TEMPORARY CONSTRUCTION FACILITIES AND CONTROLS.1.1.2 Electrical Equipment Approval All electrical equipment and conductors used by the Contractor within 15 m 50 feet of any fuel pipes or storage tanks shall be approved for use in Class 1, Division 1,
14、 Group C, hazardous areas.1.1.3 Tank Entry EquipmentThe Contractor shall furnish all necessary clothing and equipment required for the work and protection of personnel, regardless of whether they enter a tank or handle materials outside the tank. Before any tank cleaning work is performed, the Contr
15、actors equipment will be inspected and approved at the job site, by the Contracting Officer, to insure that the equipment includes, but is not necessarily limited to the following:1.1.3.1 Air MoversAir-movers, either explosion proof and electrically operated, or air driven, eductor type only. One ai
16、r driven type is listed in the MSA catalog as a “Lamb Air-Mover Ventilator.“ Use the educing type air-movers capable of educing vapors from the tank. Air-movers blowing air into the tank are not allowed during the vapor freeing or cleaning periods of work.1.1.3.2 Combustible Gas IndicatorProvide a c
17、ombustible gas indicator.1.1.3.3 LightsProvide explosion proof portable battery powered lights (Mining Enforcement and Safety Administration approved).1.1.3.4 Miscellaneous SuppliesProvide buckets for soapy water, adequate supply of a denatured alcohol, and cotton swabs.1.2 REFERENCES*NOTE: This par
18、agraph is used to list the publications cited in the text of the guide specification. The publications are referred to in the text by basic designation only and listed in this paragraph by organization, designation, date, and title.Use the Reference Wizards Check Reference feature when you add a RID
19、 outside of the Sections SECTION 33 01 50.01 Page 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Reference Article to automatically place the reference in the Reference Article. Also use the Reference Wizards Check Reference feature to update the i
20、ssue dates.References not used in the text will automatically be deleted from this section of the project specification when you choose to reconcile references in the publish print process.*The publications listed below form a part of this specification to the extent referenced. The publications are
21、 referred to in the text by basic designation only.AMERICAN PETROLEUM INSTITUTE (API)API Std 2015 (2001) Safe Entry and Cleaning of Petroleum Storage TanksNATIONAL FIRE PROTECTION ASSOCIATION (NFPA)NFPA 70 (2008; AMD 1 2008) National Electrical CodeU.S. AIR FORCE (USAF)AF 91-501 (2004) Air Force Con
22、solidated Occupational Safety StandardAFOSHSTD 48-137 (2005, Change 2009) Respiratory Protection ProgramAFOSHSTD 91-38 (1997) Hydrocarbon Fuels - GeneralU.S. CodeUSC Title 42 The Public Health and WelfareU.S. DEPARTMENT OF DEFENSE (DOD)UFC 3-460-03 (2003; Change 1 2005) O “DO“ for District Office (E
23、ngineering Division or other organization in the District Office); “AO“ for Area Office; “RO“ for Resident Office; and “PO“ for Project Office. Codes following the “G“ typically are not used for Navy, Air Force, and NASA projects.Choose the first bracketed item for Navy, Air Force and NASA projects,
24、 or choose the second bracketed item for Army projects.*Government approval is required for submittals with a “G“ designation; submittals not having a “G“ designation are for Contractor Quality Control approval. information only. When used, a designation following the “G“ designation identifies the
25、office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:SD-07 CertificatesContractors Qualification Statement; G; G, _1.4 QUALITY ASSURANCESubmit a Contractors qualification statement similar to attachment A.1.4.1 Qualif
26、icationTo be considered qualified, the Contractor shall:a. Show proof of having completed similar work on three previous projects. The work falls into three categories; tank entry, coating, and petroleum system welding.b. Submit proof that welders are API certified.c. Certify that before commencing
27、work, the supervisor on the job site is thoroughly familiar with JP-8 fuel characteristics and worker safety requirements.1.4.2 StatementAs a minimum, include the following in the Qualification Statementa. The name and qualifications of the Contractors Representative who will be in charge of the wor
28、k and be present at the job site when any tank SECTION 33 01 50.01 Page 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-work is being accomplished.b. A complete list of equipment, with adequate nomenclature by item, to be used or available at the jo
29、b site.c. Plan of Operations.PART 2 PRODUCTSNot UsedPART 3 EXECUTION3.1 EXAMINATIONReview the drawings of the tank to be cleaned. Brief proper personnel on the location of floor pits, sumps, or other tank appurtenances considered hazardous to personnel. Work in accordance with API Std 2015, UFC 3-46
30、0-03, AFOSHSTD 48-137, AFOSHSTD 91-38, and AF 91-501, 29 CFR 1910.28 and USC Title 42 Chapter 82, Subchapter I, Section 6901. Whenever the information contained herein conflicts with the previously listed standards, the information here shall govern.3.2 PREPARATION3.2.1 Precautions3.2.1.1 Tank Envir
31、onmentConsider all tanks being cleaned, regardless of the type of fuel stored therein, as leaded and explosive until all sludge and loosely adhering rust scale have been removed.3.2.1.2 Tank Entry PermissionPrior to entry into any tank, obtain permission from the Contracting Officer and the liquid f
32、uels maintenance officer. This permission will be granted only when, or after:a. The qualified supervisor is present.b. Ppersonnel have been briefed by the supervisor on what is to be done; what each employee is to do in the event of an emergency; and how long each man or cleaning crew will remain i
33、n the tank under normal conditions.c. All required equipment is approved and properly located.d. Personnel are equipped with properly fitted protective equipment.e. The entire area adjacent to the tank is secured.f. Air-movers, eductor type only, have been operating continuously for at least one hou
34、r, and will continue to operate throughout the entire period personnel are cleaning the tank. The Contracting Officer may allow air-movers to be turned off after one hour with continuous monitoring of the vapor level below 20 percent of the Lower Explosive Limit (LEL).SECTION 33 01 50.01 Page 7Provi
35、ded by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.2.1.3 Physical ContactAvoid physical contact and take maximum care to prevent contamination of water supplies or streams. Physical contact with leaded sludge is dangerous due to the toxicity of the lead al
36、kyd compounds, either in liquid or gaseous state.a. Tests for lead in the air above any sludge which is deposited on the open ground have shown that values are low at all times, even with no apparent wind. The sludge, therefore, is safe with regard to air contamination as soon as it is spread in the
37、 open. Industrial standards of 20 ppm of organic lead is the limit in the sludge that can be considered safe after sludge has been weathered. If weathering is a treatment process, it shall be done in accordance with RCRA. If this disposal method is used, take maximum care to insure that there is no
38、runoff to contaminate water supplies or streams before the end of the weathering period.b. Smoking is prohibited, except in designated smoking areas; matches or cigarette lighters cannot be carried by the tank crew or other persons entering the tank area. Do not use brooms or brushes that have plast
39、ic synthetic bristles.c. Protect all Government equipment against dirt, water, chemical, or mechanical injury.3.2.2 Tank Ventilation3.2.2.1 Air MoversAs specified, use air-movers of the eductor type. Tank fuel vapors are heavier than air and except on hot days (25 to 45 degrees C80 Degrees F to 110
40、Degrees F), accumulate in the bottom portion of the tank. Blowing air into the tank tends to stir the vapors, requiring a long period of time before any appreciable drop in vapor-air ratio is noted. Eductor type air-movers, with flexible oil proof canvas hoses attached, inserted in the tank near the
41、 bottom will educt vapors from the tank in a short period of time. On hot days, a fog type water spray over the opening, admitting fresh air into the tank will condense vapors and facilitate removal. Keep all tank openings, except the one used to insert the oil proof flexible hose and the one admitt
42、ing fresh air into the tank, closed until workmen have entered the tank.3.2.2.2 PrecautionsAlthough eductors may be used through bottom manholes on an above ground tank, it is preferred that top manholes or vent piping be used on above ground tanks. Using eductors on top of the tank will allow for d
43、issipation of the vapors, thus preventing them from settling in low places at ground level. Close all other manholes and tank openings closed when the tank is initially ventilated. However, open them when work is started to take advantage of the light these openings let into the tank.3.2.3 Tank Prep
44、aration for Cleaning3.2.3.1 Blind FlangesProvide and install blind flanges or spectacle blinds on each pipeline connected to the tank, and each PRV system around the tank valves to be SECTION 33 01 50.01 Page 8Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
45、IHS-,-,-disconnected. When blind flanges are used, place them on the end of the pipe and not on the tank opening. If used, insert spectacle blinds between the tank valve and the flange nearest the tank. Insert gaskets on both sides of the spectacle blind. CAUTION: DO NOT REMOVE VALVES OR DISCONNECT
46、PIPING FROM ANY TANK UNTIL POSITIVELY CERTAIN THE LINE HAS BEEN EMPTIED OF FUEL. DO NOT REMOVE BLIND OR SPECTACLE FLANGES UNTIL ALL INTERIOR WORK IS COMPLETE AND THE SYSTEM IS READY TO BE PUT BACK INTO SERVICE.3.2.3.2 Tank SurveyAssure by physically surveying the area within 15 m50 feet of the tank to be entered or cleaned, that no vapors are present in pits or low places, and that unauthorized personnel are cleared from the area. Provide this area with “No Smoking
