LANL Engineering Standards Manual STD -342 100 Chapter 6 .
LANL Engineering Standards Manual STD-342-100Section D20 Plumbing/Piping/VesselsChapter 6-MechanicalRev. 6, 2/26/15TABLE OF CONTENTSD20PLUMBING/PIPING/VESSELSD20GEN GENERAL (R&D, Programmatic, and Facility) . 31.0Codes and Standards . 32.0Cross Connection Control . 33.0Expansion Control . 54.0Freeze Protection . 65.0Inspection . 6D2010 PLUMBING FIXTURES . 71.0General . 72.0Emergency Eyewash/Shower Equipment. 7D2020 POTABLE WATER . 81.0General . 82.0Disinfecting . 9D2030 SANITARY WASTE . 91.0General . 9D2040 STORM WATER . 101.0General . 10D2090 OTHER PLUMBING AND PIPING SYSTEMS (R&D, Prog, & Fac) . 101.0General . 102.0Compressed Air including Breathing Air . 153.0Natural Gas . 184.0Non-Potable Water . 195.0Radioactive Service General Guidance . 206.0Radioactive Liquid Waste . 217.0Process Liquid Waste . 218.0Vacuum . 22Page 1 of 22
LANL Engineering Standards Manual STD-342-100Chapter 6-MechanicalSection D20 Plumbing/Piping/VesselsRev. 6, 2/26/15RECORD OF REVISIONSRevDateDescriptionPOC06/28/99Document rewritten and reformatted to supportLIR 220-03-01. Superseded MechanicalFacilities Engineering Standards, Volume 6,Revision No. 15, dated 6/26/98.Danny Nguyen,Dennis McLain,PM-2FWO-FEChanged FEM to LEM. General revision andaddition of endnotes. Replaces subsections203.2-.3, 203.6, 203.8-.12, and 204.29. D2010is new.Tobin H. Oruch,Kurt Beckman,FWO-SEMFWO-SEMAdded relief valve documentation requirements.Added code, cross connect, exp control, freezeprot, and pressure systems/piping requirementsformerly in D10-30GEN; Att 1 InspectionChecklist new. ASME B31.3 Guide becameApp A.Administrative changes only. Organization andcontract reference updates from LANStransition. IMP and ISD number changes basedon new Conduct of Engineering IMP 341.Master Spec number/title updates.Pressure safety material replaced by ESMChapter 17. Metering requirements expanded.Charles DuPrè,Gurinder Grewal,FWO-DECSFWO-DOCharles DuPrè,Gurinder Grewal,FM&E-DESCENGCharles DuPrè,ES-DELarry Goen,CENGGeneral admin update, alignment to Chapter 17;minor changes to eyewashes, breathing air.Michael Ladach,Mel Burnett,ES-EPDCENGClarifications to freeze protection in 4.0.Michael Ladach,Mel 959/29/1462/26/15CONTACT THE MECHANICAL STANDARDS POCfor upkeep, interpretation, and variance issuesCh. 6, D20Mechanical POC and CommitteeThis document is online at http://engstandards.lanl.gov/Page 2 of 22OIC
LANL Engineering Standards Manual STD-342-100Chapter 6-MechanicalSection D20 Plumbing/Piping/VesselsD20Rev. 6, 2/26/15PLUMBING/PIPING/VESSELSD20GEN GENERAL (R&D, PROGRAMMATIC, AND FACILITY)1.0CODES AND STANDARDSA.Pressure vessels and boilers shall be constructed to ASME (American Society ofMechanical Engineers) Boiler and Pressure Vessel Code, except as noted in ESMChapter 17, Pressure Safety.B.Piping and other vessels shall be installed to the governing codes and LANL MasterSpecifications. Governing Codes include:1.IAPMO/ANSI Uniform Mechanical and Plumbing Codes (UMC and UPC;edition per ESM Chapter 16 Section IBC-GEN App A - LEBC) when outside thescope of ESM Chapter 17.2.0CROSS CONNECTION CONTROL2.1GeneralA.Comply with the UPC and AWWA M14, “Recommended Practice for BackflowPrevention Criterion,” for cross connection control from non-potable sources orsubstances including, but not limited to, HVAC water systems, lawn sprinklers, fireprotection systems, potable water outlets with hose fittings, etc., unless otherwise noted.B.Provide devices or assemblies installed for the prevention of backflow that have beenapproved and listed in the latest edition of Approved Backflow Prevention Assemblies bythe University of Southern California Foundation for Cross Connection Control andHydraulic Research. 1C.Separate non-potable water from potable water with a reduced-pressure-principle (RPP)backflow preventer (BFP) installed downstream of the building BFP. 2D.1.Design non-potable water systems to minimize the number of BFPs.2.Provide cross-connection control between HVAC makeup and wet lab sinks toprotect lab water purity.Locate building and fire protection BFPs inside the building to prevent freezing andfacilitate maintenance (ESM Civil POC must approve outside installations in heatedenclosures [e.g., “Hot Boxes”]). 31.123For inside installations, provide a floor drain, connected to the sanitary sewer,near the BFP, sized to handle a full-open condition. Do not install BFPs in areaswithout reliable /ANSI UPC-1-2009, Section 602.2IAPMO/ANSI UPC-1-2009, Section 603.3.8Page 3 of 22
LANL Engineering Standards Manual STD-342-100Chapter 6-MechanicalSection D20 Plumbing/Piping/VesselsE.A LANL Utilities & Infrastructure Group water system representative shall approvedesigns, submittals, and installation of BFPs installed in the site water distribution systemoutside the building wall. 41.2.22.4Locate site BFPs above ground in heated enclosures (e.g., “Hot Boxes”) set onconcrete pads and protect units from freezing.F.Provide parallel BFPs if building water supply cannot be interrupted in critical systems.G.Refer to the following LANL standards for additional requirements:51.ESM Civil Chapter for site water distribution and site BFP.2.Master Specifications for fire protection sprinklers in Division 21 for fire riserBFP.3.Master Specification 22 1100, Facility Water Distribution [building BFP]4.Fire Protection Drawing(s) ST-D4010-1, Fire Sprinkler Risers [with BFP].5.Mechanical Drawing(s) ST-D10-30GEN-1, Site/Building Water ComponentDiagram.6.Mechanical Drawing(s) ST-D2020-2, Pressure Reducing Valve.Permanent BuildingsA.2.3Rev. 6, 2/26/15Provide an RPP-BFP in the potable water service line for each permanent building. 6Temporary Office Buildings 7A.Provide a pressure-reducing valve (PRV) with a check valve in the potable water serviceline to each temporary office building (trailer, transportable, etc.).6B.Refer to Mechanical Standard Drawing, ST-D2020-2, Sheet 2, for PRV detail.Temporary Buildings with Chemical or Radiological Labs/MaterialsA.Provide an RPP-BFP in the potable water service line for each temporary building(trailer, transportable, etc.) with a chemical or radiological laboratory.B.If chemical (with the exception of janitorial chemicals) or radiological material is usedand stored (no labs) in a temporary building, consult with a LANL Water Quality Grouprepresentative to determine if a RPP-BFP is required.4LANL Utilities and Infrastructure Group is responsible for the site distribution system.The drawings and specifications provide piping details, additional design requirements, and backflow preventer specifications.6Original requirement from LANL Administrative Requirement AR 9-3, August 30, 1991 (EMref-2). Water Quality rescindedAR-9-3 and asked that the requirements be included into this chapter and the O&M Manual. RPP BFPs protect against allhazards per IAPMO UPC 1-2009, Table 6.2.7Defined in ESM Ch. 16 IBC-GEN5Page 4 of 22
LANL Engineering Standards Manual STD-342-100Section D20 Plumbing/Piping/Vessels2.52.62.7Fire Protection Systems98Provide an RPP-BFP in a new fire system sprinkler riser when the fire protection systemis supplied from a potable water system. Retrofitting existing systems is not required.B.Provide an RPP-BFP upstream of antifreeze loop(s) when a backflow preventer is notinstalled in the sprinkler riser supplied from a potable water system. Retrofitting existingantifreeze loops is required.C.Fire protection systems supplied from a dedicated fire loop or tank (non-potable water)do not require backflow protection.D.A LANL Fire Protection Group representative shall determine if parallel BFPs arerequired in the fire line.E.A LANL Fire Protection Group representative shall approve designs, submittals, andinstallation of BFPs installed in the fire line.Landscape Irrigation and Lawn SprinklersA.Provide an RPP-BFP in the potable water line supplying the irrigation system.B.Locate the backflow preventer outside above ground in a heated enclosure (“Hot Box”)set on a concrete pad or within the building in a heated space.Heat ExchangersHeat exchangers used for heat transfer, heat recovery, or solar heating shall protect thepotable water system from being contaminated by the heat transfer medium. Refer toUPC Section 603.4.4.EXPANSION CONTROLA.8Rev. 6, 2/26/15A.A.3.0Chapter 6-MechanicalExpansion Tanks:1.Any water system provided with a check valve, backflow preventer, or any othernormally closed device that prevents dissipation of building pressure back intothe water main shall be provided with an approved, listed, and adequately sizedexpansion tank or other approved device having a similar function to controlthermal expansion. 92.Provide ASME-coded expansion tank for systems designed to operate at or above30 psig.3.Size tanks per UMC, ASHRAE, or manufacturer’s recommendations.4.Locate expansion tank on the suction (low pressure) side of the distributionpumping system to ensure proper operation.IAPMO/ANSI UPC 1-2009, Section 603.4.16UMC 2009 Section 608.3Page 5 of 22
LANL Engineering Standards Manual STD-342-100Chapter 6-MechanicalSection D20 Plumbing/Piping/Vessels4.05.Guidance: Diaphragm (bladder type) tanks are recommended because theyprevent air from entering the systems.6.Guidance: Provide vertical models with floor stand when practical for spacereasons.FREEZE PROTECTION 10A.For closed aqueous systems exposed to freezing temperatures -- including and potableand non-potable water (including lawn sprinklers) -- provide freeze protection, such asheater cable or antifreeze, to prevent building and equipment damage when insulationalone will not prevent freezing due to insufficient water flow rate or still water.1.B.C.5.0Rev. 6, 2/26/15For fire sprinklers follow NFPA 13 and applicable Div 21 LANL Master Specinstead of this section.Antifreeze: If necessary, provide industrially inhibited propylene glycol (phosphatebased) fluid manufactured by the Dow Chemical Company (Dowfrost) or approvedequal, complying with ASTM D1384.1.Install in accordance with the manufacturer’s instructions.2.Do not use automatic water make-up systems to prevent system contamination orsystem dilution. Provide an alarm in lieu of an automatic fill line to detect loss ofantifreeze.3.Guidance: Minimum mixture 50 percent glycol by volume will provide protectiondown to approximately minus 28 degrees F for still water.Heat Tape: Specify self-regulating heater cable, hard-wired to a dedicated equipmentprotective device ground fault circuit. Provide a lockable (weatherproof, if outdoors)disconnect switch to facilitate lockout/tagout. 111.Comply with requirements of NEC.2.Size and install heat tape in accordance with the manufacturer’s instructions.3.Refer to LMS 22 0535, Electric Heat Tracing Systems, and MechanicalStandard Drawing(s) ST-D20GEN-2, Water Piping Freeze Protection.4.Label piping “Electric Traced” (refer to LANL Master Specification 22 0554,Identification for Plumbing, HVAC, and Fire Piping and Equipment).5.Guidance: For critical facilities, a circuit continuity alarm may be required todetect loss of electrical power; see ESM Chapter 8.INSPECTIONA.Comply with inspection requirements in applicable piping codes and LANL MasterSpecifications.10IAPMO/ANSI UPC 1-2009 UPC, Section 313.6The self-regulating effect allows the cable to be overlapped without creating hot spots or burnout. As the cable self-regulatesits heat output, it provides for the efficient use of electric power, producing heat only when and where it is needed and alsolimiting the maximum sheath temperature.11Page 6 of 22
LANL Engineering Standards Manual STD-342-100Chapter 6-MechanicalSection D20 Plumbing/Piping/VesselsD20101.0PLUMBING FIXTURESGENERALA.Provide water-conserving fixtures in accordance with the UPC. 12B.Provide toilet room fixtures, lavatories, urinals, and water closets, with ADA-compliantinfrared sensors for automatic no-hands operation. 131.2.0Rev. 6, 2/26/15Provide water closet flushometer with override button.C.Fixture counts shall be per the UPC unless specifically changed by Architectural Chapter(in Section C-C1030).D.Guidance: Provide sinks (kitchen, janitor closets, laboratories, etc.) with gooseneck typefaucets to facilitate handling large containers.E.Refer to LANL Master Specification 22 4200, Plumbing Fixtures, for additionalrequirements.EMERGENCY EYEWASH/SHOWER EQUIPMENTA.Comply with ISEA Z358.1 on Emergency Eyewash and Shower Equipment.B.Provide tepid water to emergency equipment except for existing systems. 141.Provide a prepackaged, fully engineered and tested, mixing valve assemblyfurnished and/or manufactured by the manufacturer of the emergency equipment.Guidance: A comfortable delivered water temperature range (per ANSI Z358.12009 , Appendix B) is 60-100 degrees F. Units should be designed to provide aminimum discharge temperature of 80 F. .C.Drains are not required to be provided for eye washes, safety showers, or combinationinstallations. They shall not be routed to sanitary drains, storm drains, or the radioactiveliquid waste system. If installed, the drains should be routed to a holding tank capable ofaccepting a minimum full rated flow (not less than 20 GPM) for a single installation.Sampling of collected water will determine appropriate disposal path. Consult IndustrialSafety and Hygiene Group for determining usage factor for multiple installations.D.Refer to the following LANL Standards for additional requirements:1.Decontamination showers for rad areas: Provide tepid water per above and drainto RLW (or intermediate holding if directed by LANL). See ESM Chapter 11,Rad Protection, for additional requirements.2.Mechanical Drawing(s) ST-D2010-1, Emergency Shower/Eye wash3.LANL Master Specification 22 4200, Plumbing Fixtures12IAPMO/ANSI UPC-1-2009 UPC, Section 402.0.Automatic no-hands fixtures conserve water, require less maintenance, and help to control the spread of infectious diseases.14ANSI/ISEA Z358.1-2004 requirements.13Page 7 of 22
LANL Engineering Standards Manual STD-342-100Chapter 6-MechanicalSection D20 Plumbing/Piping/VesselsD20201.0Rev. 6, 2/26/15POTABLE WATERGENERALA.Provide cross connection control devices in the building potable water system. Refer toCross Connection Control Subsection above.B.Correct gas water heater selection for altitude. Refer to Mechanical Section D30GEN,Altitude Correction Subsection.C.Provide a building water pressure-regulating valve (PRV) when static pressure is inexcess of 80 psi. 151.Guidance: A setpoint of less than 60 psig may result in insufficient commodeflush water for proper sewer line sweep. A PRV may be required in the buildingsupply line or supply lines to critical equipment if fluctuations in pressure cannotbe tolerated.D.Provide potable water to all plumbing fixtures, emergency safety showers, and eyewashunits. 16 For exceptions to plumbing fixtures located in laboratories, refer to Non-PotableWater subsection below.E.Provide potable hot water to lavatories and sinks serving office spaces. 17F.Provide a recirculation pump in the hot water system when the developed length ofpiping from the heater to the fixture exceeds 100 feet. Set the aquastat at 95 degrees F tocontrol the pump. Guidance: In installations where the hot water use is fairly continuous,eliminate the thermostat and run the pump continuously. In either case, considerincluding a timeclock to save energy during off-hours. 18G.Guidance: Point-of-use electric tankless heaters are not recommended except foremergency applications (ex. eyewash and safety showers) where used infrequently. 19H.Building water meters are typically required. Refer to Mechanical SectionD10-30GEN, Meters subsection.I.Refer to the following LANL standards for additional requirements: 201.Mechanical Drawing(s) ST-D2020-1, Site/Building Water Component Diagram2.Standard Detail ST-D2020-2, Water PRV Piping Detail15IAPMO/ANSI UPC-1-2009 UPC, Section 608.2.IAPMO/ANSI UPC-1-2009 UPC, Section 601.1.17LANL requirement for comfort. The UPC does not require hot water to be connected to sinks and lavs serving office spaces.18American Society of Plumbing Engineers (ASPE) Data Book, 1983-84, Pages 4-5, Supply Piping System (EMref-6). (Note:EMref refers to a ESM team system for managing hard-to-find reference hardcopies.)19LANL water is high in silica and eventually scale deposit will reduce the efficiency of the heating element, and the unit orheating element will have to be replaced. Safety equipment use is infrequent so tankless saves energy over having a large tank,but payback must be calculated.20The drawings and/or specifications provide acceptable piping installation details, material specifications, and additional designcriteria.16Page 8 of 22
LANL Engineering Standards Manual STD-342-100Chapter 6-MechanicalSection D20 Plumbing/Piping/Vessels2.03.Master Specification 22 1100, Facility Water Distribution4.Master Specification 22 3700, Domestic Water Heaters5.ESM Civil Chapter for site water distribution system.DISINFECTINGA.D20301.0Rev. 6, 2/26/15Disinfect new or repaired potable water systems in accordance with LANL MasterSpecification 22 0816. 21SANITARY WASTEGENERALA.Connect discharge from soil, waste
LANL Engineering Standards Manual STD -342 100 Chapter 6-Mechanical Section D20 Plumbing/Piping/Vessels Rev. 6, . Provide cross-connection control between HVAC makeup and wet lab sinks to protect lab water purity. . F. Provide parallel BFPs if building water supply cannot be interrupted in critical systems.
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LANL Master Specifications STD-342-200 Seismic Spec-Editing for Electrical/Fire Alarm Components Rev. 1, 05/10/21 Page 1 of 9 This Guide will aid editing of the Division-26 LANL Master Specification templates pertaining to electrical components1 that are permanently attached to structures (i.e., in International Building Code [IBC
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