July 22, 1994

Contract \# TW0592

**SPECIAL SPECIFICATION**

**SECTION 15495**

**[SELF-CONTAINED, OPEN-CIRCUIT, COMPRESSED-AIR,]{.underline}**

**[BREATHING APPARATUS]{.underline}**

**[Page]{.underline}**

**[PART 1 - GENERAL]{.underline}**

1.01 Description. 2

1.02 Related work. 2

1.03Quality Assurance. 2

1.04References. 3

1.05Submittals. 3

1.06 Delivery, Storage, and Handling. 3

**[PART 2 - PRODUCTS]{.underline}**

2.01Acceptable Manufacturers. 4

2.02 Equipment.. 4

**[PART 3 - EXECUTION]{.underline}**

3.01 Inspection. 9

3.02 Installation/Application/Erection. 9

3.03 Field Quality Control. 9

3.04 Demonstration. 9

**SPECIAL SPECIFICATION**

**SECTION 15495**

**[SELF-CONTAINED, OPEN-CIRCUIT, COMPRESSED-AIR,]{.underline}**

**[BREATHING APPARATUS]{.underline}**

**[PART 1 - GENERAL]{.underline}**

**1.01 [DESCRIPTION]{.underline}**

> A. This Section describes the physical and performance requirements of
> a self-contained, open-circuit, compressed-air, breathing apparatus
> (SCBA).
>
> B. The SCBA is composed of the following sub-assemblies: cylinder and
> valve, a full face-piece, pressure reducing regulator, breathing
> regulator, a harness and back-frame, and a cylinder-pressure gauge.

**1.02 [RELATED WORK]{.underline}**

> A. Section 01300
>
> B. Section 15010

**1.03 [QUALITY ASSURANCE]{.underline}**

> A. SCBA: Provide a unit that is certified by National Institute for
> Occupational and Health (NIOSH)/Mine Safety and Health Administration
> (MSHA) to meet Code of Federal Regulations, Title 30, Part 11,
> Sub-part H (30 CFR 11) for the time duration specified.
>
> B. SCBA: Provide a unit that meets the requirements of National Fire
> Protection Association (NFPA) 1981.
>
> C. Cylinder: Provide a cylinder that is in accordance with Department
> of Transportation (DOT) specifications.
>
> D. Full Face-Piece: Provide a full face-piece that maintains the
> NIOSH/MSHA certification of the SCBA regardless of the size used.
>
> E. Face-Piece, Face-Shield: Provide a face-piece face-shield that
> meets the impact and penetration requirements of American National
> Standards Institute (ANSI) Z87.1 paragraphs 5.2.8.1 and 5.2.8.2.
>
> F. Warranty: Provide each unit with a 5-year warranty.
>
> G. Basis of Design: Scott Aviation - Air-Pak 2.2 Positive Pressure

**1.04 [REFERENCES]{.underline}**

> A. 30 CFR 11, PART 11-Respiratory Protective Devices; Tests for
> Permissibility; Fees, Subpart H-Self-Contained Breathing Apparatus.
>
> B. NFPA 1981, Open-Circuit Self-Contained Breathing Apparatus for Fire
> Fighters.
>
> C. DOT specifications.
>
> D. ANSI Z87.1 paragraphs 5.2.8.1 and 5.2.8.
>
> E. Compressed Gas Association (CGA) Standards

**1.05 [SUBMITTALS]{.underline}**

> A. Make submittals according to this Section, Section 15010, and
> Section 01300.
>
> B. Submit product data for each type of full face-piece, cylinder and
> valve assembly, pressure reducing regulator, face-piece-mounted,
> positive-pressure, breathing regulator, and harness and back-frame
> assembly specified. Include design requirements.
>
> C. Submit NIOSH/MSHA product certificate.
>
> D. Submit maintenance data in the operating and maintenance manual as
> specified in Section 01300.

**1.06 [DELIVERY, STORAGE, AND HANDLING]{.underline}**

> A. See Section 15010.

**[PART 2 - PRODUCTS]{.underline}**

**2.01 [ACCEPTABLE MANUFACTURERS]{.underline}**

> A. Scott Aviation, Div. of Figgie International, Inc.
>
> B. Industrial Safety & Security Co.
>
> C. Respiratory Systems, Inc.

**2.02 [EQUIPMENT]{.underline}**

> A. General
>
> 1\. Design Requirements
>
> a\. Cylinder Working Pressure: 2216 pounds-per-square-inch-gage
> (psig).
>
> b\. 30-Minute Cylinder Water Capacity: 516 cubic-feet (ft3).
>
> c\. 30-Minute Cylinder Free-Gas Capacity: 45 ft3.
>
> d\. Pressure-Reducing Regulator Air-Line Pressure Rating: 150 psig.
>
> e\. Pressure-Reducing Regulator Flow-Rate: 400 liters-per-minute
> (lpm).
>
> f\. Face-Piece-Mounted, Positive-Pressure, Breathing Regulator
> Flow-Rates:
>
> 1\) maximum: 500 lpm.
>
> 2\) minimum: 160 lpm.
>
> g\. Purge Valve Flow-Rate: 125 lpm.
>
> B. Cylinder and Valve Assembly
>
> 1\. Equip each cylinder and valve assembly with a hanger bracket for
> locking the assembly to the back-frame.
>
> 2\. Cylinder
>
> a\. Provide a light-weight composite type cylinder, consisting of an
> aluminum inner shell, hoop wrapped with resin impregnated glass
> filament.
>
> b\. Use cylinder threads that are straight with an O-ring or quad-ring
> gasket type seal.
>
> c\. Paint each cylinder yellow.
>
> 3\. Valve Assembly
>
> a\. Provide a valve assembly composed of:
>
> 1\) a hand activated valve mechanism with a spring-loaded,
> positive-action, rachet type safety lock and lock-out release for
> selecting \"lock open service\" or \"non-lock open service\";
>
> 2\) an upstream connected frangible disc safety relief device;
>
> 3\) a dual reading pressure gauge indicating cylinder pressure at all
> times; and
>
> 4\) an elastomeric bumper.
>
> b\. Provide a \"fail-open\" cylinder valve constructed of forged
> aluminum.
>
> c\. Design the cylinder valve so that no stem packing gland nuts are
> required.
>
> d\. Provide an upper and lower seat so that the pressure will seal the
> stem on the upper seat.
>
> e\. Design the valve construction so that damage does not occur if the
> coupling is over-torqued by hand.
>
> f\. Provide a cylinder valve outlet that is interchangeable with the
> CGA standard threaded connection number 346 for breathing air.
>
> C. Full Face-Piece Assembly
>
> 1\. Provide an assembly consisting of: face seal, lens, head harness,
> voice transmitters, nose cup, and ducts.
>
> 2\. Provide three color coded face seal sizes which all maintain
> NIOSH/MSHA certification. Use a blend of natural rubber/EPDM for the
> face seal. Secure the face seal to the lens.
>
> 3\. Provide a single, replaceable lens. Make the lens out of
> non-shatter type polycarbonate material. Use polycarbonate material
> designed to meet the impact and penetration requirements of a
> face-shield per ANSI Z87.1 paragraphs 5.2.8.1 and 5.2.8.2. Coat the
> polycarbonate with a silicone based coating to resist abrasion,
> chemical attack, and meet the requirements of NFPA 1981 for lens
> abrasion. Provide connections on the lens consisting of: a 1/4 turn
> coupling for the breathing regulator, two locations for voice
> transmitters, and the head harness.
>
> 4\. Provide a head harness that uses a four-point suspension. Use
> Kevlar for the material for flame resistance. Provide two flame
> resistant elastic straps, attached to the lens in four locations for
> face sealing adjustments.
>
> 5\. Provide a multi-directional voice transmitters with ducts to the
> nose cup which enhances voice transmission and minimizes lens fogging.
>
> D. Pressure Reducing Regulator Assembly
>
> 1\. Provide an assembly consisting of: hose, back-up pressure reducing
> valve, automatic transfer valve, press-to-test valve, O-ring seals,
> outlet-manifold, reseatable over-pressurization relief valve, and an
> optional outlet manifold, cylinder valve. Mount the assembly on the
> back-frame.
>
> 2\. Provide an internally armored high pressure hose with a hand
> coupling. Route this hose from the pressure reducing regulator to the
> cylinder valve.
>
> 3\. Provide a back-up pressure reducing valve (rather than a manual
> by-pass). Connect the back-up pressure reducing valve in parallel with
> the primary pressure reducing valve and an automatic transfer valve
> for redundant control.
>
> 4\. Provide an automatic transfer valve to switch from the primary
> pressure reducing valve to the back-up pressure reducing valve due to
> either a malfunction or low cylinder pressure.
>
> 5\. Provide O-rings composed of fluorosilicone elastomer.
>
> 6\. Provide a press-to-test valve for bench testing the back-up
> pressure reducing valve.
>
> 7\. Provide the pressure reducing regulator outlet manifold with a
> reseatable over-pressurization relief valve to protect the low
> pressure hose and face-shield-mounted, breathing regulator.
>
> 8\. Provide the following as part of the optional pressure reducing
> regulator outlet manifold of the pressure reducing regulator.
>
> a\. Provide an optional outlet manifold which has a connection for an
> compressed air-line for extended duration use.
>
> b\. Provide a check valve in the optional manifold to prevent the
> external release of cylinder air if the air-line is either not used or
> disconnected.
>
> c\. Provide a second outlet port for use with an auxiliary supply hose
> to support a second breathing regulator. Locate the auxiliary hose on
> the primary user\'s right shoulder with a quick-disconnect fitting
> suitable for operation with gloves or suitable in low light. Protect
> the coupling against inadvertent disconnect. Supply the second port
> from the primary pressure reducing valve.
>
> E. Face-Piece-Mounted, Positive-Pressure, Breathing Regulator Assembly
>
> 1\. Provide an assembly consisting of: breathing regulator (with
> respiration responsive diaphragm, demand valve, exhalation valve, and
> purge valve), low pressure hose, alarm device and sensor,
> donning/doffing switch, optional regulator, and optional flame
> resistant cover.
>
> 2\. Provide a breathing regulator that maintains air to the face-piece
> at a pressure of 1.5 inches water gage above atmospheric at minimum
> and maximum flow-rates. Construct the breathing regulator of
> corrosion-resistant materials. which are also flame-resistant. Include
> with the breathing regulator a demand valve which delivers air to the
> user when activated by a respiration responsive diaphragm. Provide
> fluorosilicone elastomer O-rings for the demand valve. Include with
> the respiration responsive diaphragm a silicone elastomer exhalation
> valve. Provide at the breathing regulator inlet a purge valve which
> diverts up to 125 lpm to the face-piece for defogging.
>
> 3\. Provide a low pressure hose sheathed in Kevlar between the
> breathing regulator and pressure reducing regulator.
>
> 4\. Provide an alarm and sensor which is mounted in the
> face-piece-mounted breathing regulator which detects the switch from
> the primary pressure reducing valve to the back-up pressure reducing
> valve. Use audible and face-piece vibration to signal the alarm.
>
> 5\. Provide a donning/doffing switch which prevents any free flow of
> air when the face-piece if regulator is removed from the face by
> depressing and releasing the push-button. Locate the push-button at
> the top, center of the face-piece-mounted, breathing regulator.
>
> F. Harness and Back-Frame Assembly
>
> 1\. Provide a light-weight adjustable lumbar-support style harness and
> back-frame assembly for the cylinder and valve assembly and the
> pressure reducing regulator assembly. Provide a back-frame assembly
> consisting of: a support structure, an adjustable aluminum band, and a
> guarded hook. Provide a harness assembly consisting of: a waist belt
> and two shoulder straps.
>
> 2\. Provide a corrosion-resistant, wire-form back-frame with a guarded
> hook for positioning the cylinder and valve assembly hanger bracket.
>
> 3\. Provide a two-position adjustable aluminum band coupled with a
> ramp adjustable toggle clamp for securing either a 15- or 30-minute
> compressed-air cylinder.
>
> 4\. Design the harness assembly so that the majority of the weight is
> carried on the hips and must be attached to the back-frame by use of
> threaded fasteners for ease of replacement. Construct the harness of
> Kevlar for flame-resistance.
>
> 5\. Provide the waist-belt with a quick-release metal buckle and two
> web adjusters, located on one on each side at the hip. Design
> adjustment of the waist-belt to use simultaneous pulling of the
> free-end of the web at each adjuster.
>
> 6\. Design each shoulder strap to connect to the rear section of the
> waist-belt at one end, and to the rigid section of the back-frame at
> the other end. Provide each shoulder strap with a web adjuster for
> quick adjustment and release of the shoulder straps.
>
> G. Cylinder-Pressure Gauge Assembly
>
> 1\. Provide a cylinder-pressure gauge with a bracket for attaching the
> pressure gauge to the shoulder strap.
>
> H. Housing
>
> 1\. Provide a completely enclosed housing for holding the SCBA when
> not in use.
>
> 2\. Use polycarbonate materials in construction of the dust-tight
> housing. Design the housing for mounting on a wall. Provide all
> required mounting hardware.

**[PART 3 - EXECUTION]{.underline}**

**3.01 [INSPECTION]{.underline}**

> A. Inspect area and conditions under which the SCBA is to be
> installed. Do not proceed with work until unsatisfactory conditions
> have been corrected in a manner acceptable to the Installer.

**3.02 [INSTALLATION/APPLICATION/ERECTION]{.underline}**

> A. Install housing at location shown on the Drawings.

**3.03 [FIELD QUALITY CONTROL]{.underline}**

> A. Provide a factory-trained representative for testing the SCBA and
> verifying the SCBA operation.

**3.04 [DEMONSTRATION]{.underline}**

> A. Provide a factory-trained instructor for instruction in the
> operation and maintenance of the SCBA. Allow 8 hours for this
> instruction period.
>
> END OF SECTION