Attachment 0001 Purchase Description 150 Gallon Mixer r2.pdf

5 October 2023

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Purchase Description for 150 Gallon Vertical High-Shear Mixer for Explosives

Scope

The following document provides the requirements and specifications for 150

Gallon Vertical High-Shear Mixer (VHSM) for Explosives.

Applicable Documents

1. Standards and Regulations:

a. Some project specifications are referenced to Industry Codes and Standards such as API, ANSI, ISO etc. Though the referenced versions may not be the latest ones, the Vendor shall ensure the complete unit covered in this Purchase Description fully complies with the latest version prevailing at the time of PO award.

b. DA Pamphlet 385-64.

Requirements

2. General Requirements This section provides the general design specification requirements for 150 Gallon

VHSM for explosives to include mix bowls and any peripheral equipment.

a. System shall meet all applicable OSHA standards and regulations.

b. Elimination of pinch points is to be considered during design. Guards and plaques will be added where needed.

c. Ease of maintenance shall be a design consideration for all portions.

d. The design should utilize commercial-off-the-shelf items whenever possible to facilitate repair and replacement of worn and/or damaged parts.

e. All exposed materials shall be coated/painted or made of non-ferrous materials to prevent corrosion.

f. All materials/parts that come into contact with product being mixed (“wetted materials”) shall be constructed of AISI 304, 304L, 316, 316L stainless steel or an equivalent.

g. To the greatest extent possible open frame structural members (i.e. I-beam, C-channel, L-angle, etc.) in lieu of tubular structural members (i.e. square tubing, round tubing, pipe, etc.).

h. All seams between structural members that are not 100% welded should be sealed using silicone caulking prior to painting.

i. Each system shall be rated for operation in a hazardous environment that corresponds the NFPA 70 Class 1, Div. 1, Group D, and Class 2, Div. 1, Group E, F, and G.

j. All fittings, connections, and bolts shall be U.S. customary or standard units

(inch). In the case of vacuum connections ISO-K type connections are acceptable.

k. Mixer shall be designed in such way as to mix material under full vacuum.

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3. Specific Requirements

This section provides the design specification requirements for the VHSM to include mix bowls and any peripheral equipment.

a. Mixer Type: The mixer shall be the vertical mixer style consisting of two blades set for dual planetary mix motion with one “slow” blade and one

“fast” blade.

b. Volumetric Capacity: With the bowl in the mixing position the mixer shall have at minimum a nominal working capacity of 150 U.S. gallons (568

Liters). The “nominal working capacity” shall be defined as “up to 1 inch below the top surface of the mixing blades when the mixer blades are immersed.

c. Power/Torque Capability: The available power rating will permit reliable mixing of materials with viscosities as high as 150 kilopoise (150,000 poise).

The drive components and internal gearing of the mixer shall be rated for the maximum torque required to mix materials with such a viscosity at the maximum fast blade speed.

d. Stand/Structure: The support structure shall be rigid and sturdy enough to adequately support the drive system, bowl lift mechanism, and mixer housings.

e. Drive System: Mixer motor shall be inverter duty rated for a 460 Volt, 60 Hertz, 3 phase power supply and controlled via a variable frequency drive

(VFD).

f. Housings: Any portion of the housing that will come into contact with materials being mixed should comply with section 2.f. Housing shall be designed to operate under full vacuum while mixing. Housing shall contain access ports for maintenance and inspection.

g. Housing Process Ports: Mixer housing shall contain ports for process feed connections, pressure relief connections, vacuum connections, and camera monitoring connections. All ports shall be pipe flange connections sized appropriately for the port. Minimum port sizes and numbers shall be as listed below:

i. Four (4) six inch (6”) pressure relief ports equipped with burst disks.

ii. Two (2) four inch (4”) powder charging ports

iii. One (1) six inch (6”) powder charging port located on the opposite side of the mixer from the two four inch powder charging ports.

iv. One (1) two inch (2”) vacuum port (ISO-K fittings acceptable for this connection

v. One (1) four inch (4”) camera port

vi. One (1) three inch (3”) port for light oriented no more than ninety degrees (90°) from the camera port

vii. Four (4) two inch (2”) feed ports

h. Seals: Seals between shall be adequate to prevent any invasive material from propagating from the process/mix area into the bearing area or lubricants in the bearing area entering the process area.

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i. Maximum mixing blade speed:

i. Fast (outer) blade maximum speed: 52 revolutions per minute

ii. Slow (inner) blade maximum speed: 26 revolutions per minute

j. Blade Clearances: Blade clearances between each other and mixing bowl wall and bottom shall NOT be less than one quarter (0.250) inches.

k. Bowl Lift System: The mixer shall be equipped with a system for raising and lowering the bowl from the mix position. This system shall be self-aligning to ensure the mix bowl correctly and accurately engages with the mixer housing. It shall be designed in such a way that excessive tilting and misalignment does not occur during abnormal operation such as a loss of electric or hydraulic power.

l. Auxiliary Power Sources: If power sources other than electric (i.e., hydraulic, pneumatic) are required for operation of the mixer, the power unit for said source shall be provided with the mixer. It shall be sized appropriately for the operational requirements and meet all necessary classifications and safety standards.

m. Machine Finishes: The interior surfaces that make contact with the materials being mixed shall be polished to a 0.60μm (23 micro-inch) or better finish.

Weld areas and casting surfaces are subjected to a dye penetrant inspection to assure that they are free from crevices, cracks or other harmful imperfections. Exterior machined surfaces shall be 3.2 μm RMS (125 μin RMS) or better. All exterior non-machined surfaces constructed of stainless steel are glass-beaded to a 2A finish. After meeting all inspection requirements, exterior surfaces constructed of carbon steel shall be coated/painted to prevent corrosion.

n. Bowl “Quick-Drop” Lowering System: Mixer shall be equipped with a system that in an abnormal event where pressure builds in the mix chamber the bowl is quickly lowered a minimum of 6-10 inches to relieve pressure. This system shall be configured such that it can be connected to a fire suppression system. It shall be interconnected with the vacuum/pressure switch.

o. Mix Bowls:

i. A quantity of two (2) mix bowls shall be provided with the mixer system. Both bowls shall conform to the below.

ii. The interior surfaces of the mix bowl shall be polished to a 0.60 μm

(23 micro-inch) or better finish and subjected to a dye penetrant inspection to assure that they are free from crevices, cracks or other harmful imperfections.

iii. The mix bowl shall be fabricated with a jacket to enable a temperature control fluid to be circulated in the jacket for control of the mix temperature. The mix bowl jacket shall be rated for a minimum 125 psig at a temperature of 200°F and shall adhere to any applicable AMSE pressure vessel codes.

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iv. The bowl shall be equipped with a seal flange to mate with the mixer to ensure retention of full vacuum when mixing. This seal flange shall also seal against the bowl cover assembly (see 3.o.vii).

v. Two (2) connections for the jacket inlet/outlet shall be provided and shall be at minimum 1-1/4” size.

vi. The bowl shall be equipped with an six-inch (6”) bottom discharge opening for removing product from bowl with a bolting flange connection.

vii. Bowl shall be fabricated and rated a minimum of 75 psig at a temperature of 200°F internal pressure for discharging product.

viii. Bowl shall be equipped with four v-grove type casters. Two of the casters shall be driven simultaneously by an air drive motor.

p. One (1) Cover plate shall be provided. The mix bowl cover plate is used in conjunction with the bottom discharge and bowl pressure plate. Cover shall be rated for 75 psig at a temperature of 200°F and capable of accepting full vacuum. Cover shall be equipped with clamps for attachment to the bowl.

Cover shall be equipped with two (2) one inch (1”) pipe connections for pressurizing and venting of bowl during discharge. Cover shall be equipped with connection points for a three-point lift rigging.

q. One (1) bowl pressure plate shall be provided. The bowl pressure plate shall be used in conjunction with the bottom discharge opening and the bowl cover. Up to a maximum of 75 psig at a temperature of 200°F air shall be used through the cover to exert force down on the pressure plate extruding product out of the bottom discharge. Plate shall be designed to float inside bowl and utilize a wiper type seal to mate with the bowl side.

r. Controls and Sensors:

i. Operator controls shall be provided by the MCAAP, but the mixer, bowl, and peripherals shall be equipped with following electronic sensors for tying into the MCAAP control system.

1. Bowl position proximity sensors for indicating the bowl is in position for lifting, the bowl is in the full up position, and bowl is in the full down position.

2. Vacuum/Pressure Switch for sensing the vacuum or pressure in the mixing bowl area.

3. Oil flow monitors/meters for monitoring lubricant flow in the rotating housing.

4. Blade position sensor indicating the rotational position of the mixing blades.

s. Spare Parts: A minimum of two sets of any parts that are consumed during routine maintenance and checks shall be provided with the system, i.e. seal kits.

4. Shipping/Installation/Field Service and Support

Shipping, Installation, Field Service and Support shall be included in the proposal but will need to be a separate line item. The address for shipment of the mixer and its components is:

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McAlester Army Ammunition Plant Receiving Officer, Warehouse 8 1 C Tree Road McAlester, OK 74501-9002

Proposal, Reviews, Drawings, Documentation, and Data

5. Prior to Award

DETAILED DESCRIPTION REQUIRED PRIOR TO AWARD: MCAAP personnel will validate and verify/approve the offeror’s proposal before award is granted. To meet this review requirement, the offeror shall submit with their proposal a detailed technical description of each item. The offeror’s description submittal shall account for each one of the required product features located in this qualifying statement.

The description shall also clearly portray/describe how each item will function. If qualifying on an “equivalent” basis, proposal should list in detail where the proposed item is equivalent to the model/item requested and any “non-equivalencies” must be explained. Enough information must be provided that the government technical reviewer can verify equivalency. An offeror’s opinion that their product is “equivalent” is not sufficient. If applicable, conceptual drawings that are not detail “as built” drawings should be provided as part of the detailed description. Drawing must provide overall height, width, and length dimensions. It should depict the locations of key components. If there is a picture of the equipment or portions of the equipment, such as from a brochure, then that picture(s) should be included with the data. It is advantageous for the contractor to supply as much data as possible as the government will use this to approve the proposed equipment, as related to this purchase description, for production and/or purchase.

Generic statements from the offeror stating they can provide the requested item

DO NOT constitute a valid proposal.

6. After Award Reviews After an award, the contractor shall provide the government with, at minimum, a

30% progress/status update, a 60% progress/status update, a 90% progress/status update, and a notification when the item is shipped. If there are any unforeseen delays the government contract officer should be notified immediately. It is the sole purview of the MCAAP Engineering personnel to waive the necessity of these progress/status updates. The progress/status updates shall take the form of design reviews as necessitated by the procurement type and determined by government personnel. Government personnel will typically conduct these reviews utilizing video conferencing; however the government reserves the right to perform these reviews in person if it is deemed necessary by the government.

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7. Finalized Drawings, 3-D CAD Model, and Data

The contractor shall provide a complete set of as-built reproducible drawings/data.

The drawings/data shall include, at minimum, the requirements of paragraph above. The final drawings/data shall be in electronic format. The contractor shall also provide a dimensionally accurate 3-D CAD model of all mixer components.

The format must be capable of being read as “.dwg” or “.dxf” for 2-D data and Solid

Works (.sldprt, .sldasm) format or STEP (.stp) format. This shall be submitted with

All drawings/data shall be authorized for reproduction and distribution to end users of the equipment.

8. Operational, Maintenance, and Parts Manuals

The contractor shall furnish under this purchase description a set of operational, maintenance, and parts manuals as necessitated by the equipment. The manuals shall be specific (not canned statements about the system in general) to the system supplied. There shall be a brief description concerning the purpose of the specific equipment supplied and the rated operating capacities. The manuals shall contain a complete parts list to include (at minimum) all information necessary

(manufacturer’s name, address, phone number, P/N, S/N, size, model number, type, etc.) to re-order the part if necessary. The manuals shall include all preventative maintenance procedures/schedules specific to the equipment supplied. They shall include a listing of recommend spare parts that should be kept on hand for routine maintenance. These manuals shall be applicable to the equipment provided only and shall include all safety precautions/warnings associated with the operation. All manuals shall be authorized for reproduction and distribution to end users of the equipment. The set of manuals shall be electronic in form (on CD) and must be capable of being read in either a “.pdf” or a “.doc

(.docx)” format.

Quality Assurance Provisions

9. Responsibility for Inspection

Unless otherwise specified in the contract or purchase description the contractor is responsible for the performance of all inspection requirements specified herein.

Except as otherwise specified the contractor may use their own facilities or any commercial laboratory acceptable to the government. The government reserves the right to witness or separately perform any of the inspections set forth in the purchase description where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. The contractor shall notify the contracting officer at least 15 working days prior to shipment so a government representative(s) can make arrangements to be present to perform an acceptance inspection if necessary. Final acceptance of the contract shall be the responsibility of the government contracting officer.

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10. Quality Management

Contractor must show proof of internal quality management system in accordance with MIL-I-45208A, ISO 9001: 2000 or an equivalent quality assurance program.

The contractor shall certify and maintain substantiating evidence that the product meets the provided drawing specification, and quality assurance requirements.

This includes manufacture and welding requirements. The manufacturer may use their own inspection facility or any commercial facility agreeable to the government.

The government reserves the right to witness the inspections of all components of this system for conformity of specifications.

Warranty

Contractor shall provide a warranty against defective material, parts, and workmanship for a period no less than 1 year from the delivery date.