ANSI/BISSC/Z50.2-2003
Sanitation Standard
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4.1.2 Specific
Design Requirements for Mechanical Conveying Equipment
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4.1.2.1 Buckets
shall be of seamless construction. Spaces between buckets and
chain or carrier belts shall not be less than 1⁄4 inch
(6mm).
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4.1.2.2 Drag-chain
conveyors shall not be permitted.
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4.1.3 Specific
Design Requirements for Pneumatic Conveying Equipment
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4.1.3.1 Straight
runs of pneumatic conveyors, valves and rotary feeders shall
comply with the provisions of Sections 3.1 and 3.2 except that
piping, tubing, valves or feeders which are self-purging shall
be exempt for the requirements of accessibility.
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4.1.3.2 The
entire pneumatic conveyor system shall be dust and watertight.
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4.1.3.3 Vent
openings shall be protected with filters.
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4.1.3.4 Air
supply for blowers or compressors shall be filtered to exclude
particles of 5 microns or larger.
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Created
August 2006 - American Society of Baking
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4.1.4 Specific
Design Requirements for Sifters
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4.1.4.1 Separate
conveying air systems shall be provided before and after an atmospheric
sifter in the system.
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4.1.4.2 Sifters
shall permit continuous discharge of tailings through dust-tight
connections to an enclosed container.
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4.1.4.3 Sifters
shall employ no rubbing action to facilitate product flow.
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4.1.4.4 Sifter
screen frames shall be designed to prevent replacement in an
improper position and shall be readily removable for cleaning
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4.1.4.5 Sifter
screens shall be minimum mesh to allow passage of product.
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4.1.5 Specific
Design Requirements for Weigh Hoppers
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4.1.5.1 A
removable flexible connection shall be provided between the inlet
to the hopper and the product delivery equipment
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4.1.5.2 Scale
beam or dial housings shall be closed or constructed with an
open bottom so as not to form a dirt-collecting pocket.
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4.1.6 Specific
Design Requirements for Dump Bins
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4.1.6.1 The
bag rest shelf shall either be readily removable or there shall
be a minimum of 2 inches (50mm) open space between the shelf
and the housing. It shall be a minimum of 2 inches (50mm) lower
than the edge of the dump opening of the bin or housing.
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4.1.6.2 Protective
grids shall be readily removable.
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4.1.6.3 Covers
or doors shall be provided to enclose the product zone.
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4.1.6.4 Skirts
or aprons shall not be used as exterior trim.
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4.1.7 Specific
Design Requirements for Storage and Portable Bins
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4.1.7.1 Cages
used for bin cleaning shall be designed and constructed of round
metal except for the floor, which may be constructed of flat
bars installed on edge.
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4.1.7.2 Auxiliary
agitators shall be designed and constructed to be smooth, crevice-free
and readily accessible.
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4.1.7.3 Access
openings shall be provided in all storage bins. The openings
shall be at least 18 inches (460mm) in its smaller dimension
and shall have exterior rims raised at least 1 inch (25mm). Covers
or filters for all openings shall be designed to permit ready
replacement and sealing. Bins shall have an access opening not
more than 48 inches (1.25 meter) above the discharge opening.
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4.1.8 Specific
Design Requirements for Transport Vehicles
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4.1.8.1 If
the vehicle is pneumatically discharged, the air supply shall
be filtered so as to remove particles of 5 microns or larger,
and the filters shall be accessible for inspection and cleaning.
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4.1.8.2 Discharge
piping and unloading hoses shall comply with provisions of Section
4.1.3 of this standard.
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4.1.8.3 Discharge
piping and unloading hoses shall be equipped with caps.
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4.1.8.4 Unloading
hoses, if carried, shall be carried in an enclosed space, which
is accessible and completely drainable.
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4.1.8.5 Rail
car unloaders shall comply with Sections 4.1.2 and 4.1.3 of this
standard, whichever is appropriate.
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4.1.8.6 Air
relief assemblies shall be accessible for inspection and cleaning.
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4.1.8.7 All
joints in bulk railroad cars shall be welded and made smooth.
Joints between the sides and hopper sheets are exempted from
the requirement for butt welding.
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4.1.8.8 The
delivery vehicles shall be constructed of a non-corrosive, food
grade material or coated on the interior surface (food contact
surface) with an appropriate food grade non-toxic material.
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4.1.9 Specific
Design Requirements for Reclaiming Systems
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4.1.9.1 Ingredient
reclaiming systems shall be designed and constructed to be cleanable
or readily accessible.
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4.1.9.2 Dust
shall be collected and contained for easy disposal.
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