4.20 DESIGN REQUIREMENTS FOR LIQUID FERMENT EQUIPMENT
4.20.1 Definitions
4.20.1.1 Liquid Ferment Equipment is that equipment in which
a part of the ingredients for bakery products is fermented in
a liquid media.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.1.2 Fermentation Tanks shall include those tanks for products
of fermentation whether designed for mixing, holding, aging,
cooling or for any other function within a liquid ferment system.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2 Specific Design Requirements
4.20.2.1 The system shall be designed to facilitate cleaning
in place (CIP) or sanitary take-apart. All components of the
system shall be constructed to facilitate complete drainage.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.2 That portion of the metal used to join the inside tank
lining to the outer wall shall be integral with or welded to
the inside lining and shall be sloped or so arranged that all
drainage will be away from the product zone.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.3 Tank bridges shall be pitched to the outside of the
tank for complete drainage and shall have a raised rim of at
least 3/8 inch (10mm) where edges meet covers. Bridges shall
be installed so that the underside is readily accessible from
outside the tank.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.4 The exterior of processing tanks shall be of corrosion-resistant
material.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.5 If the lip
or edge of a tank, cover or bridge is rolled, the arc of roll
shall not exceed 180 degrees, and the returned
edge shall be at least 3⁄4 inch (20mm) from the adjacent
surfaces.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.6 Piping, valves, fittings and heat exchangers shall
conform to the applicable 3-A Sanitary Standards.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.7 Inlet, agitator shaft, or instrument openings in the
cover or bridge to which connections are not permanently attached
shall be raised at least 3/8 inch (10mm). Pipelines, agitator
shafts, or accessories entering through cover or bridge shall
be fitted with a sanitary umbrella that overlaps edges of openings.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.8 Discharge openings of the water inlet shall be located
at least 1 inch (25mm) or twice the diameter of the inlet pipe,
whichever is greater, above the flood level rim.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.9 Permanently installed inlet or outlet lines, or instrument
wells, through equipment sidewalls, shall be welded. Level sensors
installed on bottom or side shell should be flush type to avoid
contamination in recessed areas or removable to clean.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.10 Agitators permanently mounted are not required to
be removable if they do not interfere with drainage from the
tank and are readily accessible. If a support in the product
zone is necessary for the operation of an agitator, it shall
be of a packless bearing type and agitator or support shall be
readily accessible or removable.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.11 In totally enclosed tanks for the storage of liquid
ferment, a hooded air vent of not less than 3 square inches (58cm2)
in free open air shall be installed at the top of the tank. The
air vent shall be equipped with a perforated screen having openings
no greater than 1/16 inch (1.5mm) in diameter, or slots no wider
than 1/32 inch (0.8mm). All parts shall be readily accessible
and, except for the housing, shall be readily removable.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.12 Unless other comparable means of egress are provided,
a manhole shall be provided at the drainage end or side of the
tank. The dimensions of the manhole opening shall be not less
than 15 inches (380mm) vertical and 20 inches (500mm) horizontal,
or 18 inches (460mm) in diameter. The cover shall be of the inside-outside
swing-type and shall be readily removable.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.13 Pumps for liquid ferment shall meet the following
requirements:
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.13.1 Permanently joined surfaces with a total included
internal angle less than 135 degrees shall have a radius of not
less than 1/32 inch (0.8mm) tangential to both adjacent surfaces.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.13.2 Parts forming the space between the motor and the
pump body shall be constructed to be readily accessible and drain
freely.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.13.3 Shaft seals shall be readily removable.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.13.4 Either single service gaskets or readily removable
multi-use gaskets shall be used.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.13.5 Inlets, outlets, and impeller fastenings shall conform
to the principles of applicable 3-A Sanitary Standards.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.14 Liquid meters for liquid ferment shall conform to
the requirements of Section 4.26.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.15 Unless sealed to floor, cylindrical tanks standing
on end with a diameter greater than 72 inches (1.75 meters) shall
have a minimum clearance of 8 inches (200mm) from the floor.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.16 For pumps mounted on legs, the legs shall be smooth
with round ends and no exposed thread. Legs made of hollow stock
shall be sealed. On pumps with legs designed to be fixed to the
floor, the minimum clearance between the lowest part of the base
and the floor shall be 4 inches (100mm). When a pump is mounted
on a base, a minimum clearance of at least 2 inches (50mm) shall
be provided between the pump belly and the base. Readily portable
pumps not permanently attached shall have leg heights of not
less than 2 inches (50mm).
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.17 All exterior seams of the outer shell of tanks shall
be sealed by welding.
To
comment or make suggestions regarding this standard or begin
a new discussion on this standard click here.
4.20.2.18 All equipment, piping, and conduit in the liquid ferment
area shall be washed down.