4  SPECIFIC PRINCIPLES TO COVER EXCEPTIONS AND ADDITIONS TO THE DESIGN, CONSTRUCTION AND CLEANING OF ALL BAKERY EQUIPMENT, AS DEFINED IN SECTION 3.

4.40  DESIGN REQUIREMENTS FOR SUGAR WAFER, WAFER AND SUGAR ROLLED CONE BATTER SYSTEMS

4.40.1 Definitions

4.40.1.1 Sugar Wafer, Wafer, and Sugar Rolled Cone Batter Systems is that equipment used in the manufacture of the stated products and includes mixing, batter holding and batter distributing systems.

4.40.2 Specific Design Requirements

4.40.2.1 The batter holding and distributing systems shall use sanitary pipe and fittings, and be designed for cleaning in place (CIP) or take-apart cleaning. All components of the system shall be designed and constructed to facilitate drainage.

4.40.2.2 For jacketed tanks, 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.

4.40.2.3 Tank bridges shall be pitched to the outside of the tank for 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.

4.40.2.4 The exterior of processing tanks shall be of corrosion-resistant material.

4.40.2.5 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 ¾ inch (20mm) from the adjacent surfaces.

4.40.2.6 Piping, valves, fittings and heat exchangers shall conform to the applicable 3-A Sanitary Standards.

4.40.2.7 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.

4.40.2.8 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.

4.40.2.9 Permanently installed inlet or outlet lines, or instrument wells, through equipment sidewalls, shall be welded. Level sensors installed on the bottom or side shell should be flush type to avoid contamination in recessed areas or removable to clean.

4.40.2.10 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 the agitator or support shall be self-draining, and shall be readily accessible or removable.

4.40.2.11 Tanks other than those equipped with access covers shall be provided with a manhole. The manhole shall be provided at the drainage end or side of a tank. The cover shall be of the inside-outside swing type and shall be readily removable.

4.40.2.12 Pumps for wafer or cone batter shall meet the following requirements:

4.40.2.12.1 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.

4.40.2.12.2 Parts forming the space between the motor and the pump body shall be constructed to be readily accessible and shall drain freely.

4.40.2.12.3 Shaft seals shall be readily removable.

4.40.2.12.4 Either single service gasket or readily removable multi-use gaskets shall be used.

4.40.2.12.5 Inlets, outlets and impeller fastenings shall conform to the applicable 3-A Sanitary Standards.

4.40.2.13 Liquid meters for liquid ferment shall conform to the requirements of Section 4.26.

4.40.2.14 Unless sealed to the 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.

4.40.2.15 For pumps mounted on legs, the legs shall be smooth with 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).

4.40.2.16 All exterior seams of the outer shell of tanks shall be sealed by welding. Tanks located outdoors should have overlapped cladding and should not be continuously welded to handle thermal expansion.