Page 52 - Microsoft Word -Cow Book 10-06-09 final update.doc

Other materials acceptable for contact surfaces are;
1)_____________________,
2)_____________________, and
3)________________________________________. Further, the 3-A Sanitary
Standards require these surfaces have a finish at least as smooth as _______
ground finish on stainless steel sheets.

The farm milk cooling tank standards provide specifications for different types of
tanks, installation, protection of the product therein, measuring device require-
ments and cooling requirements.

Items 10p and 11p of the PMO provide construction requirements for milk contact
surfaces and CIP circuits. Generally, all equipment which meets 3-A Sanitary
Standards and has been awarded the 3-A Symbol complies with the
sanitary design and construction requirements of the PMO.

A milk contact surface has been defined as all surfaces which are exposed to the
product and surfaces from which contaminants may _______, ___________, or
___ __________ into the product.

Inspectional areas of emphasis or special problem areas may be:

1. Rough welds, corrosion in milk contact surfaces.

2. Use of barbed "t's" in milk or CIP lines.

3. Inadequate inspection access points on milk lines. By-passes around plate or
tubular coolers.

4. Improperly installed milk lines, milk receivers and sanitary traps. The vacuum
line connecting the milk receiver to the trap should be installed in accordance
with the 3-A Standard Number 606-##. This trap must be installed adjacent to
the milk receiver and connected by readily disassembled sanitary piping. The
vertical rise of this connection shall not exceed 12 inches including the elbow
and shall slope toward the trap at least 2 inches in the first 2 feet. The
purpose of this configuration is to prevent any liquid collected in the trap from
getting into the milk receiver.

5. Use of unapproved materials in milk or cleaning circuits, i.e., radiator hose,
PVC or galvanized piping, duct tape, etc.

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