Chapter . CLEANING AND PRESERVATION PROCEDURES FOR LONG TERM STORAGE

TM 38-260

CHAPTER 4

CLEANING AND PRESERVATION PROCEDURES FOR LONG TERM STORAGE

Section I. INTRODUCTION

4-1.

GENERAL

a. This chapter provides basic instructions for cleaning and preserving some common types of OPE and IPE

by various classification. It is divided into nine sections. The continuity of these sections is in the order that processing

generally will be performed. Paragraphs 4-34 through 4-37 cover sample scopes of work for two categories of storage,

stand-by-in-place and controlled humidity storage.

b. There will be times when either exotic or very complex items of plant equipment with numerical control (NC)

units will require cycling (exercising) during their tenure in storage. Whenever this occurs, separate scopes of work shall

be prepared to cover specific or unique situations for in-place storage.

c. When possible, processing for storage should be accomplished while the equipment is still connected to

power. This will, in most instances, reduce processing time and eliminate the necessity of running an auxiliary power line

to other processing areas.

d. Cleaning and preservation should be accomplished in one continuous operation. Any delay between the

two processes subjects the cleaned items to new contaminants, lest, and corrosion.

4-2.

CLEANING

a. A thorough cleaning is the first essential process in any effective preservation method. Improper cleaning

makes all subsequent preservation operations ineffective.

b. The conditions under which the equipment will be stored should not influence the degree of cleaning that

must be accomplished.

c. The type of equipment being processed determines the degree of cleaning required. For example,

equipment such as conveyors, furnaces, rough-type foundry equipment, and spray booths will not require the same

degree of cleaning that is necessary for precision-type plant equipment, such as metalworking machinery.

4-3.

PRESERVATIVES

The preservative materials are listed by '"P" numbers in the preservative compound chart in chapter 2, table

Other preservatives not classified as P-types are referenced in various sections.

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