General Information and Specifications
2-33
6036, 6042, 8042, 10042, 10054 31211015
3. The assembly process is one of the leading causes for
contamination in air and hydraulic systems.
Contamination can prevent proper tightening of fittings
and adapters from occurring.
a. Avoid using dirty or oily rags when handling fittings.
b. If fittings are disassembled, they should be cleaned
and inspected for damage. Replace fittings as
necessary before reinstalling.
c. Sealing compounds should be applied where
specified; however, care should be taken not to
introduce sealant into the system.
d. Avoid applying sealant to the area of the threads
where the sealant will be forced into the system.
This is generally the first two threads of a fitting.
e. Sealant should only be applied to the male threads.
f. Straight thread fittings do not require sealants.
O-rings or washers are provided for sealing.
g. When replacing or installing an o-ring, care is to be
taken while transferring the o-ring over the threads
as it may become nicked or torn. When replacing an
o-ring on a fitting, the use of a thread protector is
recommended.
h. When installing fittings with o-rings, lubrication
shall be used to prevent scuffing or tearing of the
o-ring. Refer to Section 2.9.17, “O-ring Installation
(Replacement),” for procedure.
4. Take care to identify the material of parts to apply the
correct torque values.
a. Verify the material designation in the table headings
b. If specifications are given only for steel fittings and
components, the values for alternate materials shall
be as follows:
Aluminum and Brass - reduce steel values by 35%
Stainless Steel - Use the upper limit for steel.
5. To achieve the specified torque, the torque wrench is to
be held perpendicular to the axis of rotation.
6. Refer to the appropriate section in this manual for more
specific instructions and procedures for each type of
fitting connection.
2.9.2 Assembly Instructions for American
Standard Pipe Thread Tapered
Connections
1. Inspect components to ensure male and female port
threads are free of rust, splits, dirt, foreign matter, or
burrs.
2. Apply a suitable thread sealant, such as Loctite 567, to
the male pipe threads if not already applied. Ensure the
first 1 to 2 threads are uncovered to prevent system
contamination.
3. Assemble connection hand tight.
4. Mark fittings, male and female.
5. Rotate male fitting the number of turns as per below
mentioned table. Refer to Section 2.9.15, “FFWR and
TFFT Methods,” for procedure.
Note: TFFT values provided in below mentioned table are
applicable for the following material configurations:
a. Steel fittings with steel mating components
b. Steel fittings with aluminum or brass mating
components
c. Aluminum or brass fittings with steel mating
components
d. Aluminum or brass fittings with aluminum or brass
mating components.
NOTICE
Over tightening may cause deformation of the pipe
fitting and damage to the joining fitting, flange or
component may occur.
NOTICE
Never back off (loosen) pipe threaded connectors to
achieve alignment. Meet the minimum required turns
and use the last turn for alignment.
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