Method Statement: System: Air Condition & Ventilation
Method Statement: System: Air Condition & Ventilation
Method Statement: System: Air Condition & Ventilation
PM6.10_E
Rev. 1
Issued 12/1/53
METHOD STATEMENT
ON
REFRIGERANT PIPE AND FITTING INSTALLATION
1. GENERAL
The document describes the installation for the Refrigerant Pipes and Fittings, and consists of meterials, equipment
& tools, working procedure and installation flow - chart. Detail of the procedure contained herain may be modified based on the
actual site condition.
2. MATERIALS
Copper Pipes
3. Equipment & Tools
3.1 Oxyfuel Gas Equipment
3.2 Tube Cutter
3.3 Tube Bender
3.4 Flaring Tool
3.5 Vacuum Pump
3.6 Manifold Gaupe
3.7 Spirit Level
3.8 Hammer
3.9 Pliers
3.10 Step Ladder
4. WORKING PROCEDURE
4.1 Preparation
* Pipe material should be dept at dry & clean place
* If pipe is not dirty then can be installed, If pipe is dirty, clean the internal and external surface to
reasonable free from other foreign material.
Cutting
* Use tube cutter for cutting and ream the cutting edge.
4.2 Jointing
* Brazing joint method shall be used for refrigerant pipe connection, except other connection method
are required by equipment, valve and accessory
5. QUALITY CONTROL
Quality control works should be performed in the particular works as described in the following
5.1 Pipeline dimension & level
* Pipeline dimension and level of refringerant pipe should be performed in accordance with approved shop
drawing.
5.2 Nitrogen gas pressure test
* Nitrogen gas pressure test of refrigerant pipe (for DX system) should be performed in accordance
with inspection.
5.3 Flushing & Vacuum
* Refrigerant pipe flushing & vacuum shall be done after connected to DX units.
* Details for flushing & Vacuum will be descriced in method statement of split type unit installation.
Page : 1/4
METHOD STATEMENT
PM6.10_E
Rev. 1
Issued 12/1/53
START
MEASURING
CUT THE TUBE END SQUARE
REAMING
CLEANING THE TUBE IF SOLED
OR EXCESSIVE OXIDE HAS BUILD UP
ASSEMBLING FITTING AND
HEAZING THE ASSEMLY
UNIFORMLY
BRAZING
END
Page : 2/4
METHOD STATEMENT
PM6.10_E
Rev. 1
Issued 12/1/53
STAR
PROVIDE SERVICE VALVE FOR TESTED PIPEAND
CONNECT OT N2 CYLINDER VIA
RECORD TEMPERATUPE
PREPRESSURIZE TESTED PIPE TO 300 kPa HOLDING
RECTIFY THE
LEAKGE POINT
NO
FIND LEAKAGE
POINT BY LIQUID
NO
YES
RECTIFY THE
LEAKGE POINT
Page : 3/4
METHOD STATEMENT
PM6.10_E
Rev. 1
Issued 12/1/53
ITEM
DESCRIPTION
SATISFIED
Materials
Copoer Pipe
2
2.1
2.2
2.3
REMARKS
STATUS
UNSATISFIED
START (kPa)
END (kPa)
Note : _______________________________________________________________________________________
_________________________________________________________________________________________________
_________________________________________________________________________________________________
Inspected by :
Signature : ________________
Name : ____________________
Date : ___________________
Approved by :
Signature : ________________
Name : ____________________
Date : ___________________
Page : 4/4