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Installation Mechanical Piping:
A. PPR Pipes & Fittings Installation.
B. uPVC Pipes & Fittings Installation.
C. Cast Iron Pipes & Fittings Installation.
D. Ductile Iron Pipes & Fittings Installation.
E. Steel Pipes & Fittings Installation.
F. Copper Pipes Installation.
- 12-03-09 FIRST ISSUE C.T.P -.-.- J.R.P L.Q.K
Saigon M&C Tower Project Method Statement For Fire Stopping
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General: Items: - The Method Statement For Mechanical Piping System Installation
Work.
Aim: The objectives is to describe Plumping works associated with installation of
internal pipes in compliance with the contract specification, approved shop
drawings, combine and coordinated all services and structural penetration shop
drawings.
Scope of Works: This method statement covers work related to all Mechanical works of the
SAIGON M&C TOWER Project.
Installation:
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A. PPR Pipes & Fittings Installation: 1. Adhesive Bonding Joint For PP-R Pipes and Fititng
a. Cutting of the pipe
- Mark pipe according to the necessary length.
- Cutting the pipe follow the marking. Cut the pipe at right angles to the pipe
axis.
Cutting of the pipe
b. Heating of pipe and fitting
- Push the end of the pipe up to the welding depth into the welding tool.
- After the stipulated heating times quickly remove pipe and fitting from the
welding tool (See table 1).
- Join them immediately until the marked welding depth is covered by the PP-R
bead from the fitting.
Heating-up of the pipe and fitting
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Joining and fixing
Pipe and fitting are aligning
Table1: The fusion data.
Pipe external - d
(mm)
Welding depth
(mm)
Heating time
(sec)
Welding time
(sec)
Cooling time
(min)
16 13 8 4 2
20 14 8 4 2
25 15 11 4 2
32 16.5 12 6 4
40 18 18 6 4
50 20 27 6 4
63 24 36 8 6
75 26 45 8 8
90 29 60 8 8
110 32.5 75 10 8
125 40 90 10 8
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c. Weld in saddles
- Weld in saddles are available for pipe outer diameter of 40, 50, 63, 75, 90,
110, 125, 160, 200 and 250 mm. The maximum sensor well diameter is
specified in the following table 2.
- Weld in saddles are used for:
• Branch connections in existing installations.
• The substitution of a tee.
• Branch connections in risers.
• Sensor wells, etc.
Weld-in saddle detail.
- Drill through the pipe wall at the intended outlet point by using the drill.
- Insert the heating tool on the concave side of the weld-in saddle tool into the
hole drilled in the pipe wall until the tool is completely in contact with the outer
wall of the pipe
- Fusing the weld-in saddle with the pipe the outer surface and the pipe inner
wall the connection reaches highest stability.
Drilling through the pipe wall
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Table2: The saddles data.
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The welding tool is inserted into the pipe wall … … heating-up of the elements
Joining Weld-in saddle finished
d. Butt welding
Pipes and fittings are fused, as explained below by butt welding ( pipe
dimension 160, 200, and 250mm).
- Cut pipe into required length
- Plastic pipes are aligned and fixed by means of the clamping elements
- Push The pipes onto the heating place with a defined adjusting pressure.
- When heating time has expired, divide the machine slide, remove heating
element quickly and join the pipes (by putting both parts of the slide together).
- The welded connection can be unclamped the welding process is finished.
The parts to be welded are fixed and aligned respectively
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Positioning of heating element
Divide the machine slide, remove heating element.
Join the pipe, cool down under pressure.
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e. Repair
- Damaged pipes may be repaired by mean of fusion.
- In addition to this the offers the possibility of the pipe repair stick.
- The installation: same step for weld-in saddle.
Heat-up Install repair stick and cutting
2. Pipe installation
a. Exposed pipes
Hanger rod
Anchor
Concrete Slab
PP-R Pipe
Sleeve
Wall
Pipe clamp
Detail of exposed horizontal PP-R pipe installation
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Hanger rod
Concrete
PP-R Pipe
Sleeve
Wall
Anchor
PP-R Pipe
SleeveSupport
Slab
Pipe clamp
ConcreteSlab
Detail of exposed vertical PP-R pipe installation
Picture for illustrating of PP-R Pipes installation
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b. Concealed pipes
- Mark location of pipes and outlet on walls according to approved shop drawings.
- After layout has been established, marking the pipes route on the brick wall with
two marked lines according to installed pipes size (Follow table 3).
Table 3: Wall Opening Size for PP-R Pipes
Item Pipe size (d) mm
Opening (b) mm
Depth (t) mm
1 20 60 35 2 25 60 35 3 32 100 45 4 40 100 50 5 50 150 65 6 60 150 80
Cutting line
Backfill
PP-R Pipeoutlet
PP-R Pipe
(by other)
PP-R Pipeinlet
End cap(cover)
InletPP-R Pipe
PP-R Pipe
Cutting line
Detail of concealed PP-R pipe installation.
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PP-R Pipe
Cutting line
Mortar hole pipe
Outlet and End cap
Picture for illustrating of concealed PP-R pipe installation.
B. uPVC Pipes & Fittings Installation:
1. Adhesive Bonding Joint For uPVC Pipes and Fititng
Stopper
PVC socket PVC pipe
Zero point
PVC socket PVC pipe
Swell layer by Adhesive(0.1-0.2 mm)
Detail of Installation uPVC fitting
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2. Pipe installation
a. Exposed pipes:
uPVC Pipe
Hanger rod
Anchor
Concrete Slab
Sleeve
Wall
Pipe clampuPVC Pipe
Sleeve
U-bolt
Fitting
Detail of exposed uPVC pipe installation
uPVC Pipe
Fitting
Pipe clamp
uPVC pipe
Support
Rubber rope
Pipe strap
Picture for illustrating of exposed uPVC pipes installation
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b. Concealed pipes:
Table 4: Wall Opening Following Pipe Size Item Pipe size (d) Opening (b) mm Depth (t) mm
1 32A 100 45 2 40A 100 50 3 50A 150 65 4 80A 200 100 5 100A 200 120
Cutting line
Backfill
uPVC Pipe
(by other)
End cap(cover)
uPVC Pipe
Cutting line
Concrete slab
Wall
& Fitting
Drain Drain
Concrete slab
Wall
Detail for Concealed of uPVC pipes
End cap uPVC pipe
Mortar Hold pipe
Picture for illustrating
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C. Cast Iron Pipes and Fittings Installation
1. Cutting of Pipe
- All cutting must be done in warehouse or in designated areas at each floor. All
cutting must not be done at work area.
- Cutting angle must be right angle.
- Pipe shall be cut by power hacksaw, circular cutting machine with abrasive wheel,
hand hacksaw or square end sawing vice only.
- Inside edges shall be reamed smooth by reamer or sand paper.
Example for Cutting pipes
2. Coupling Joint
a. Pipe with Pipe
1. Push the supplied complete connector on to the pipe
end right up to the middle spacing ring of the seal.
2. Turn over the open half of the sealing collar.
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3. Install the next pipe or formed part flush with the spacing
ring and fold back the turned over half of the collar.
4. Place the clamping sleeve around the collar.
5. Alternatively tighten the two clamping screw uniformly
and hard tight. The guiding and threaded plates of the
clamp must come together parallet to avoid any
deformations.
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b. Pipe with Fitting
1. Push the supplied complete connector on to the pipe
end right up to the middle spacing ring of the seal.
2. Push the pipe end from the other end into the connector.
3. Firmly tighten the hexagon socket screw with a socket
spanner, hard ratchet or impact screwdriver, if possible to the
point where the two clamping jaws come together.
Picture for illustrating install complete
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D. Ductile Iron Pipes and Fittings Installation
D.I PipeFlange
D.I Pipe
Bolt and Nut
Detail Flange joint of D.I Pipe with Pipe
D.I Fittng
FlangeD.I Pipe
Bolt and Nut
Rubber rope
Detail Flange joint of D.I Pipe with Fitting
Flange
D.I Pipe
Hanger rod
Anchor
Concrete Slab
Sleeve
D.I Pipe
D.I Fittng
U-bolt
Angle Steel Detail for Installation D.I pipe
.
Some picture for illstrating
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E. Steel Pipes and Fittings Installation 1. Screw Joint: For pipes size less than 65A
Useful thread(see note 1)
A (see table 5)Useful threadWashout
Threads
End face of internallythread parts
Useful thread(see note 1)
A (see table 5)
Note 1: The useful thread of the internally threaded part is to be not less than 80% of the length.
Detail of Screw
Table 5: Size of Screw (BS 21:1985) Minimum lengths A in turns of thread (see note) for:
Thread size designation
Internal thread with extreme plus tolerance (maximum diameter)
Internal thread of basic size (gauge diameter)
Internal thread with extreme minus tolerance
(minimum diameter)
1/16
1/8
1/4
3/8
1/2
3/4
1
1¼
1½
2
mm 8⅛
(7.4)
8⅛ (7.4)
8¼ (11.0)
8½ (11.4)
8¼ (15.0)
9 (16.3)
8¼ (19.0)
9¼ (21.4)
9¼ (21.4)
11⅛ (25.7)
mm 6⅞
(6.2)
6⅞
(6.2)
7 (9.3)
7¼ (9.7)
7 (12.7)
7¾ (14.1)
7 (16.2)
8 (18.5)
8 (18.5)
9⅞ (22.8)
mm 5⅝ (5.1)
5⅝
(5.1)
5¾ (7.7)
6 (8.0)
5¾ (10.4)
6½ (11.7)
5¾ (13.3)
6¾ (15.6)
6¾ (15.6)
8⅝ (19.9)
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Hanger rod
Anchor
Concrete Slab
Pipe clamp
Steel pipe
Steel fitting Detail installation for thread steel pipe and fitting
2. Welding Joint: For pipes size 65A and over
Bevel angle
Pipe thickness
Distance between Pipes Detail for Chamfer of groove weld
Weld point
Pipe thickness
Details Finish of welding seam
Flange
Weld point
Steel Pipe1mm shorter than X
t (mm)
X: (mm)
Pipe thickness
More than t
Details of welding Joint for Flange
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Welding
Hanger rod
Anchor
Concrete Slab
Sleeve
Steel Pipe
Steel Fittng
U-bolt
Angle Steel Steel Pipe
point
Detail Installation welding pipes
3. Welding joint for branch pipes: For pipe size less than 65A.
Table 6. Saddle fitting connection combination
Main pipe diameter Ø (mm) Branch pipe diameter Ø (mm) 40 50 65 80 100 125 150 Hole size Ø (mm)
15 27 20 33 25 40 32 48 40 54 50 o 66
o: to limit used : to allow used
Hole on pipe
1. Making and Cut hole 2. Insert saddle and Spot weld
Saddle fitting
3. Welding for certain
Main pipe
Branch pipe
Saddle fitting
Spot weld
4. Insert branch pipe by screw
Main pipe
Branch pipe
Main pipe
Main pipe
Seam weld
(see table 6)
Detail of welding joint for branch pipe.
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F. Copper Pipes and Fittings Installation
1. Application of Flux and Insert
Flux must apply only joint areaToo much Flux cause pipes to corrosion
No applicaion area of FluxD = 8 - 15 mm: about 3 mmD = 5/8B, 20 - 32 mm: about 5 mm
Copper pipe Copper pipe
Detail for Application of Flux
2. Application of Solder
Table 7. Necessary Length of Solder
Pipe Size 8 10 15 5/8B 20 25 32
Necessary Length (mm) 6 8 13 22 30 60 90
Maximum Length (mm) 8 12 19 32 42 82 123
* Diameter of solder is 2mm. If other diameter is used, Change the length in
accordance with this table.
Copper pipe Copper pipe
Solder
Flame
Solder must be melted by the heat of surface.Apply solder to opposite side of heated position.
Detail for Application of Solder