1. Saigon M&C Tower Project
Method Statement For Fire Stopping
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 -.-.- L.Q.K J.R.P
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2. Saigon M&C Tower Project
Method Statement For Fire Stopping
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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3. Saigon M&C Tower Project
Method Statement For Fire Stopping
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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4. Saigon M&C Tower Project
Method Statement For Fire Stopping
Joining and fixing
Pipe and fitting are aligning
Table1: The fusion data.
Pipe external - d Welding depth Heating time Welding time Cooling time
(mm) (mm) (sec) (sec) (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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5. Saigon M&C Tower Project
Method Statement For Fire Stopping
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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6. Saigon M&C Tower Project
Method Statement For Fire Stopping
Table2: The saddles data.
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7. Saigon M&C Tower Project
Method Statement For Fire Stopping
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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8. Saigon M&C Tower Project
Method Statement For Fire Stopping
Positioning of heating element
Divide the machine slide, remove heating element.
Join the pipe, cool down under pressure.
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9. Saigon M&C Tower Project
Method Statement For Fire Stopping
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
Concrete Slab
Anchor
Hanger rod
PP-R Pipe
Pipe clamp
Sleeve
Wall
Detail of exposed horizontal PP-R pipe installation
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10. Saigon M&C Tower Project
Method Statement For Fire Stopping
Concrete
Slab
Anchor
Hanger rod
Sleeve Pipe clamp
PP-R Pipe
Support Sleeve
PP-R Pipe
Concrete Wall
Slab
Detail of exposed vertical PP-R pipe installation
Picture for illustrating of PP-R Pipes installation
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11. Saigon M&C Tower Project
Method Statement For Fire Stopping
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
Pipe size Opening Depth
Item
(d) mm (b) mm (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
PP-R Pipe Cutting line
inlet
PP-R Pipe
Inlet
PP-R Pipe
PP-R Pipe
Cutting line
Backfill
(by other)
End cap
PP-R Pipe (cover)
outlet
Detail of concealed PP-R pipe installation.
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12. Saigon M&C Tower Project
Method Statement For Fire Stopping
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
Zero point
Stopper
PVC socket PVC pipe
Swell layer by Adhesive
(0.1-0.2 mm)
PVC socket PVC pipe
Detail of Installation uPVC fitting
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13. Saigon M&C Tower Project
Method Statement For Fire Stopping
2. Pipe installation
a. Exposed pipes:
Concrete Slab
Anchor
Hanger rod
uPVC Pipe
Fitting
U-bolt Pipe clamp
uPVC Pipe Sleeve
Sleeve
Wall
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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14. Saigon M&C Tower Project
Method Statement For Fire Stopping
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
Concrete slab Concrete slab
Cutting line
Cutting line
uPVC Pipe
Wall
uPVC Pipe
& Fitting
End cap
(cover)
Backfill Wall
(by other)
Drain Drain
Detail for Concealed of uPVC pipes
End cap
uPVC pipe
Mortar
Hold pipe
Picture for illustrating
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15. Saigon M&C Tower Project
Method Statement For Fire Stopping
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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16. Saigon M&C Tower Project
Method Statement For Fire Stopping
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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17. Saigon M&C Tower Project
Method Statement For Fire Stopping
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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18. Saigon M&C Tower Project
Method Statement For Fire Stopping
D. Ductile Iron Pipes and Fittings Installation
Bolt and Nut Flange
D.I Pipe
D.I Pipe
Detail Flange joint of D.I Pipe with Pipe
Bolt and Nut
D.I Pipe Flange
Rubber rope
D.I Fittng
Detail Flange joint of D.I Pipe with Fitting
D.I Pipe
Concrete Slab
Anchor
Sleeve Hanger rod
U-bolt
Flange
D.I Fittng
D.I Pipe
Angle Steel
Detail for Installation D.I pipe
.
Some picture for illstrating
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19. Saigon M&C Tower Project
Method Statement For Fire Stopping
E. Steel Pipes and Fittings Installation
1. Screw Joint: For pipes size less than 65A
Useful thread
(see note 1)
Washout Useful thread
Threads A (see table 5)
End face of internally
thread 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 Internal thread with Internal thread with extreme
designation extreme plus tolerance Internal thread of basic size minus tolerance
(gauge diameter)
(maximum diameter) (minimum diameter)
mm mm mm
1/16 8⅛ 6⅞ 5⅝
(7.4) (6.2) (5.1)
1/8 8⅛ 6⅞ 5⅝
(7.4) (6.2) (5.1)
1/4 8¼ 7 5¾
(11.0) (9.3) (7.7)
3/8 8½ 7¼ 6
(11.4) (9.7) (8.0)
1/2 8¼ 7 5¾
(15.0) (12.7) (10.4)
3/4 9 7¾ 6½
(16.3) (14.1) (11.7)
1 8¼ 7 5¾
(19.0) (16.2) (13.3)
1¼ 9¼ 8 6¾
(21.4) (18.5) (15.6)
1½ 9¼ 8 6¾
(21.4) (18.5) (15.6)
2 11⅛ 9⅞ 8⅝
(25.7) (22.8) (19.9)
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20. Saigon M&C Tower Project
Method Statement For Fire Stopping
Concrete Slab
Anchor
Hanger rod
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
More than t
Flange
X: (mm)
Pipe thickness
Weld point
t (mm)
Steel Pipe
1mm shorter than X
Details of welding Joint for Flange
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21. Saigon M&C Tower Project
Method Statement For Fire Stopping
Steel Pipe
Concrete Slab
Anchor
Sleeve Hanger rod
Welding U-bolt
point
Steel Fittng
Steel Pipe
Angle Steel
Detail Installation welding pipes
3. Welding joint for branch pipes: For pipe size less than 65A.
Table 6. Saddle fitting connection combination
Branch pipe diameter Main pipe diameter Ø (mm)
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 Spot weld
(see table 6) Saddle fitting
Main pipe Main pipe
1. Making and Cut hole 2. Insert saddle and Spot weld
Branch pipe
Saddle fitting
Branch pipe
Seam weld
Main pipe Main pipe
3. Welding for certain 4. Insert branch pipe by screw
Detail of welding joint for branch pipe.
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22. Saigon M&C Tower Project
Method Statement For Fire Stopping
F. Copper Pipes and Fittings Installation
1. Application of Flux and Insert
No applicaion area of Flux
D = 8 - 15 mm: about 3 mm
D = 5/8B, 20 - 32 mm: about 5 mm
Copper pipe Copper pipe
Flux must apply only joint area
Too much Flux cause pipes to corrosion
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.
Flame
Copper pipe Copper pipe
Solder
Solder must be melted by the heat of surface.
Apply solder to opposite side of heated position.
Detail for Application of Solder
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