MS for mechanical piping system installation work

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 weld

Installation Mechanical Piping:

A PPR Pipes & Fittings Installation

B uPVC Pipes & Fittings Installation

C Cast Iron Pipes & Fittings Installation

E Steel Pipes & Fittings Installation

F Copper Pipes Installation.

Scope of Works:

This method statement covers work related to all Mechanical works of the

Installation:

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

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)

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

Table2: The saddles data

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

Positioning of heating element

Divide the machine slide, remove heating element

Join the pipe, cool down under pressure

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 rodAnchorConcrete Slab

PP-R Pipe

SleeveWallPipe clamp

Detail of exposed horizontal PP-R pipe installation

Hanger rodConcrete

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 (t) mm Depth

InletPP-R Pipe

PP-R PipeCutting line

Detail of concealed PP-R pipe installation.

B uPVC Pipes & Fittings Installation:

1 Adhesive Bonding Joint For uPVC Pipes and Fititng

2 Pipe installation

a Exposed pipes:

uPVC PipeHanger rodAnchorConcrete Slab

SleeveWall

Pipe clampuPVC Pipe

b Concealed pipes:

Table 4: Wall Opening Following Pipe Size

Item Pipe size (d) Opening (b) mm Depth (t) mm

uPVC PipeCutting lineConcrete slab

uPVC pipe

Mortar

Hold pipe

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

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

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

D Ductile Iron Pipes and Fittings Installation

D.I PipeFlange

D.I PipeBolt and Nut

Detail Flange joint of D.I Pipe with Pipe

D.I Fittng

FlangeD.I Pipe

Bolt and Nut

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 thread

Washout Threads

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:

9 (16.3) 8¼ (19.0) 9¼ (21.4) 9¼ (21.4) 11⅛ (25.7)

7 (12.7) 7¾ (14.1)

7 (16.2)

8 (18.5)

8 (18.5)

6 (8.0) 5¾ (10.4) 6½ (11.7) 5¾ (13.3) 6¾ (15.6) 6¾ (15.6)

8⅝

(19.9)

Hanger rodAnchorConcrete Slab

Pipe clampSteel 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

Hanger rodAnchorConcrete Slab

SleeveSteel Pipe

Steel Fittng

U-bolt

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

Main pipe

Seam weld (see table 6)

Detail of welding joint for branch pipe

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 Flux

D = 8 - 15 mm: about 3 mm

D = 5/8B, 20 - 32 mm: about 5 mm

Detail for Application of Flux

* Diameter of solder is 2mm If other diameter is used, Change the length in

SolderFlame

Solder must be melted by the heat of surface

Apply solder to opposite side of heated position