ABS METHOD

OVERVIEW OF AIR-BAG STOPPER METHOD

ABS

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⌀100

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⌀200

The Air-Bag Stopper Method (ABS Method) is a simple method developed for temporarily shutting down water pipeline by inserting an inflated air-bag through a drilled pipe via a saddle.

The ABS Method enables shutting down water pipeline at minimal section within a short time of period. The method also enables water suspension-free construction to carry out through a whole pipeline construction series, rather than individually separating construction phases.

There are two types of approaches for applying ABS Method, depending on the saddles;

Method Type 1／With a self-developed stopper-saddle made specifically for ABS Method

Method Type 2／With commercially available ferrule with a saddle

Component Image for Method Type 1

PROCEDURE

ABS CONSTRUCTION PROCEDURE

ABS METHOD TYPE 1

STEP 1

STEP 1-1

Mount a saddle onto a target pipeline.

STEP 1-2

Fix the pipeline with retainers and spiles.

STEP 1-3

Place a ball valve onto the saddle.

STEP 2

STEP 2-1

Drill a hole and check the water pressure.

STEP 2-2

Insert the air-bag into the pipe inflate to shut down the water.

STEP 2-3

When over with the pipeline construction, deflate air from the air-bag and let the water flow. Pullout the device.

STEP 3

STEP 3-1

Set a plug onto a stopper saddle with a mounting machine.

STEP 3-2

Tighten the plug nut, after removing the mounting machine and the ball valve.

STEP 4

STEP 4-1

Remove the retainers and spiles. Fix a cover onto the saddle.

*Please read the instruction manual when operating the ABS Method.

ABS METHOD TYPE 2

STEP 1

STEP 1-1

Mount a saddle onto a target pipeline.

STEP 1-2

Fix the pipeline with retainers and spiles.

STEP 2

STEP 2-1

Drill a hole and check the water pressure.

STEP 2-2

Insert the air-bag into the pipe inflate to shut down the water.

STEP 2-3

When over with the pipeline construction, deflate air from the air-bag and let the water flow. Pullout the device.

STEP 3

STEP 3-1

Remove the retainers and spiles. Fix a cover onto the saddle.

*Please read the instruction manual when operating the ABS Method.

EXAMPLE WORKS

CONSTRUCTION SITES ABS METHOD WAS APPLIED

T-City・φ100 ductile iron pipe

PIPE LEAKAGE REPAIR
K-Town・φ125 ACP

PIPELINE RENEWAL
M-City・φ100 PVC pipe

GATE VALVE REPLACEMENT
T-City・φ100 ductile iron pipe

DISASTER RESORATION
K-CITY・φ6″ ductile iron pipe

PIPELINE RELOCATION
S-City・φ100 ductile iron pipe

PIPE RELOCATION

INTRODUCTORY MOVIE

AN INTRODUCTION MOVIE OF ABS METHOD

STOPPER SADDLE

STOPPER SADDLE DESIGNED FOR ABS METHOD

FEATURES

FEATURES OF THE STOPPER SADDLE

The stopper saddle is specifically designed and developed for the ABS Method.

Small protrusions／ The protrusions of the saddle is at its minimal size. Less chance of damaging when re-digging.

Anti-corrosive at hole portion／ Plug gasket will adhesively contact to the hole portion. Hence, it will prevent the chance of corrosion。

Reinforcement of ACP／ As the saddle is widely designed, inner circumferential saddle gasket further protects the pipe.

No.	1	2	3	4	5	6	7	8	9	10	11	12
ELEMENT NAME	Saddle	Band	Saddle Gasket	Hole Gasket	T-Slot Bolt	Nut	Cover	Cover Gasket	Plug	Plug Gasket	Plug Holder	Plug Nut
MATERIAL	FCD 450-10	FCD 450-10	SBR	SBR	Alloy Ductile Iron	Alloy Ductile Iron	FCD 450-10	SBR	Alloy Ductile Iron	SBR	Alloy Ductile Iron	SUS 304