Flowstopping System

Large Diameter Bagtube

SYSTEM 3 LARGE DIAMETER BAGTUBES

The large diameter bagtubes provide a safe and effective method for flowstopping 14” to 48” diameter gas mains.

This flowstopping system has been designed for multi-functional applications. Large diameter metallic flowstopping 14”-24”. PE flowstopping 350mm-630mm.

Large diameter bagtubes are a safe, easy-to-use, fast and cost-effective flowstopping system for maintenance, repair and modification of distribution networks whilst preserving continuity of supply. The entire procedure is totally gas-free, carried out through an arrangement of valves.

Laminar supplies the complete package, including drilling machines, plug insertion equipment, flowstopping bagtubes and bags. The aluminum construction reduces weight and makes the flowstopping equipment easily transported and positioned on to the gas main.

Description

System Parameters

14” to 48” diameter mains
Maximum operating pressures dependent on main size
Ideal for use with the ALH Bond & Bolt saddle system
Flow rate up to 5 meters per second
Lightweight aluminum construction
Strong bags for additional safety (GIS/E20)

Bond & Bolt Flowstopping

The 24” to 36” bagtube can be used in conjunction with the Bond & Bolt saddle to carry out flowstopping operation. This combination can hugely reduce excavation time and labor costs, ensuring minimal disruption to the public and a very safe working environment for the operators.

Large Diameter PE Flowstopping

The large diameter Bagtube system offers an alternative to squeeze-off on polyethylene (PE) mains. On PE mains, bag insertion is via an electro-fused branch saddle, which can be permanently plugged so that the entry valve can be removed after the operation.

Flowstopping Bags

The E20A semi-supported bag provides a gas-free secondary seal for large diameter flowstopping system. The bag has a bladder construction conforming to GIS/E20 specification.

It is made from triple-layer calendared dry natural rubber sheet, with a high tenacity unproofed nylon cover. The bag incorporates an extended neck and a backbone, which enhance protection and eliminates the risk of ‘twisted bladder’.

SYSTEM 3 DRILL & TAP (PNEUMATIC)

System 3 has a two-stage air motor for high speed drilling and low speed tapping.

Drill and Tapping

Pneumatic motor
Two-speed, high speed drilling and low speed tapping (340Nm torque)
3”-6” (BSP Thread)
3”-5” (NPT Thread)

SYSTEM 3 DRILLING MACHINE (HYDRAULIC)

System 3 drilling machine with hydraulic power pack offers total gas free drilling in live mains operating at up to 2bar (30psi). The drilling machine is fitted with a hydraulic unit allowing smooth & safe drilling operation, hole sizes vary from 2 ½” to 6”.

Features