ON-LINE LEAK SEALING

ON-LINE LEAK SEALING PERFORMED
ON VALVES & PIPELINES (UNDER PRESSURE
LIKE SEALING)

We provide a 24-hour, 365-day-a-year service for live sealing and repair of leaks under pressure. This service is applicable to piping, flanged and threaded joints, valves, etc., within a temperature range from cryogenic up to 900°C, and pressures from vacuum up to 400KG/cm². We specialize in sealing and leak repair. We have manufacturing and machining facilities. The advantage of this service is that we can provide an adequate response to emergency situations.

Sealing as a Key Product

A wide range of sealing and valve packing materials is required to repair leaks at temperatures of up to 900°C. Therefore, the selection of materials that are compatible with the processes is critical. We use JETLUBE asbestos-free sealants, as a product that poses no health risk.

Special Adhesives

In locations where welding is not permitted, our technicians can use a prodcedure that involces applying adhesive sealants. In these cases where an adhesive solution is applied, the use of a gland box becomes unnecessary. These adhesives, this are long-lasting and safe, are highly effective for operations such as:
- Reinforcement of tank nozzles
- Couplings and weld-o-lets
- Tanks
- Vaccum leaks
- Fiberglass pipes
- Thermo-wells

Valve Sealing

Ensuring leak-tightness and internal pressure control in valves, connections and surface pipelines of various diameters, without altering mechanical operating conditions of pressure variations. On-line valve leak repairs not only reduce operational costs by preventing product loss but also eliminate accident risks and improve noise levels. Leaks in the pressure joints of valve bonnets pose a complex challenge due to the variety of designs. We repair valves with seat leaks when the valve is closed, as well as pressured-sealed bonnets. When the valve body leaks due to a crack or rupture, the repairs are carried out by placing a clamp or encapsulation and injecting a sealant compatible with the system. It is also possible to install a gland box around the entire valve, allowing it to continue operating after the repair is completed, or to seal it off, rendering it inoperative and permanently sealed.

Valve Repacking

We have a high level of specialization in repacking all types of valves while in operation, by injecting packing compatible with conventional packing materials. The result is full operability of the valve with a complete packing seal, allowing for possible operation of the gland follower. Our valve repacking technique can be applied during both shutdown and running conditions and is performed in a very short time. The use of special lubricants allows for smooth stem movement, and the tapered threading of the injection valve ensures compliance with applicable codes and standards.

Pipe and Fitting Repairs

Pipes and fittings are potential sources of leaks, which can be caused by internal or external corrosion and/or erosion, cyclic pressure variations, or thermal shock stress at the joints. We offer a standard line of encapsulation solutions, along with clamps and retaining rings, all designed for specific applications and manufactured in our workshop. In cases requiring machining, we have semi-finished clamp sets that only require final processing, allowing us to complete a leak repair within 24 to 72 hours from the time of the service call. A typical list of encapsulations includes:
- 90 and 45 elbows
- Unions
- Couplings
- Straight sections
- Flanges, etc.

Rotating Equipment Repairs

Leaks in the packing and joints of rotating equipment are repaired while in operation. These repairs require experienced personnel to successfully execute the task and ensure a high level of safety. Our technicians have the experience and technology at their disposal and work in coordination while engineering staff achieve the highest safety standards in the repair process. Our scope of work includes leak repairs on the following equipment:
- Gas turbines
- Steam turbines
- Pumps
- Compressors, etc.

Expansion Joint Repair

Expansion joints are repaired using retaining rings with injection ports and/or special adhesives that allow the joint to continue functionality normally. Both engineering and manufacturing technicians, when preparing an encapsulation, take into account not only the flanges but also any limiting bars or hinges that may be present. We routinely repair leaks in expansion joints on the following elements:
- Telescopic joints
- Ball joints
- Pipe couplings
- Bellows, etc.
Shell and Tube Heat Exchange Repair Shell and tube-type heat exchanges frequently leak at the tube sheet joints on both ends, where the thermal differential can be significant. To choose the proper repair method, the engineering team considers the chemical process involved, as well as pressures and temperatures, using special techniques to avoid contact between chemical processes and high-temperature saturated vapors.