Brief Introduction to the Pressure Seal Technique (Without Stopping Production)

1. Applications
The technique of pressure sealing without stopping production is a maintenance technique for advanced equipment that was developed in the mid-1970s. We can eliminate leaks in production equipment or piping using temperature and pressure techniques very quickly, safely, reliably and without interruption of the production process. We can eliminate leaks of the valve filling case in several minutes without changing the fillings and the valve can be opened and closed freely. We can use different advanced light special tools and techniques to seal leaks of the flange, straight pipe, three-way pipe, elbow, screw threads and implement walls. We can customize sealing techniques according to local conditions. Our techniques are widely used in various flow work industries including oil, chemical, fertilizer, power, metallurgy, medicine, chemical fiber, gas, water supply and heat supply.

2. Technique characteristics
1) We can seal under temperature and pressure without stopping production. The seal process does not affect normal production.
2) The technique does not utilize fire, ensuring safety.
3) Special treatment of the leaking position is not necessary before pressure sealing. That makes the operation more convenient and faster.
4) We do not destroy the original sealing structure. The new sealing structure is easy to disassemble. We can eliminate leaks in the disassembly joint structure including flanges, screw thread joints and filling cases.
5) The technique is adaptable and has a wide application scope. It can eliminate the leaks of nearly all liquids.
6) The technique is reasonably priced and does not require high investment.

3. Basic Principles
When some parts of the manufacturing facilities leak, in some instances the leaking media will spray and flow outside under certain temperature and pressure conditions. We can use the original seal cavity or build another seal cavity on the leaking place. We use outside pressure that is stronger than the media system pressure to inject the plastic and solid sealant into the sealing cavam. The sealant is leak and temperature resistant. The sealant will fill the sealing cavity after injection and jam the leaking holes and channels. The sealant will become solid quickly under certain conditions and build a new fixed seal structure and eliminate the media lea
4. Application scope

1) Leaking position: flange, equipment, holes on the pipe structure, welding defects, screw thread tie-ins and filling case leaks. 2) Leaking media: we can eliminate leaks of water, water vapor, air, oxygen, nitrogen, gas, ammonia, liquefied gas, gasoline, diesel oil, kerosene, heavy oil, lubricants, acid, alkali, ester, alcohol, benzene, various heat carriers, hydrocarbon, chemical gas, liquid and all other media. 3) The temperature of leaking media: -195°C--800°C 4) The pressure of the leaking media: vacuum 0--32Mpa(320kg/cm2) or higher.

5. Economic benefits and social benefits
1) The economic benefit of using this technique is to avoid the loss of unplanned production breaks or machine accidents.
2) Avoid resource losses. Most (eighty percent) of eliminated leak points are water vapor leaks. Most are ordinary leaks except the serious leaks that halt production.
3) Decrease the loss of raw materials, supplies and products.
4) Eliminate leaks of flammable and explosive media that ensure production safety by preventing fires and explosions.
5) Reduce and/or eliminate noise and environmental pollution.
6) Easy and fast operation that saves maintenance time and reduces repair costs.

6. Services
1) Technique consultation: answer customer questions about the sealing technique theory and various implementation obstacles.
2) Technique and training: includes jig design, the techniques of leak elimination, various implementation methods, safety techniques, the use of special tools and sealant selection principles and methods. We teach students using classroom instruction, technique videos, demonstration and practice until they can seal leaks under pressure independently.
3) Local emergency service: If there are serious leaks at customer facilities we will send professional sealing implementation staff to eliminate leaks quickly while ensuring production safety.
4) Pressure sealing tools:
(1)special tools for injection sealant: We supply different models of manual, pneumatic and liquid pressed machinery tools for injecting sealant.
(2)special implementation tools: includes small pneumatic tools, electrification tools, belt-fastening tools, special clamps, various tie-ins and accessories that make pressure sealing more convenient.
5) Sealant: we supply multiple models of sealant that are suitable for various media in various temperature ranges from-195°C--800°C.
6) We supply special protection articles for pressure sealing: special overall work uniforms, water- proof uniforms, heat-proof leather uniforms, water-proof gloves, safety caps with masks and noise-resistant ear plugs.