What are the Keys to Trench Safety?

Grooved fittings (grooved fittings) is a new type of steel pipe connection fittings, also known as clamp connection, which has many advantages.

The design specification for sprinkler systems proposes that the connection of system pipes should use grooved connectors or threaded fasteners,

Grooved fittings include two broad categories of products:

The pipe fittings that play the role of connection sealing include rigid joints, flexible joints, mechanical tees and grooved flanges;

The fittings that play the role of connection transition are

1. Fast installation. Groove pipe fittings only need to install the supplied standard parts and do not need subsequent work such as welding and galvanizing, so the installation speed is faster than screw

1.Simple operation

The connection operation of grooved pipe fittings is very simple, no special professional skills are required, and ordinary workers can operate it after simple training. This is because the product has melted a large number of delicate technical parts into the finished product in a factory manner. It only takes a few minutes to connect a pipe fitting, which greatly simplifies the technical difficulty of on-site operation, saves man-hours, thereby stabilizing the engineering quality and improving work efficiency. This is also the general direction of the development of installation technology.

The traditional welding and flanged pipe connection method not only requires welding workers with corresponding skills, but also takes time, the operation of the workers is difficult, and there is pollution from welding fume. Due to the differences in operating space and welding skills, it is difficult to achieve satisfactory results in welding quality and appearance, which affects the overall quality of the project.

In addition, because the grooved pipe is a finished product, the required operating space on the site is small, and it can be installed by the wall and the corner.

2. The original characteristics of the pipeline are not affected

Groove pipe fitting connection, only a groove is squeezed out by a groove rolling machine on the outer surface of the connected pipe without damaging the inner wall structure of the pipe. This is a unique technical advantage of groove pipe fitting connection. If traditional welding operations are used, many pipes with internal corrosion protection will be damaged. Therefore, the regulations stipulate that galvanized pipes, plastic-lined steel pipes, and steel-plastic composite pipes must not be welded and flanged, otherwise secondary treatment is required.

3.Conducive to construction safety

Adopting the connection technology of groove pipe fittings, only the cutting machine, the groove rolling machine and the knob for the bolts are needed on the site, and the construction is convenient. The use of welding and flange connection requires complex power cables, cutting tools, welding machines and oxygen and acetylene gas cylinders. This brings complexity to the construction organization, and there are also potential dangers of leakage and fire. . At the same time, welding slag generated by welding and gas cutting will inevitably fall into the inside of the pipeline. In use, pipeline valves and even equipment will be blocked, which will also pollute the water quality in the pipeline.

In addition, welding and flange connection inevitably require long-term high-strength aerial work, and production safety accidents are also prone to occur.

4. Good system stability and easy maintenance

The connection method of grooved pipe fittings has unique flexibility characteristics, making the pipeline resistant to vibration, shrinkage and expansion. Compared with welding and flange connection, the stability of the pipeline system is increased, and it is more suitable for temperature changes, thereby protecting The pipeline valves are reduced, and the damage to the structural parts by pipeline stress is also reduced.

Due to the simple connection operation of the grooved pipe fittings, the required operating space becomes smaller, which brings many convenient conditions for future maintenance. When the pipeline needs to be repaired and replaced, only two pieces of clamps need to be loosened to arbitrarily replace, rotate and modify a section of pipeline. No need to damage surrounding walls, reducing maintenance time and costs.

5. Economic analysis

The connection of grooved pipe fittings is simple, saving labor and time, and therefore has good economic benefits. Many articles have done economic analysis, saying that "the use of clamp connection, although the cost of individual accessories of the clamp is higher, but the overall efficiency of the entire pipe network installation is higher than the flange connection." In the article comparison, the flange connection is treated with secondary galvanizing (this is also required according to the specifications).

1. When ordering groove parts, select a proper seal ring. Different media in pipelines need to be equipped with sealing rings of different materials. There are currently eight types on the market.

1. Quickly adopt the groove clamp to contact and install the corresponding pipe fittings. No welding is required during the start, and secondary galvanization and secondary placement are not required. Increased placement rate.

2. Lightweight clamps are light in weight, have a small number of bolts, and are easy to install. No extra skills are required.

3. Reliable and reasonable agency planning, the unique C-type rubber seal ring, to achieve triple sealing, guaranteeing the reliability of the connection seal.

4. The use of grooved clamps for safety and the installation of corresponding pipe fittings begins. Only mechanical assembly is required, no welding is required, and no open flame is provided. Therefore, there is no turbid slag pipeline to ensure the safety of the construction site. , Especially suitable.

5. Economics Due to the rapid resettlement and the absence of special skills, the rate of resettlement repairs is low, so comprehensive resettlement costs can be reduced by 30-50% compared to flanges.

6. Occupied space The space occupied by the small groove type clamp contact connection is about 70% of the flange, and due to the small number of fastening bolts and no objectivity, the construction starts under the condition of particularly narrow practical space.

7. Maintenance is simple, safe and reliable. As long as it is properly installed, the pipelines will pass the pressure test once and run safely. Normally, no maintenance is required, and spare parts do not need to be replaced for decades.

8. Practical pipe materials are generally contacted with grooved clamps, which can be used to connect metal pipes such as seamless steel pipes, galvanized steel pipes, welded steel pipes, stainless steel pipes, and copper pipes.

9, can realize the flexible connection of the pipeline The flexible groove-type clamp approaching the connected pipeline is a flexible system, which can absorb the length displacement of the pipe due to temperature changes, allowing the pipe to have a certain offset angle.

Grooved pipe connection is an advanced pipeline connection method, which can be either buried or buried, with both rigid and flexible joints. Therefore, it has a wide range of applications.

According to the system: it can be used for fire fighting water system, air conditioning hot and cold water system, water supply system, petrochemical pipeline system, thermoelectric and military pipeline system, sewage treatment pipeline system, etc .;

According to the material of the pipe: it can be used to connect steel pipes, copper pipes, stainless steel pipes, plastic-lined steel pipes, ductile iron pipes, thick-walled plastic pipes, hoses and valves with steel pipe joints and flange joints.