Metal expansion joint:
generally, fluid flows cause changes in temperature or pressure in systems, where piping and Duct has been used, or performance of vibrating instruments such as pump, compressor and also environmental factors such as wind, earthquake and etc. lead to perforce vibrations and shakes, so Metal expansion joint is used to absorb created movements and no transmission of them to existing sets and pipelines. Pipe Vibrations and longitudinal, angular and lateral movements absorption with respect to the way lying is one of Metal expansion joint functions which preventing damage in pipelines. These joints are used in petrochemical, oil, power plants, iron smelting industries, steel complexes, gas, air conditioning and vapor lines and etc.. Flexible steel joints are produced in a variety of single layer, multi layers, welding, flanges, and with fixings. Multi-layer bellows are the most suitable type for reducing and eliminating sound and vibration and not transmitting vibrations to pipelines. Dimensions, size and technical specification is determined based on customer’s need and EJMA standard. For use in chemical lines and heat resistance up to 900 degrees of Celsius, and other special requirements, these fittings are produced with various stainless steel grades.
Abrasive hoses are flexible joints that are used abundantly in fluid movement in heterogeneous joints, non-level surfaces or as vibration absorbers in various industries such as oil, gas, petrochemicals, power plants, cement factories, cube sugar and sugar industries, etc.
These hoses are produced with uncoated or coated stainless steel braid or single-layer stainless steel. hoses without braid are used only for vacuum lines or low pressure applications. Single or multilayer braid hoses are used for hard and variable conditions, these braids are usually made of stainless steel and increase the bellows stiffness. Usually, some of these hoses are produced specifically for variable temperatures and chemical environments with high corrosion rates. The burst pressure of these pipes is usually four times the total pressure, and the test pressure must not be increased to one and a half times the maximum working pressure in order to avoid the risk of deformation and complexity and swirling.
Advantages of flexible metal hoses:
- Corrosion resistance
- High pressure tolerance
- Heat and direct flame resistance
- Resistance to abrasion and penetration
- Connectivity to moving parts of machines
- The vibration and sound absorption of oscillating equipment
Fabric Expansion Joints:
These joints are generally used to neutralize thermal expansion and contraction along the paths that are commonly used for low pressure gas fluids. Fabric expansion joints are able to absorb movements on all planes simultaneously at many times, and even torsional movements can be repelled by these joints, and they can also correct non-axial flanges. It should be noted that under the same conditions, it is easier to repair, maintain, install and replace fabric expansion joints than other expansion joints. Fabric expansion joints with rectangular, circular, and etc. sections are available. They are also lightweight, and with easy installation, it is possible to add good acoustic properties by adding a layer of internal insulation. Fabric joints are used for a range of temperatures ranging from -50 to 1200+ degrees Celsius. Fabric joints can also be used as seals, and non-axial compensation of installations. Fabric fittings are available in any size and shape that are either standard or are made to meet the needs of the employer. The determining factors in choosing a fabric joint are: fluid type, temperature, pressure, intermediates (environment) and etc.
The materials used for every single layers of a multilayer fabric joint and the number of layers are in accordance with the type of expansion joint and the working conditions and are changeable. It is worth noting that the Erteashat Sanate Arak Co. supplies its consumer goods from reputable European companies such as Hiltex and Thermal Ceramic.
After receiving of the production order from the planning department, first shop drawings are prepared, then the department experts are going to produce the product by choosing the most appropriate method.
The entire process of this section is under the control of the Quality Control Department, which reduces the potential production mistakes, and improves the quality of the final product.
This department, improves the quality of the product by using modern machine tools and proper hardware and software facilities and steel making methods such as Punch Forming-Roll Forming-Hydroforming, in addition to shortening the production time.
Quality assurance is a broad concept and includes all the measures and solutions that alone or jointly can affect the quality of the product to ensure the quality of the product is obtained. Therefore, the duties of the quality assurance unit of the Erteashat Sanate Arak Co. can be summarized in a few lines as follows:
Controlling input materials and matching with technical certificate provided by suppliers (metallography).
Perform various inspections on products, including: Pressure test- Radiographic test- Liquid penetrant test.
- Periodic control of welders.
- Keep reference standards up to date.
- Calibration of measuring equipment.
- Providing final books for custom products in paper and electronic forms.
- Presenting the final inspection report to the employer in the form of Final Book.
- Manage and monitor of various required tests for the certification of welders in the company.
The healthy delivery of parts to the employer is always one of the most important concerns of the Erteashat Sanate Arak Co., because all the efforts made in the process of producing the piece and the finished product are completed with its safe delivery to the customer. Therefore, the way to send and package parts is very important. Packaging Department of Erteashat Sanate Arak Co., by taking into account the sensitivity of parts and type of parts, makes packaging suitable with the Packing List to prevent any damage to the warehouse and transportation.
In order to satisfy the customer, the first step in producing a quality product is to provide the proper materials. For this purpose, the trading sector of Erteashat Sanate Arak Co., composed of experienced domestic and foreign buyers, is one of the most important units of this company. This department purchases the raw materials required by the projects after the requests of engineering department and in accordance with the standards of AISI, ASME, ASTM, etc. from countries and companies approved by the employer with valid certificates.
The possibility of inspection at the origin by the experts of the employer or international inspection companies, the accuracy, speed of operation, the quality of the materials purchased, etc. are the hallmarks of this department
Coordination of different units, including sales, production, supply of materials for production, scheduling and issuance of orders, and eventually timely delivery of products to the customer, are the missions of the Planning Department of the Erteashat Sanate Arak Co. . Due to the wide scope of the work, this unit minimized the probable errors with project control software.
Sending up-to-date information from the project to the employer, controlling the production and recording of reports, production events, and receiving analytical information on the amount of production, stoppage cases and reasons, waste, etc. are also other tasks of this department.
Design and Engineering Sales Department:
After receiving customer’s requests, if necessary, this department will send the forms to customers for receiving design information. After receiving the required parameters with the help of special expansion joints software and taking into account the EJMA and ASME standards, they prepare a technical offer, and after confirmation, they will send commercial offer.
Consultation to customers, proper design according to standards, and ultimately the proper selection of the Expansion Joint, in addition to the proper operation of the system, prolongs the life of the joints.
The design and engineering sales department of the Erteashat Sanate Arak Co. with the constructive interaction with the technical expert of the employer, in addition to raising its experience and knowledge, provides the employer with his own experience in order to achieve a better result.