welding technical inspection

Structure Test Steel Engineering (STS) Company as the first specialized center for inspection and quality control of welding of industrial and construction steel structures in the country with a brilliant history and a reputable name in the construction industry is ready to provide technical inspection services in construction and industrial projects is.

Inspection and supervision of proper welding of welding equipment is one of the great importance in ensuring the useful life of industrial equipment, including pipelines, dam equipment and water supply facilities, steel structures, storage tanks, pressure vessels; It has furnaces, etc. According to available statistics and objective evidence, the breakdown and collapse of most welding equipment is due to improper execution and engineering and quality control during construction, which has caused weakness in their welded joints. Lack of employing skilled welders in construction and also their unfamiliarity with the requirements and points of welding and non-observance of the basic principles of welding and the existence of specialized organizations and groups to monitor and inspect and correct them with increasing severity.

Structure Test Steel Engineering (STS) has decided to use its experience and technical knowledge to reach world standards in the field of metallurgical and welding engineering after leaving a brilliant record in our country's industry in order to improve reliability and reduction of financial and personal losses in national projects to provide specialized services.

List of contents for welding inspection

·         Abilities of Structure Test Steel Engineering (STS) Company in the field of welding inspection

·         List of equipment and facilities

·         Welding inspection services of Structure Test Steel Engineering (STS) Company

·         Some of projects carried out with the subject of welding inspection

Abilities of Structure Test Steel Engineering Company in the field of welding inspection

Inspection of bolted steel structures

Bolt joints are one of the best types of joints in steel structures that have been considered by designers in recent years due to their very high speed in execution and ensuring their behavior as expected and the desired industrial shape of the structure.

 Unfortunately, in the process of construction of this type of structures, due to the production and construction technology in our country, there are cases of incorrect and principled implementation. Observance of regulations in the process of production, design, execution can guarantee an efficient steel structure for the employer.

Bolt inspection steps:

1-      Confirm material identification of bolts and nuts

2-      Confirm the existence of suitable and controlled conditions for the storage of parts

3-      Confirm the existence of approved agendas for the installation of bolts and nuts and the use of these agendas in the process of executive operations

4-      Approval of the qualifications of all installation personnel

5-      Ensure that all workforce is aware of the bolt installation agenda

Inspection of bridge structures

Due to the special function of bridges in crossing traffic over rivers, canals and reducing the traffic problems of crowded city intersections, there is no doubt that technical problems and in special cases the collapse of bridges will lead to many human and financial losses.

In addition to the necessary inspections during the construction of bridges, regular inspections of city bridges, highways, railways and main roads should be carried out periodically and according to a schedule.

Structure Testing Consulting Engineering Company, using the technical knowledge of its experienced personnel and its advanced and specialized facilities and equipment in the field of performing non-destructive welding tests on steel structures of the bridge, is ready to perform the following services in this field according to publication 367 Technical Bridges, Vice President for Strategic Planning and Supervision as well as current international standards.

Inspection and quality control during bridge construction

Performing destructive and non-destructive tests during bridge construction

Provide instructions and technical documentation for welding and welding of bridge structures

Control and approval of the quality of operation of bridge structures

Carrying out periodic tests and inspections during the operation of bridge structures

Technical inspection of cranes

The importance of using cranes in many industries is very obvious. It has made it easier for cranes to install equipment, build buildings, unload and load ships, and so on. If these machines are not well maintained and are not regularly inspected and tested, they can cause major damage to devices, equipment and staff.

To prevent these injuries and accidents, cranes and lifting equipment should be regularly inspected and tested under a scheduled and regularly to eliminate their defects and problems and be ready for safe operation.

Many accidents and losses have occurred due to negligence and lack of technical inspection and timely testing of cranes and lifting equipment, most of which have been avoidable. To prevent damage due to erosion and damage to parts, cranes and other lifting equipment should be under the system and regulations of technical inspection published by the competent institutions and organizations in full the components of each machines according to its function at the time of technical inspection And tested and repaired if necessary.

Technical inspection of pressurized and atmospheric tanks

Inspection of pressure vessels is one of the most sensitive types of inspection. Each power plant or processing facility has a large number of pressurized tanks with different applications. Some of these pressure vessels, such as the components of the steam generating unit or large complex distillers, and others, such as atmospheric or low-pressure tanks and air receivers, have simpler design and construction steps. Although the scope of these activities is wide; But the inspector's duty is the same in all these cases.

Pressure vessels are potentially dangerous because they store large amounts of stored energy during use. Inspection of tanks should ensure that the tank is under safety pressure and is not damaged. It is clear that different aspects of engineering can affect this safety; Design, creep, fatigue, corrosion resistance and construction skills all have effects. The above phenomena play a role in the safety of a pressurized tank.

Three-dimensional ultrasonic test

Using its advanced equipment in the field of non-destructive testing of welding and metal, this company has the ability to provide its services using the latest technology in the field of new ultrasonic testing methods such as TOFD & B - Scan & C - Scan.

In these methods, which are a good alternative to radiographic testing, in addition to high speed in execution and rapid receipt of information online, it is possible to diagnose and differentiate defects according to their sensitivity and risk. It is necessary to explain that with this method, in addition to high test accuracy; There are no risks and problems with radiographic testing, and projects can be significantly saved in terms of cost and time.

Industrial radiographic test

Radiographic testing (RT) is a non-destructive testing method. Radiographic examination is the use of gamma and X-rays, which are capable of penetrating many materials, to examine materials and detect defects in products. In this method, X-rays or radiographs are directed towards the piece and after passing through the piece, it is reflected on the film. Thickness and internal characteristics make spots in the film appear darker or brighter.

The basis of RT is based on the amount of beam absorption and penetration in the parts. The thickness of the part density has a great effect on the amount of beam absorption and penetration in areas where the thickness is low and also the density is low. Low beam absorption and high beam penetration. Beam absorption and penetration are inversely related.

Areas with low beam absorption and naturally high beam penetration produce darker images on the film, and vice versa when the beam absorption is high and the beam penetration is low, the images on the film are very clear.

List of equipment and facilities

Welding technical inspection equipment

Types of gauges for measuring the dimensions and parameters of welding, thermal plaster, laser thermometer, multimeter, Fiberscope, brisk scope, micrometer, caliper, light meter, inspection light, inspection magnifying glass, tachometer, torque meter and ...

Paint and cover inspection equipment

Types of digital dry paint thickener equipment, magnetic dry paint thickener, Paint adhesion test, paint strength test and ...

Sandblast inspection equipment

Types of gauges for measuring the quality of sandblast, surface roughness gauge and ...

Ultrasonic non-destructive testing equipment

Ultrasonic 3D troubleshooter, angle probe, normal probe, probe connection cable, calibration blocks, etc.

Non-destructive radiographic testing equipment

Source of radiography, dosimeter, collimator, weaver, radiographic film, radiographic film interpretation equipment and ...

Non-destructive testing equipment for magnetic particles

AC / DC magnetic yoke device, UV lamp, light meter, magnetic particle testing consumables, etc.

Non-destructive testing equipment for penetrating liquids

Quality control blocks of consumables, UV lamps, immersion method equipment, permeable fluid testing consumables, etc.

Welding inspection services for steel test structures

Welder testing and certification

The purpose of the welder’s certification test is to ensure their skill in producing a healthy weld. Welder’s test involves many variables such as welding process, base metal material, thickness and welding condition that these variables are extracted from welding instructions.

Welding tests and national and international certifications in accordance with the reference codes and standards are as follows.

1-      ISO 9606

2-      EN287

3-      AWS D1.1

4-      ASME Sec. IX

5-      API 1104

Providing modern air inspection services - air technical inspection

Structure Test Steel Engineering (STS) Company is the only company providing specialized air inspection services in Iran with specialized and experienced inspectors as well as advanced equipment ready to provide special air inspection services in various industries throughout the country.

The services that can be provided by this company in the field of air inspection in various fields and industries are as follows:

Aerial inspection of passenger aircraft fuselage

Aerial inspection of solar power plant facilities and equipment

Air inspection of facilities and accessories of power transmission network towers

Aerial inspection of telecommunication, radio and television towers

Air inspection of oil rigs facilities and offshore facilities and stations

Air inspection of oil, water and gas transmission pipelines on impassable routes

Air inspection of refinery and oil facilities during operation

Aerial inspection of silos, burners, flares and industrial chimneys

Air inspection of pressurized tanks and fuel storage tanks

Aerial inspection of metal and concrete bridges and historic buildings

Aerial inspection of wind farm facilities and structures

Aerial inspection of facilities and structures of hydropower plants and dam walls

Aerial inspection of cranes and towers

Some of projects carried out with the subject of welding inspection

Underpass bridge Imam Hussein project

Morvarid shahr project

Refah Bank building Khuzestan project

Doros Rebar welding engineering service