TOHAMA Co. Profile البصرة-حي المهندسين-مجاور شركة المرابع الخضراء

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1 TOHAMA Co. Profile 2017 البصرة-حي المهندسين-مجاور شركة المرابع الخضراء

2 Co. Name : TOHAMA For Engineering Inspection Co. Head office : Basrah Iraq tohamainspection@gmail.com Phone : Leader ship : representative & chairman Expert Saad Mandil Core business : Mechanical engineering testing. 1

3 TABLE OF CONTENT Mechanical engineering testing Our Services Radiogragraphy (RT) Penetrant Inspection Process(PT) 8 4. Magnetic Particle Inspection (MT) Visual Testing (VT) Ultrasonic Testing (UT) Heat Treatment Facility(PWHT) Hardness Testing Hydrostatic Testing Vacuum Testing

4 Mechanical engineering testing : Tohama is a private company was established in Iraq / Basra. (registration No ) providing destructive DT and non-destructive testing NDT and inspection activities throughout qualified inspectors and technicians staff ASNT (American Society for Non-destructive Testing) level ll. They have more than twenty years experience in inspections jobs in many locations and fields, like: rehabilitation for steel structures of the main three bridges in Basra, power plants,high pressure boilers, main steam lines, they do inspection for most fixed and rotated equipment in a chemical and petrochemical plants such as pressure vessels, heat exchangers, tanks,,heaters, reformers, separators piping, pipelines,,valves, safety valves.etc. vacuum and pressure leak testing accordance to related standards and client specification requirements.our team deals with many types of materials in industry,carbon steel, low alloy steel, stainless steels.. and they have a good experience more than nineteen years in execution stress relieving PWHT for welding joints ( for piping and their components, pressure vessels and tanks ). Tohama staff have inspectors that executing NDT inspections on rotary equipments like pumps,rotors,compressors, fans,turbines,gears and capable to check dimensions, run out,tolerances,clearances and alignment etc. 3

5 1. Our Services : - Visual testing (VT). - Radiographic testing (RT). - Liquid Dye Penetrant testing (LPT). - Magnetic Particle testing (MT). - Ultrasonic Flaw detection (UT). - Portable Hardness Measurement. - Ultrasonic Thickness Gauging survey, Storage/Sphere Tanks, pressure vessels piping s Inspection. - Heat treatment (preheating and PWHT). - Pressure leak testing (pneumatic and hydrostatic). - Vacuum leak testing. - Dimensions and clearances check and most inspections activities related rotary machines. - Load testing, lifting, mobile crane, overhead crane - Material testing/ chemical composition test... - Holiday detector test for insulation inspection 4

2. Radiogragraphy (RT) : TOHAMA undertakes X-ray. Radiographic inspection is based on the exposure x ray. The principle of industrial radiography is Differential Absorption.

6 2. Radiogragraphy (RT) : TOHAMA undertakes X-ray. Radiographic inspection is based on the exposure x ray. The principle of industrial radiography is Differential Absorption. This means that different materials absorbs different amount of radiation based on thickness variation, density or presence of defects like cracks, lack of fusion, lack of penetration, gas porosities slag, undercuts etc. Tohama have 300KV & 250KV X- ray equipments and their accessories for radiation safety requirements,manual and auto film processing type COMPACT 2 NDT. Radiographic equipment 5

7 Radiation Alert Detector, Geiger counter, and Survey Meter 6

8 RT automatic processing unit 7

3. Penetrant Inspection Process(PT): The Liquid Penetrant Inspection method is applicable for inspecting material or components when attempting to locate flaws open to the surface of mostly nonporous

9 3. Penetrant Inspection Process(PT): The Liquid Penetrant Inspection method is applicable for inspecting material or components when attempting to locate flaws open to the surface of mostly nonporous material. How to Penetration Test? These basic steps are uniform for the most part, but vary mostly in how each is completed, based on the particular technique being used. It is important for the inspector to know the tolerances and how to maintain the control of them i.e. using a timer for all dwell times and eye adaptation requirements. Pre clean article to be inspected. Apply penetrant to test part. Allow correct dwell time to elapse. Remove excess penetrant from part surface. Dry, if applicable. Apply developer and allow to dwell. Inspect component. Post-clean part. Visible Red Dye Check (Visible Penetrant Testing 8

4. Magnetic Particle Inspection(MT): Magnetic particle inspection is the process of detecting flaws and surface discontinuities within materials that form permanent magnetic poles with provision of

10 4. Magnetic Particle Inspection(MT): Magnetic particle inspection is the process of detecting flaws and surface discontinuities within materials that form permanent magnetic poles with provision of electricity. These materials are commonly known as "ferroelectric" materials, and their common examples include iron, nickel and cobalt. Magnetic particle inspection is used in industrial applications to determine the level of flaws within metal's surface and subsurface through examining the movement of applied particles over them and actually determines the levels of purity, continuity and cracks that they have. This process usually involves magnetizing the subject material under specially designed conditions, which can be specified according to the type of electric current, type of magnet, type of particles and type of magnetization technique used. Magnetic test equipment 9

11 UV lamp Permanent magnate MT cans 10

12 Practices: The wet magnetic particles, fluorescent or not, are suspended in water or liquid wax. The metal surface being tested is magnetized; then the particles are sprayed onto the metal. Metal that is free of flaws will have a uniform red, black, gray or yellow coating, depending on the color of the particles, but flaws in the magnetized metal attract extra particles. Hence the flaws appear to the inspector as easily seen lines or pits. If the wet magnetic particles are fluorescent, the flaws will glow brightly in the dark under ultraviolet rays when the inspector shines a black light on the particle-coated metal. 11

5. Visual Testing (VT) : Visual inspection is examination of the material, or product for conditions of nonconformance using light and the eyes, alone or conjunction with various aids.

13 5. Visual Testing (VT) : Visual inspection is examination of the material, or product for conditions of nonconformance using light and the eyes, alone or conjunction with various aids. Visual inspection is the most commonly employed NDT method. Visual inspection often also involves, shaking, listening, feeling the component being inspected. Visual inspection is commonly employed to support other NDT methods. Some of the common applications of vt inspection are : - flaw detection of surface anomalies such as : scratches, excess surface roughness,and areas void of paint or plating,crack,porosity,corrosion. - Dimension conformance. - Precision measurements. WELDING GAUGES 12

14 VISUAL TESTING OF WELDS 13

15 6. Ultrasonic Testing (UT) : is a versatile inspection technique. It is used to test a variety of both metallic and nonmetallic products such as welds, forgings, castings, sheet, tubing, plastics and ceramics. Ultrasonic has an advantage of detecting subsurface discontinuities with access to only one side of the specimen. The objective of UT ultrasonic testing is to ensure product reliability by means of: 1. Obtaining information related to discontinuities. 2. Disclosing the nature of the discontinuity without impairing the usefulness of the part. 3. Separating acceptable and unacceptable materials in accordance with predetermined standards. UT inspection system consists of pulser & receiver, transducer, and display devices. A pulser/receiver is an electronic device that can produce high voltage electrical pulses. Driven by the pulser, the transducer generates high frequency ultrasonic energy. The sound energy is introduced and propagates through the materials in the form of waves. When there is a discontinuity (such as a crack) in the wave path, part of the energy will be reflected back from the flaw surface. The reflected wave signal is transformed into an electrical signal by the transducer and is displayed on a screen. Signal travel time can be directly related to the distance that the signal traveled and information about the reflector location, size, orientation and other features can sometimes be gained. 14

16 Ultrasonic flaw detector with probes Calibration blocks for UT 15

17 Thickness measurement Equipment Thickness measurement Equipment 16

7. Heat Treatment Facility(PWHT): TOHAMA offers post weld heat treatment by using electricity as source of heating for stress relieving of weld joints.

Additionally, depending on the mobility of the required equipment many of our heating processes can be applied on-site or at your facility.

like post weld heat treatment of PQR test coupons, and various components.

18 7. Heat Treatment Facility(PWHT): TOHAMA offers post weld heat treatment by using electricity as source of heating for stress relieving of weld joints. All TOHAMA heat treatment services are designed to minimize downtime, improve structural integrity, and enhance effective plant life. Additionally, depending on the mobility of the required equipment many of our heating processes can be applied on-site or at your facility. TOHAMA has specialized fully automatic programmable equipment capable of controlling Heating rate, Holding time and cooling rate to carry out a wide range of heat treatment processes like post weld heat treatment of PQR test coupons, and various components. TOHAMA is capable of doing Post weld heat treatment of carbon steel piping welds (pipe-work, headers, flange joints, valves and branches) by means of the electrical resistance method, in the form of ceramic heater pads. The Heat treatment equipment is supplied with chart recorder to record up to 6 thermocouples simultaneously for meeting the critical requirement of heat treatment. Stress relieving at field (PWHT) 17

19 Heat treatment equipment 18

8. Hardness Testing: The principal purpose of the hardness test is to determine the suitability of a material, or the particular treatment to which the material has been subjected.

20 8. Hardness Testing: The principal purpose of the hardness test is to determine the suitability of a material, or the particular treatment to which the material has been subjected. The hardness test is typically performed by measuring the depth of indenter penetration or by measuring the size of an impression left by an indenter. The hardness of a material can be defined as "the resistance the material exhibits to permanent deformation by penetration of another harder material". Hardness test device 19

Surface Preparation : Hardness test specimens must have a polished surface whereas it is regular hardness testing to just have a ground or clean surface.

21 Surface Preparation : Hardness test specimens must have a polished surface whereas it is regular hardness testing to just have a ground or clean surface. In general, however, it can be said that the variation of the measured hardness result relates directly to the quality of the surface preparation. Roughness tester 20

22 9. Hydrostatic Testing : Hydrostatic Leak Testing is used to test components for leaks by pressurizing them inside with a liquid. This testing method can be used on piping, tanks, valves and containers with welded or fitted sections. Hydrostatic Testing can be a nondestructive test as well as used as a burst test. Method : Hydrostatic Leak Testing requires that a component be completely filled with a liquid such as water. Pressure is slowly applied to the liquid until the required pressure is reached. this pressure is held for the required time at which point the component is inspected visually to locate leaks. High pressure hydrostatic testers 500 BAR model 21

10. Vacuum Testing : Vacuum testing is a leak detection method for seam welding in the bottom of tanks and welding joint between shell and bottom performed using a testing box approximately 150 mm (6

During testing, illumination shall be adequate for proper evaluation and interpretation of the test. The open bottom shall be sealed against the tank surface by a suitable gasket.

23 10. Vacuum Testing : Vacuum testing is a leak detection method for seam welding in the bottom of tanks and welding joint between shell and bottom performed using a testing box approximately 150 mm (6 in.) wide by 750 mm (30 in.) long with a clear Window in the top, which provides proper visibility to view the area under inspection. During testing, illumination shall be adequate for proper evaluation and interpretation of the test. The open bottom shall be sealed against the tank surface by a suitable gasket. Connections, valves, lighting and gauges, as required, shall be provided. A soap film solution or commercial leak detection solution, applicable to the conditions, shall be used. Vacuum testing shall be performed in accordance with a written procedure prepared by the Manufacturer of the tank as API standard recommendations. Vacuum test equipmen 22

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Department of Chemical & Polymer Engineering University of Engineering & Technology Lahore (FSD Campus)

Department of Chemical & Polymer Engineering University of Engineering & Technology Lahore (FSD Campus) 1 Nondestructive testing (NDT) use test methods to examine an object, material or system without