Type of Service

PT. PUTRA KAHAR RIWAYATI

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Type of service that we conduct  :

 

1. Ultrasonic thickness measurements of vessel hull constructions


In accordance with Class rules all vessels undergo periodical surveys of hull constructions (annual, intermediate, special) with the purpose of ascertainment of technical condition of hull. The survey includes the damage detection of amount of wear, deformation and other defects of hull constructions. Upon comparison of results and class requirements the conclusion if the repairs are required is made.

Our specialists carry out the defect detection of hull constructions, thickness measurements and develop repairs recommendations.

Our staff is qualified in accordance with international standards for the measurement on board during passage and in ports.

The measurements of residual thicknesses are performed using the ultrasonic method. The method is based on the electro-magnetic acoustic emittance and receipt of ultrasonic waves. Calculation of time and speed of passage of ultrasonic signals through the material allows the precise ascertainment of thickness of the object without damaging the object itself.

The principle of operation of the equipment involves the measurement of time interval between the two consecutive echo signals reflected from the inside surface of the material. The interface signal shows the thickness of the coating therefore the displayed result shows the thickness of the material without the coating. The method allows the measurement of thickness without removal of the paint from the surface of the material.

The measurement and defect detection during the pre-repair period allows evaluation of the volume of steel to be replaced thus saving repair time and customer’s money.

Our services:

  • Defect detection and ultrasonic measurement of residual thicknesses of vessel’s hull constructions;
  • Measurement of residual thicknesses of pipe, pressurized vessels, boilers, steam manifolds, calibration of anchor cables;
  • Issuance of required technical documentation in accordance with requirements of Lloyd’s Register, Germanisсher Lloyd, Det Norske Veritas, Bureau Veritas, Nippon Kaiji Kyokai, Registro Italiano Navale;
  • Evaluation of technical condition of hull constructions (visual inspection, thickness measurement, photographs), issuance of preliminary report on board during passage, calculation of volume of steel to be replaced, professional assistance in creation of repair sheets, selection of repair company and order placement, supervision of repairs in accordance with defect detection;
  • Residual thickness measurements with the following calculation of hull strength and possible change of trading area;
  • Calculation of volume of required repairs of hull plating and constructions based on the performed defect detection;
  • Evaluation of technical condition of hull during renovation to 1SS or 2SS;
  • Survey of hull of the vessel during her sale / purchase.

Stages of operation:

  • Conduct of the meeting between the Class Society surveyor, thickness measurement specialist and ship owner’s representative in order to coordinate all operation and ensure security.
  • Visual inspection of hull elements, defect detection and measurement areas.
  • thickness measurements, evaluation of extent of deformations and other hull constructions defects.
  • Comparison of extent of defects and the corresponding values of the class society regulations, issuance of repair recommendations.
  • Issuance of the formal report and coordination of approval by the class society surveyor.

 

2. Non Destructive Testing


Nondestructive testing (NDT) has been defined as comprising those test methods used to examine an object, material or system without impairing its future usefulness. The term is generally applied to nonmedical investigations of material integrity. Strictly speaking, this definition of nondestructive testing does include noninvasive medical diagnostics. Ultrasound, X-rays and endoscopes are used for both medical testing and industrial testing. In the 1940s, many members of the American Society for Nondestructive Testing (then the Society for Industrial Radiography) were medical X-ray professionals. Medical nondestructive testing, however, has come to be treated by a body of learning so separate from industrial nondestructive testing that today most physicians never use the word nondestructive, our service in NDT Division are as follow :

  • Liquid Penetrant Testing
  • Magnetic Particle Testing
  • Radiographic Testing

 

3. Man Power Supply

4. Vaccum Test

5. Hardness Test

 

Feel free to contact us anytime regarding further information about our service