Our team of highly qualified and experienced personnel offer a full and comprehensive world-wide inspection and reporting service for industrial and marine boiler plants, turbines, steam chests, valves etc using state-of-the-art inspection equipment and procedures.

Experts in pressure vessel, boiler and combustion system repairs, upgrades and installations, we are proud to have been awarded certificates of authorisation from the American Society of Mechanical Engineers (ASME) and The National Board of Boiler & Pressure Vessel Inspectors for the use of the ‘S’, ‘U’ and ‘R’ stamps to our Middle Eastern and Singapore production facilities.

Preventative maintenance
Our inspection services are in a detailed format which adopts a proactive approach in order to identify potential problems.

Remnant Life Assessment
An extension to the boiler inspection service is the ‘Remnant Life Assessment’. This service extends the inspection to the main components of the boiler such as drums and headers and also to the superheated steam pipe work.

Remnant Life Assessment is specifically designed for operators of vessels, FPSOs, FSOs and LNG carriers where service is required beyond the plants original design, or has operated outside its defined parameters.

Fibre Optic Inspection
Apart from normal visual inspection, internal tube inspections are carried out using fibre optic equipment, which is fitted with a video copy processor capable of recording and printing any frame displayed on the screen. Deposits and corrosion can be identified in the saturated side of the boiler.

Non Destructive Testing
The inspection process can include various procedures such as:

• Magnetic particle inspection
• Ultra-sonic thickness gauging
• Hardness testing
• Tensile testing
• Metallographic replica grain analysis
• Various ultrasonic methods
• Eddy current

Replicate Testing
Replicate testing detects the presence of high temperature creep, which is a major factor in premature failure of superheater tubes. Creep is dependent on time, temperature and stress. When exposed to temperatures above its original design, a material’s structural and chemical properties change and consequently weaken. The results of high temperature creep are commonly seen in the tubes of a superheater which are designed to operate on the edge of their metallurgical limit however it can also be found in high heat flux areas of the boiler, headers, valves and high pressure pipe work in way of areas of high stress.

Ultrasonic Thickness Gauging
Ultrasonic thickness gauging of sample tubes enables corrosion damage to be monitored and ascertains that the tubes still meet the requirements of the original design code.  It also measures oxide formation on the inside of tubes.

Oxide Thickness
Metal temperature increases by 0.6°C -1.1°C for every 0.03mm of oxide deposit. In some of the hotter areas of the superheater where temperatures are closer to the allowable limit an increase of around 20°C could be enough to exceed the limit. This evaluates to an oxide deposit of no more than 0.6mm in thickness increasing the metal temperature above the allowable limit.

Reports & Inspections
The reports generated from inspections can form the basis of repair specifications, or be used for classification and underwriting requirements, as well as forming a database for future condition monitoring. The reports are all submitted on CD-Rom. General Marine Plant can be surveyed using the following :-

• Optical Alignment
• Vibration analysis
• Thermo graphic analysis
• Analysis of lube oil