Inspection process

TENSILE TEST:

A mechanical test of parent material, circumferential weld and longitudinal weld of heat-treated cylinder to determine the tensile strength yield strength and parentage of elongation.

BENDING TEST:

A test for cracks and other non-conformance on welding surface.

HYDROSTATIC TEST :

A test carried out by applying water pressure of 35bar into the cylinder to reach rated pressure levels for a period of at least 30 seconds. This is to identify any leakages or distortion.

TIGHTNESS TEST:

Filling each cylinder with compressed, pressurized air prior to immersing the cylinder completely in water to check for any possible leakage.

BURSTING TEST :

To check ability of cylinder to contain the pressure of the gas to required level. The results show other details of mechanical properties. The tear pattern of the sheet material tells us about the quality of weld and sheet material quality.

HARDNESS TEST:

An inspection procedure to examine the hardness of parent material weld and Heat Affected Zones of spud / bung collar, footing circumferential weld and longitudinal weld of cylinder after heat treatment process.

SPECTROMETER TEST :

To analyze the raw materials chemical composition.

MICRO STRUCTURE TEST:

An inspection procedure to examine the hardness of parent material weld and Heat Affected Zones of spud/bung collar, footing circumferential weld and longitudinal weld of cylinder after heat treatment process.