construction of pressure vessels, pressure piping, storage tanks, buildings, bridges, offshore
platforms, power plants, oil and gas refineries, and petrochemical plants.
There is often a mandatory requirement for PWHT due to compliance with welding codes and
specifications on certain materials including but not limited to carbon steels, stainless/high alloy
steels and work hardened steels.
PWHT reduces the residual stress introduced by the welding process with a technique that involves
heating, soaking and cooling the weldment surface to controlled temperatures. This improves the
properties of the weldment surface.
Hardness is the property of a material that enables it to resist plastic deformation, usually by
penetration. However, the term hardness may also refer to resistance to bending,
scratching, abrasion or cutting.
Relative hardness of minerals can be assessed by reference to the Moths Scale that ranks
the ability of materials to resist scratching by another material. Similar methods of relative
hardness assessment are still commonly used today.
The above relative hardness tests are limited in practical use and do not provide accurate
data particularly for modern day metals and materials. The usual method to achieve a
hardness value is to measure the depth or area of an indentation left by an indenter of a
specific shape, with a specific force applied for a specific time. There are three principal
standard test methods for expressing the relationship between hardness and the size of the
impression, these being Brinell, Vickers, and Rockwell
PMI is a wide range Positive Material Identification (PMI) elemental analyzer intended mainly for
alloy applications. It is based on energy dispersive X-ray fluorescence technology. The unit provides a
quick field or laboratory method for chemical analysis or sample identification (sorting) directly from
metal samples of various forms. It obtains the chemical composition of a sample in two to five
seconds, with full report in five to 10 seconds.
All stored data can be transferred to a PC via USB cable. The unit is small and portable and ideal for
data collection and storage. The accuracy of the PMI unit is +/- 5%. The unit is calibrated by a 3rd
party yearly and is accurate for elements including Cr, Ni, Mo, Ti, Cb, Ta, W, Co, V.
Rope access is typically used as an alternative to traditional access solutions such as scaffolding,
MEWPs, etc. Rope access is also precious in situations where traditional access solutions are not
APEX-FI utilizes traditional rope-access techniques. Access-related issues are seen as excellent
opportunities to work with our clients to reach suitable, safe and effective access solutions. We also
provide a full package of related industrial services. With our own rope-access training facility, our
personnel are trained to the highest of standards and are fully aware of all new IRATA legislation.
APEX-FI provides its clients with a safety, cost-effective service, completing projects to the highest of
standards. We have a redundancy of knowledge and experience within a wide range of industrial