Petrochemical Grades

Bolts And Petrochemical Grades

Bolts and nuts are used in all types of construction, from the steel frames of houses and buildings, to the support mechanisms of highways and bridges, and even the industrial piping systems that transport various substances such as raw fossil fuels and petroleum products. In fact, when it comes to industries that have the biggest demand for various types of bolts and nuts, the petroleum industries are among those that are on top. And this is where specialized bolts with various petrochemical grades are used.

But how does one find out which bolts are appropriate for a specific function?

Bolt Petrochemical Grades And Head Markings

The first thing that one should do would be to clearly identify how and where the bolts and nuts are going to be used, if the structures for which the bolts will be utilized have something to do with piping systems for petrochemical industries, then only bolts with petrochemical grades should be used.

This is to ensure that the bolts and nuts used are made of metals that can withstand the unique pressures and wear and tear elements associated with petroleum products.

And we can find out a specific bolt’s grade by simply looking at the markings on its hexagonal head. For example, a plain bolt or a bolt head with no markings usually signifies that it is a grade 0, A, or B bolt, and is made with plain low or medium carbon steel, while a bolt head with three radial lines is classified as grade 5 and is made of quenched and tempered medium carbon steel.

ASTM Petrochemical Grades

When looking at charts for bolt grades, you will most likely encounter the acronym ASTM. These letters stand for the American Society for Testing and Materials, the global standards organization that sanctions a variety of materials and products, including bolts and nuts, to make sure that these materials adhere to a certain level of quality and uniform measurement.