Grade and application in oil, gas and petrochemical industries
Introduction
In heavy industries, where the equipment is exposed to very high pressure and temperature, the type of connection between metal parts determines the safety and efficiency of the whole system. One of the vital elements in this section is fireproof bolts and nuts, especially the Stud Bolt type, which can withstand heat up to more than 1200°C.
These types of bolts and nuts are resistant not only to heat, but also to corrosion, oxidation, and continuous mechanical stress, and for this reason, they are used in the process equipment of refineries and petrochemicals, especially in the connection of flanges, valves, and heat exchangers.
Ostad Bolt's performance in special refinery conditions
In the oil and gas and petrochemical industries, equipment often deals with high pressures (up to 250 bar) and extreme temperatures (up to more than 1000°C).
The fireproof bolt master is used in these environments to connect the flanges of steam lines, high pressure valves, heat exchangers and chemical reactors.
Important functional features:
Preservation of bolt torque and compressive force in the face of thermal expansion.
Preventing loosening or gas leakage in flange connections.
Resistance against the corrosion of hydrogen gas, sulfur and salt.
Capable of continuous operation in heating and cooling cycles without cracking or deformation.
In thermal cracking units, reforming, and crude oil distillation units, these bolts and nuts are one of the key elements of safety. Standards and quality tests
Master Refractory Bolt should be produced and tested according to international standards. Some of the most important requirements are:
ASTM A453 Grade 660 – for high temperature applications up to 700°C (up to 1200°C in reinforced versions).
ASTM B637 / A193 – standards for nickel alloys and heat-resistant stainless steel.
ASME B16.5 and B16.47 – Standard dimensions and tolerance of threads in flange connections.
Hardness, Tensile Strength, Creep Resistance and Impact Tests to verify durability in heat and long-term pressure.
Benefits in oil, gas and petrochemical industries
Using Ostad Bolt fireproof bolts and nuts has significant advantages:
Increasing system safety: preventing thermal failures in high pressure lines.
Reduction of production stoppages: high durability at high temperature makes repairs and shutdown periods to be done later.
Chemical stability: resistance to corrosive gases, acids and sulphurous vapors.
Easy maintenance: simple replacement without the need to completely cool the system.
Conclusion
Ostad Bolt's fireproof bolts and nuts are one of the strong and hidden bases of confidence in the oil, gas and petrochemical industries. Advanced alloys such as Inconel and Hastelloy provide the ability to withstand temperatures above 1200 degrees Celsius and are used in critical connections for the production, separation and transfer of hot fluids.
These parts, although they seem small, but their role is very decisive in maintaining the safety, efficiency and stability of the entire industrial units.
Which is done in Poladan Saze industry under the management of Farhad Taher.