Fasteners
June 10, 2026
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- Petrofast Middle East: Fastening Solutions with Experience
- Hamriya Free Zone, Sharjah, UAE
The stud bolt is a crucial part that holds everything together in every oil refinery, gas processing plant and industrial pipeline in the UAE and wider GCC region. Wrong stud bolt results in leakage of flanged joints, failure of pipelines and costly shutdowns. But for all their importance, many procurement teams and engineers are unsure of the correct grades, standards and coatings for their particular application.
This guide explains it all: what are stud bolt fasteners, what materials and standards are they available in, where are they used and how Petrofast Middle East FZC, a leading stud bolt manufacturers UAE, supplies them to projects across the Gulf.
A stud bolt is a threaded cylindrical fastener without a head and with partial or full thread. Unlike a regular hex bolt, a stud bolt threads into a component on one end and takes a nut on the other. This design is suitable for high pressure and high temperature applications where a bolted joint must be assembled and disassembled many times without damaging the mating component.
Stud bolts fasteners are preferred for flanged pipe connections, pressure vessels, heat exchangers and valve assemblies for industrial applications. Due to their strength, reliability and long service life, they are trusted by engineers in the oil, gas, petrochemical and power generation industries over any other type of fastener.
The most important decision when sourcing stud bolt fasteners is selecting the correct material. The wrong grade will cause premature failure due to high temperature or corrosive environment.
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Material Grade
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Standard
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Common Application
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Min. Tensile Strength
|
|---|---|---|---|
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B7 (Cr-Mo Alloy Steel)
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ASTM A193
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High-pressure flanges, refineries
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125 ksi (860 MPa)
|
|
B16 (Cr-Mo-V Alloy Steel)
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ASTM A193
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High-temp steam, power plants
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125 ksi (860 MPa)
|
|
B8 / B8M (Stainless 304/316)
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ASTM A193
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Corrosive environments, chemical plants
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75 ksi (515 MPa)
|
|
L7 (Low-Temp Alloy)
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ASTM A320
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Cryogenic pipelines, LNG plants
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125 ksi (860 MPa)
|
|
Gr. 660 (Incoloy A-286)
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ASTM A453
|
Extreme heat, turbines
|
150 ksi (1034 MPa)
|
Petrofast Middle East FZC supplies ASTM stud bolts to the full range of ASTM A193/A193M specifications, including Grades B7, B7M, B16, B8, B8M Class 1 and 2, B8C, B8T, and B8MCuLN. These are the most widely specified high tensile stud bolts for pressure-containing applications worldwide.
For low temperature service, catalogue confirms full coverage under ASTM A320/A320M, including Grades L7, L7M, L43, B8 and B8M Class 1 and 2. Such solutions are key to cryogenic and sub-zero environments such as the LNG plants that are ubiquitous in the UAE and the Gulf.
We offer stainless steel stud bolts for corrosion critical service in Grades 304, 304L, 316, 316L, 310 and 410 per ASTM A276. For the most severe environments Petrofast Middle East FZC also stocks ISO 3506-1 grades A2-70, A4-70, A4L-70, A4-80 and A4L-80, plus Incoloy 625, 825, 925, Hastelloy and Monel 400 and 500.
We specifically stock Duplex and Super Duplex stainless steel stud bolts UAE in grades S31803, S32205, S32750 and S32760 for offshore, marine and desalination plant applications in the Gulf region where chloride induced stress corrosion is a serious concern.
Go inside any major industrial plant in Sharjah, Abu Dhabi and you will find stud bolts for oil and gas holding the flanged joints in all pipelines, vessels and rotating equipment. That is where they are most commonly deployed:
Industrial stud bolts UAE are the primary fastener used in wellhead assemblies, manifolds, FPSO vessels, and refinery process lines. The combination of high pressure, elevated temperature, and corrosive media means only certified B7 stud bolts or higher-grade alloys are acceptable. ADNOC and other major UAE operators typically mandate ASTM A193 compliance with full mill test reports and traceability documentation, both of which Petrofast Middle East FZC provides as standard.
Flange stud bolts are specially made for ASME/ANSI flanges. They pass through both flanges and are locked with heavy hex nuts on either side to form a uniform and leak-proof seal with the proper gasket. Petrofast Middle East supplies flange stud bolts UAE as per ASME B16.5 and B16.47 in pressure classes ranging from 150 lb to 2500 lb and in all standard face types.
Heavy duty stud bolts and anchor studs are extensively used in structural steel connections, equipment base-plate anchoring, and modular plant construction. Petrofast Middle East supplies full-threaded bars and carbon steel stud bolts under ISO 898-1 Class 4.6, 8.8, 10.9, and 12.9 for general construction use across the UAE.
High-temperature power generation turbines and heat exchangers demand Grade B16 or heavy duty stud bolts Dubai in Incoloy and Hastelloy. B16 stud bolts are made of chromium-molybdenum-vanadium that provides better creep resistance at temperatures over 500 degrees C. B16 stud bolts are preferred for boiler flanges and steam headers.
Correct coating greatly extends the service life of threaded stud bolts in aggressive Gulf environments. Petrofast Middle East FZC’s in-house PTFE coating plant means every coating option is available:
When sourcing stud bolt fasteners for a critical oil and gas project, it’s not just about cost. It’s about traceability, certification and reliability in delivery. As one of the most experienced stud bolt suppliers UAE with over 20 years in the GCC market, Petrofast Middle East FZC brings a complete end-to-end supply capability that few competitors can match.
The company is Quality Management System ISO 9001:2015 certified Petrofast Middle East FZC. Each batch of ASTM stud bolts are tested for chemical composition, mechanical properties, dimensional accuracy and coating thickness. Specialty alloys are subjected to advanced testing methods including Dye Penetrant (DP) testing, Positive Material Identification (PMI) and Non Destructive Testing (NDT) techniques.
Each product is supplied with full traceability and test reports per international standard stud bolt specifications. This is the documentation that UAE clients, especially those working on ADNOC, DEWA, or EPC contractor projects, require as a minimum.
With a 10,000 sq. metre manufacturing facility in Hamriyah Free Zone, Sharjah, Petrofast Middle East FZC can produce custom stud bolt materials and lengths to any drawing. The production line includes CNC thread rolling machines, cut thread machines, chamfering, marking, heat treatment via pit-type tempering furnace, shot blasting, and the in-house PTFE conveyor oven coating system. If you need to buy stud bolts Sharjah in a non-standard size or exotic alloy grade, this is the facility that makes it possible.
With inventory held in Sharjah and group companies in Houston, London, and Lahore, Petrofast Middle East FZC can respond quickly to urgent requirements. Whether you need heavy duty stud bolts Dubai delivered the same day or industrial stud bolts UAE-wide for a turnaround maintenance project, the logistics infrastructure is in place.
In a world where a single flange failure can shut down a refinery for days, stud bolt fasteners are not a commodity. They are a critical engineering decision. Specifying the wrong grade, buying uncertified material, or using incorrect stud bolt dimensions for a flange class can have costly and dangerous consequences.
Petrofast Middle East has spent over two decades building the expertise, inventory, and manufacturing capability to make sure this never happens to our clients. From ASTM B7 to Hastelloy, from standard UNC threads to fully custom metric studs, every stud bolt supplier UAE, claim we make is backed by certifications, test reports, and thousands of successfully delivered projects across the GCC.
Make sure you are buying from a manufacturer you can verify, so that you know your operations will be secure under extreme pressures. Browse our complete line of high performance fasteners or contact our technical team today to ensure you get the exact specs your next project requires.
B7 is a high pressure and high temperature strong alloy steel. B8 is a tough stainless steel made to stop rust in harsh chemical or wet spaces.
PTFE coating is best for saltwater because it stops rust and helps nuts turn smoothly. Zinc dipping works well for heavy outdoor frames that touch fewer chemicals.
To find the right length, add the thickness of both pipe rims, the center seal, and the space needed for nuts on both ends to twist on safely.
Yes. Petrofast makes these special metals that combine two types of steel. They are perfect for seawater systems and desert factories because they never rust from harsh salt.
Every order comes with official paperwork proving the metal quality, exact sizes, heat treatment, and independent lab test results, so you know your parts are safe and traceable correctly.
