• Petrofast Middle East: Fastening Solutions with Experience
  • Hamriya Free Zone, Sharjah, UAE
Stud bolts (1)
  • May 22, 2026
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Premium Stud Bolt Fasteners | Petrofast Middle East FZC

Stud Bolt Fasteners: The Complete Industry Guide for Oil and Gas, Piping, and Heavy Industry in the UAE Request a Quote In every oil refinery, gas processing plant, and industrial pipeline across the UAE and the wider GCC region, one critical component holds everything together: the stud bolt. Without the right stud bolt, flanged joints leak, pipelines fail, and costly shutdowns follow. Yet despite their importance, many procurement teams and engineers are unsure about the right grades, standards, and coatings for their specific application. This guide breaks it all down: what stud bolt fasteners are, what materials and standards they come in, where they are used, and howPetrofast Middle East FZC, one of the leading stud bolt manufacturers UAE, supplies them to projects across the Gulf. What Is a Stud Bolt and Why Does It Matter in Heavy Industry? A stud bolt is a fully or partially threaded cylindrical fastener with no head. Unlike a standard hex bolt, a stud bolt threads into a component on one end and accepts a nut on the other. This design makes it ideal for high-pressure and high-temperature applications where a bolted joint must be repeatedly assembled and disassembled without damaging the mating component. In industrial settings, stud bolt fasteners are the standard choice for flanged pipe connections, pressure vessels, heat exchangers, and valve assemblies. Their strength, reliability, and long service life are why engineers across oil, gas, petrochemical, and power generation sectors trust them above all other fastener types. Types of Stud Bolts Full-Threaded Stud Bolts: Threaded along their entire length. Most common in flange connections. Double-End Studs: Threaded on both ends with a plain shank in the middle, used in heavy machinery and pumps. Tap-End Studs: One threaded end is shorter, screwed permanently into a tapped hole. Common in engine blocks and pressure housings. Continuous Thread Studs: Same thread along the full body, flexible for custom-length cuts in the field. Stud Bolt Materials and Standards Choosing the right material is the most critical decision when sourcing stud bolt fasteners. The wrong grade in a high-temperature or corrosive environment causes premature failure. Below is a breakdown of the main material grades and standards that Petrofast Middle East FZC carries: Material Grade Standard Common Application Min. Tensile Strength B7 (Cr-Mo Alloy Steel) ASTM A193 High-pressure flanges, refineries 125 ksi (860 MPa) B16 (Cr-Mo-V Alloy Steel) ASTM A193 High-temp steam, power plants 125 ksi (860 MPa) B8 / B8M (Stainless 304/316) ASTM A193 Corrosive environments, chemical plants 75 ksi (515 MPa) L7 (Low-Temp Alloy) ASTM A320 Cryogenic pipelines, LNG plants 125 ksi (860 MPa) Gr. 660 (Incoloy A-286) ASTM A453 Extreme heat, turbines 150 ksi (1034 MPa) J-Bolt Anchors; Light to Medium Load Fixing 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, the catalogue confirms full coverage under ASTM A320/A320M, including Grades L7, L7M, L43, B8, and B8M Class 1 and 2. These are critical for cryogenic and sub-zero environments such as LNG plants common across the UAE and Gulf. Stainless Steel and Exotic Alloy Options Stainless steel stud bolts, including Grades 304, 304L, 316, 316L, 310, and 410 under ASTM A276 are stocked for corrosion-critical service. For the most extreme environments, Petrofast Middle East FZC also supplies 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. Duplex and Super Duplex stainless steel stud bolts UAE in grades S31803, S32205, S32750, and S32760 are specifically stocked for offshore, marine, and desalination plant applications in the Gulf region, where chloride-induced stress corrosion is a serious concern. Chemical Anchor Bolts; The High-Performance Bond Solution If you walk through any major industrial facility in Sharjah, Abu Dhabi, you will find stud bolts for oil and gas holding together the flanged joints in every pipeline, vessel, and piece of rotating equipment. Here is where they are most commonly deployed: Oil and Gas: The Highest-Demand Sector 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 Connections in Piping Systems Flange stud bolts are designed specifically for ASME/ANSI flanges. They pass through both flanges and are fastened with heavy hex nuts on each end, creating a uniform, leak-proof seal when used with the correct gasket. Flange stud bolts UAE from Petrofast Middle East are available per ASME B16.5 and B16.47 requirements, in pressure classes from 150 lb to 2500 lb, and in all standard face types. Construction, Structural, and General Industrial Plants 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. Power Generation and Petrochemical High-temperature power generation turbines and heat exchangers demand Grade B16 or heavy duty stud bolts Dubai in Incoloy and Hastelloy. The chromium-molybdenum-vanadium composition of B16 stud bolts gives them superior creep resistance above 500 degrees C, making them the preferred choice for boiler flanges and steam headers. Chemical Anchor Bolts; The High-Performance Bond Solution The right coating dramatically extends the 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: PTFE (Polytetrafluoroethylene): Available in multiple colors for grade identification. Provides excellent corrosion resistance and low friction, ideal for offshore and chemical service. Hot Dip Galvanized (HDG): Thick zinc layer for structural

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  • May 22, 2026
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Stud Bolt Types & Their Applications | Petrofast Middle East FZC

Choosing the Right Stud Bolt Types: Secure Your Systems and Prevent Costly Failures Request a Quote When it comes to holding flanges, pipelines, and pressure vessels together, stud bolt types make all the difference. The wrong choice can lead to leaks, failures, and costly downtime. The right one keeps your system safe for years. In industries like oil and gas, power generation, and construction across the UAE and the wider GCC region, stud bolt fasteners are used every day in thousands of critical joints. But not all stud bolts are the same. This guide covers every major type of stud bolt, the standards they follow, the materials they are made from, and where each one is best used. Different Types of Stud Bolts There are several types of stud bolts. Each one is designed for a specific job. Some are used in high-pressure pipe joints. Others are used in structural or mechanical applications. Knowing the difference helps you pick the right fastener for the right job. Fully Threaded Stud Bolts are threaded from end to end Double-end stud bolts are threaded on both ends with a plain middle section Tap End Stud Bolts have one short end for tapping into a part, and one has a long end for a nut Continuous Thread Studs are used in anchoring and general fastening Each of these serves a different purpose. Petrofast Middle East FZC stocks all of these in a wide range of materials, grades, and finishes. They are available as per ASTM A193/A193M, ASTM A320/A320M, ISO 3506-1, and ISO 898-1 standards. Threaded Stud Bolts Threaded stud bolts are one of the most common fasteners in industrial plants. They are used where a bolt head would not fit or is not practical. The stud is set into a threaded hole on one side, and a nut is applied on the other side. Petrofast Middle East FZC supplies threaded stud bolts in the following material grades: Material Grade Specifications Standard Material Grades Supported ASTM A193 / A193M B7, B7M, B16, B8, B8M, B8T, B8C, B8MCuLN ASTM A320 / A320M L7, L7M, L43, B8 (Class 1 & 2), B8M (Class 1 & 2) ISO 3506-1 A2-70, A4-70, A4L-70, A4-80, A4L-80 ISO 898 Property Class 4.6, 8.8, 10.9, 12.9 J-Bolt Anchors; Light to Medium Load Fixing 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, the catalogue confirms full coverage under ASTM A320/A320M, including Grades L7, L7M, L43, B8, and B8M Class 1 and 2. These are critical for cryogenic and sub-zero environments such as LNG plants common across the UAE and Gulf. Stainless Steel and Exotic Alloy Options Stainless steel stud bolts, including Grades 304, 304L, 316, 316L, 310, and 410 under ASTM A276 are stocked for corrosion-critical service. For the most extreme environments, Petrofast Middle East FZC also supplies 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. Duplex and Super Duplex stainless steel stud bolts UAE in grades S31803, S32205, S32750, and S32760 are specifically stocked for offshore, marine, and desalination plant applications in the Gulf region, where chloride-induced stress corrosion is a serious concern. Chemical Anchor Bolts; The High-Performance Bond Solution If you walk through any major industrial facility in Sharjah, Abu Dhabi, you will find stud bolts for oil and gas holding together the flanged joints in every pipeline, vessel, and piece of rotating equipment. Here is where they are most commonly deployed: Oil and Gas: The Highest-Demand Sector 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 Connections in Piping Systems Flange stud bolts are designed specifically for ASME/ANSI flanges. They pass through both flanges and are fastened with heavy hex nuts on each end, creating a uniform, leak-proof seal when used with the correct gasket. Flange stud bolts UAE from Petrofast Middle East are available per ASME B16.5 and B16.47 requirements, in pressure classes from 150 lb to 2500 lb, and in all standard face types. Construction, Structural, and General Industrial Plants 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. Power Generation and Petrochemical High-temperature power generation turbines and heat exchangers demand Grade B16 or heavy duty stud bolts Dubai in Incoloy and Hastelloy. The chromium-molybdenum-vanadium composition of B16 stud bolts gives them superior creep resistance above 500 degrees C, making them the preferred choice for boiler flanges and steam headers. Chemical Anchor Bolts; The High-Performance Bond Solution The right coating dramatically extends the 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: PTFE (Polytetrafluoroethylene): Available in multiple colors for grade identification. Provides excellent corrosion resistance and low friction, ideal for offshore and chemical service. Hot Dip Galvanized (HDG): Thick zinc layer for structural and outdoor applications. Standard for anchor bolts and threaded stud bolts in construction. Electro Zinc Plated: Thinner, economical zinc coating for moderate environments. Continuous Thread Studs: Same thread along the full body, flexible for custom-length cuts in the field. Electroless Nickel Plated (ENP): Uniform hard coating for bore holes and recessed areas where standard plating is ineffective. Yellow Passivated / Zinc Nickel: Enhanced corrosion performance for demanding industrial

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