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Oil & Gas Flange Bolt Sets Wholesale

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Oil & Gas Flange Bolt Sets Manufacturers

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Introduction

Flange Bolt Sets are matched assemblies—typically consisting of stud bolts (like ASTM A193 B7 or B8M) and two heavy hex nuts (A194 Grade 2H or Grade 8)—used to connect critical piping flanges in the Oil & Gas, Petrochemical, and Power Generation industries. These sets are engineered to withstand extreme pressures, high temperatures, and corrosive media, ensuring zero-leak integrity in pipelines and pressure vessels. Full traceability and coating compliance (e.g., PTFE, Cadmium plating) are non-negotiable requirements.

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Specification

Set Components

Stud Bolt (full thread) + 2 Heavy Hex Nuts
Common Grade

A193 B7 Studs + A194 2H Nuts
Optional Coating

PTFE (Teflon), Zinc Plating, HDG
Configuration

ASME B16.5, B16.47 Flanges
Key Requirement

Material Test Reports (MTRs) provided

Applications

  • Pipeline Flanges: Connecting segments of oil, gas, and product pipelines.

  • Heat Exchangers and Boilers: Used in high-temperature, steam-generating equipment.

  • Refinery Process Units: Bolting critical valves, pumps, and reactors exposed to chemical attack.

  • Offshore Platforms: Fastening structural and piping systems in harsh marine environments.

Advantages

  • Guaranteed Compatibility: Studs and nuts are matched to guarantee proper thread fit and strength rating.

  • High Pressure Integrity: Designed to maintain high pre-load and resist thermal cycling without loosening or leakage.

  • Ease of Ordering: Supplied as a complete kit, simplifying procurement and ensuring the correct components are used.

  • Reduced Maintenance: Specialized coatings (PTFE) allow easy bolt removal during system shutdowns.

Payment & Shipping

These critical fasteners often require customized inventory programs, accepting L/C 90 Days for major energy sector clients. Bolt sets are individually bundled, labeled with material and heat codes, and securely shipped in robust wooden boxes or crates to prevent thread damage.

FAQ

  • Q: Why are stud bolts preferred over hex bolts for flange connections?
  • A: Stud bolts (threaded rods) allow tensioning to be achieved at both ends, which is crucial for uniform flange compression. They also allow for quicker installation and removal than hex bolts in space-restricted flange connections.
  • Q: What are the best coatings for high-temperature flange bolts?
  • A: For high temperatures (>450∘C), metallic coatings like aluminum or hot-dip galvanizing are often unsuitable. Instead, high-performance PTFE (fluoropolymer) coatings or even uncoated bare metal (B7, B8M) with specialized lubricants are preferred, depending on the fluid being transported.

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Steady-Ind

Steady-Ind - Pursue quality and cast high-quality goods.

STEADY manufactures over a thousands different types of blind rivet nut in steel,aluminium and stainless steel,thread size from M3-M16 in metric and UNC #6-32 to UNC 1/2-13 in inch. High advantage in stainless steel blind rivets both for open and sealed type, mutigrip,monobolt and other structural rivets. As China Oil & Gas Flange Bolt Sets Manufacturers and Oil & Gas Flange Bolt Sets Factory, we focus on "one stop shopping" and with advantage of large production capacity , consistent quality, competitive prices, punctual delivery and goods serverices before and after sales, STEADY has become one of the leading blind fasteners manufacuture & supplier in Asia.

About Us Steady-Ind
Recommended LINS: Metric Flange Head Bolts High Tensile Structural Bolts 10.9 Full Thread Grade 8.8 Hex Bolts Stainless Steel 316 U-Bolts