Product Overview

As a professional manufacturer of high-strength fasteners in China, JF strictly produces bolts for the oil and gas industry according to API 20E/20F standards.
• Specifically designed for oil and gas drilling equipment, subsea pipelines, and refining facilities, passing sulfide stress cracking (SSC) tests and full-size tensile tests.
• Materials include AISI 4140/4340 alloy steel and duplex stainless steel, meeting standards such as API 6A/17D.
• Surface treatment uses a phosphate + silver zinc composite coating to ensure long-lasting corrosion resistance in deep-sea high-pressure environments.
• Comes with API Q1 system certification packages and 3.1/3.2 material certificates to support rapid delivery for global oil and gas projects.

Key Product Types Supplied:

We professionally supply a full range of fasteners that meet stringent API standards, including:

  1. High-Strength API Fasteners: Designed to meet specific mechanical property requirements such as tensile strength and yield strength, used in critical load-bearing applications.

  2. General Oil & Gas API Fasteners: Standardized fasteners covering a wide range of industry applications.

  3. Specialized Drilling API Fasteners: Engineered for harsh drilling environments, resistant to extreme pressure, temperature, and corrosion.

  4. Pipeline API Fasteners: Built for long-distance pipelines, emphasizing pressure resistance, corrosion resistance, and environmental durability.

  5. API Threaded Fasteners: Including bolts, studs, nuts, and more, forming the foundation of all secure API connections.

Core Application Areas (Our Service Focus):

Our API fasteners are widely used across the entire oil and gas industry value chain, particularly in:

  • Wellhead & Christmas Tree Equipment: Ensure safe sealing of critical equipment controlling oil and gas production under extreme stress.

  • Blowout Preventers (BOP): Safeguard drilling operations, maintaining the integrity of high-pressure safety systems to prevent blowouts.

  • Pipeline Systems (Onshore/Offshore): Provide reliable structural connections and flange sealing for high-pressure and corrosive pipelines transporting oil and gas.

  • Valves & Flange Connections: Enable critical flow regulation with long-term, leak-free performance under severe pressure and temperature conditions.

  • Complete Drilling Equipment: Deliver robust connections for all high-pressure, high-temperature, and high-vibration environments, from drilling risers to manifolds.

Core Summary of API Fastener Technical Specifications

The technical specifications for API fasteners constitute a rigorous and systematic framework designed to ensure absolute safety, reliability, and compliance of critical connections in the extreme environments of the oil and gas industry. Their core is not a single metric but a collection of multiple, interrelated dimensions.

I. Core Specification Framework

  • Foundation (API Standards): Dedicated standards such as API 20E, 20F, and 6A serve as the overarching mandates, establishing unified industry requirements from materials to performance.

  • Quality Grading (BSL Levels): BSL-1 to BSL-3 provide clear quality and inspection grades. Higher BSL levels demand stricter requirements for materials, testing, and traceability, with corresponding cost increases. Selecting the appropriate BSL is key to balancing project risk and cost.

II. Performance-Determining Factors

  • Material: This is the foundation of performance. Specific standards (e.g., ASTM A193 for high-temperature service, A320 for low-temperature service, NACE standards for sour service) define the chemical composition and fundamental mechanical properties.

  • Mechanical Properties: Based on the selected material, specific requirements for tensile strength, yield strength, and impact toughness must be met. These values are directly linked to the load-bearing capacity and safety of the fastener.

  • Corrosion Resistance: Ensured through the selection of specific materials (stainless steel, nickel alloys) or the application of specialized coatings/plating. This is crucial for extending equipment lifespan and preventing failures.

III. Manufacturing and Verification Assurance

  • Dimensions and Interchangeability: Adherence to ASME or API-specific dimensional standards ensures the fastener can precisely match and interchange with equipment.

  • Testing and Inspection: This is the essential means of verifying that a product meets all documented requirements. It includes destructive tests (tensile, impact) and non-destructive testing (MPI, UT, RT), which are indispensable, particularly at higher BSL levels.

  • Traceability: Full heat/lot tracking and documentation throughout the supply chain is the lifeline for quality control and root cause analysis in the event of an issue.

IV. Critical Final Application Factor

  • Torque Specification: All superior design and manufacturing ultimately depend on correct installation. Following precise torque values—calculated based on size, material, and application—is the final, vital step in ensuring a safe and reliable connection.