INDUSTRY COMPONENT

Threads/Flange

Threaded flange component for hydraulic systems providing secure, leak-resistant connections between pipes, valves, and equipment.

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Component Specifications

Definition
A threaded flange is a specialized hydraulic connector component featuring precision-machined threads that mate with corresponding threads on pipes, valves, or other hydraulic elements. It serves as a mechanical interface that creates a sealed, pressure-resistant joint in hydraulic systems, typically used in applications where disassembly is required for maintenance or component replacement. The flange portion provides a flat sealing surface for gaskets or O-rings, while the threads ensure mechanical engagement and alignment.
Working Principle
The threaded flange operates on the principle of mechanical thread engagement combined with compressive sealing. When tightened, the threads draw the flange faces together, compressing a gasket or seal between them to create a fluid-tight barrier. The threads provide axial force to maintain compression, while the flange distributes this force evenly across the sealing surface. This dual mechanism ensures both mechanical connection integrity and hydraulic sealing under pressure.
Materials
Carbon steel (ASTM A105), stainless steel (304/316), alloy steel, brass, or specialized alloys for corrosive environments. Surface treatments include zinc plating, galvanization, or passivation for corrosion resistance.
Technical Parameters
  • Size Range 1/8" to 2" nominal diameter
  • Thread Type NPT, BSPP, BSPT, SAE, Metric
  • Surface Finish Ra 3.2 μm or better
  • Pressure Rating 3000-6000 PSI
  • Thread Tolerance Class 2A/2B or 6g/6H
  • Temperature Range -20°C to 200°C
Standards
ISO 1179, ISO 6149, DIN 3852, SAE J514, ANSI B1.20.1

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Threads/Flange.

hydraulic threaded flange flange connector hydraulic fittings NPT flange BSPP flange hydraulic connection components industrial flange standards Threads/Flange Threads/Flange in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Hydraulic Connector

A specialized fitting that joins hydraulic lines and components within a Blowout Preventer (BOP) system, enabling the transmission of high-pressure hydraulic fluid to actuate critical safety functions.

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Engineering Analysis

Risks & Mitigation
  • Thread stripping from overtightening
  • Cross-threading during assembly
  • Leakage from improper sealing
  • Material incompatibility with hydraulic fluid
  • Fatigue failure from vibration
FMEA Triads
Trigger: Incorrect torque application during installation
Failure: Thread stripping or insufficient sealing pressure
Mitigation: Use calibrated torque wrenches, follow manufacturer torque specifications, implement torque verification procedures
Trigger: Vibration in hydraulic systems
Failure: Thread loosening leading to leaks
Mitigation: Use thread-locking compounds where appropriate, implement regular inspection schedules, consider alternative connection methods for high-vibration areas
Trigger: Material corrosion from hydraulic fluid or environment
Failure: Thread degradation and sealing surface pitting
Mitigation: Select corrosion-resistant materials, apply protective coatings, implement preventive maintenance with corrosion inspection

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Thread dimensions per ISO 1179-1 tolerance class Medium, sealing surface flatness within 0.1mm, thread pitch tolerance ±0.025mm
Test Method
Pressure testing per ISO 19879, leak testing with helium mass spectrometry, dimensional verification with thread gauges, material certification per ASTM standards

Buyer Feedback

★★★★☆ 4.6 / 5.0 (36 reviews)

"The Threads/Flange we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements."

"Found 28+ suppliers for Threads/Flange on CNFX, but this spec remains the most cost-effective."

"The technical documentation for this Threads/Flange is very thorough, especially regarding technical reliability."

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Frequently Asked Questions

What is the difference between NPT and BSPP threaded flanges?

NPT (National Pipe Taper) threads are tapered and seal through thread interference, while BSPP (British Standard Pipe Parallel) threads are parallel and require a separate sealing washer or O-ring. NPT is common in North America, BSPP in Europe and Asia.

How do I prevent leakage in threaded flange connections?

Use proper thread sealant (like PTFE tape or liquid thread sealant for NPT), ensure correct torque specification, use undamaged threads, and replace worn gaskets. For BSPP threads, always use the specified sealing washer.

Can threaded flanges be used in high-pressure hydraulic systems?

Yes, when properly specified. High-pressure applications require higher grade materials (like alloy steel), proper thread engagement length, and adherence to pressure ratings. Always verify the flange's pressure rating exceeds system requirements.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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