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Flare Fittings

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Stainless Steel FLARE FITTINGS

Flare Fittings by SuperlokUSA®

SuperlokUSA flare fittings are engineered for high-pressure fluid and gas transfer applications where vibration resistance, reliability, and long-term performance are non-negotiable. Designed with a precision-machined 37° flare seat, these fittings provide a leak-tight seal in extreme environments, making them ideal for use in refrigeration, HVAC systems, fuel lines, and hydraulic circuits. Manufactured from corrosion-resistant materials and available in a wide range of configurations, Superlok flare fittings deliver a secure, durable connection across critical applications.

Each flared fitting meets SAE J514 and ISO 8434-2 standards for full compatibility with industry-standard systems.

Request a quote today or call (805) 658-2043 to spec Superlok flare fittings for your high-pressure application.

They perform under extreme pressure and temperature, with working limits up to 8700 psi (600 bar) at 100°F with O-ring types, and up to 800°F (427°C) for non-O-ring variants. This performance makes them a reliable choice for operations that require secure sealing in tight spaces, frequent maintenance, or harsh operating conditions.

With options including elbows, tees, reducers, and hose adapter capabilities, Superlok flare fittings give engineers and technicians the flexibility to build out complex systems with confidence. Their mechanical strength, temperature resistance, and field-proven sealing performance make them a go-to solution when system safety and uptime matter most.

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FLARED FITTINGS Pressure Ratings

Nom.SAE
Dash Size		Nom.Tube O.D
Inches		37 Flare
Straight Thread		Nom.Pipe
Size		SAE St. Threads
Union and Bulkhead
(psi)		Fittings with
Pipe Threads
(psi)
21/85/16" - 241/8"50005000
33/16
3/8"- 241/8"50005000
41/4
7/16" - 201/8"50005000
55/161/2" - 201/8"50005000
63/8
9/16" - 181/4"50005000
81/2
3/4" - 163/8"45004000
105/8
7/8" - 141/2"35003000
123/41 1/16" - 123/4"35003000
147/8
1 3/16" - 123/4"30002500
1611 5/16" - 121"30002000
201 1/4
1 5/8" - 121 1/4"25001150
241 1/2
1 7/8" - 121 1/2"20001000
32
2
2 1/2" - 122"15001000

Swagelok® Alternative Flared Fittings by Superlok

Swagelok® flared fittings are widely known for their high-performance sealing and vibration resistance in fluid and gas systems. But for teams seeking faster delivery and more cost-effective sourcing, Superlok provides a proven alternative offering the same 37° flare compatibility, system fit, and durability without the premium markup.

Superlok flared fittings are precision-machined to meet SAE J514 and ISO 8434-2 standards, ensuring full interchangeability with Swagelok®. Built from corrosion-resistant materials and tested for high-pressure, high-temperature conditions, these fittings are used in demanding applications like HVAC, fuel lines, mobile hydraulics, and industrial gas systems. Their vibration-resistant construction and leak-tight flare seat design offer consistent performance under mechanical stress and thermal cycling.

With wide U.S. availability and the same form, fit, and function as Swagelok®, Superlok flared fittings are a smart drop-in replacement for engineers and techs who want reliable parts without long lead times. From routine maintenance to full system installs, Superlok brings flexibility and confidence to any flare-based connection.

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Swagelok® Alternate Parts Near

Superlok flared fittings are fully interchangeable with Swagelok® and Parker® 37° flare fittings. They match in form, fit, and function, making them a drop-in comparable part for existing flare systems without needing to modify your setup.

Each fitting is manufactured to meet SAE J514 and ISO 8434-2 standards, with precision-machined flare seats and tight tolerances to ensure a leak-tight seal. These specifications guarantee compatibility across systems requiring reliable, high-pressure flare connections.

To confirm performance and fitment, SuperlokUSA provides official SGS-certified test documentation verifying interchangeability and pressure integrity. If you’re sourcing Swagelok® alternative flare fittings near you, Superlok delivers precision, speed, and proven field reliability.

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Installation & Maintenance Best Practices

Superlok 37° flared components necessitate precise tube preparation to ensure conical seat conformity under dynamic loads. Flare tubing ends with hydraulic tools per SAE J514, achieving 37° angle within ±1° and wall thinning under 20% for 316 stainless steel schedules.
  • Assemble by hand-threading the nut to capture the flare, then torque to 20 ft-lbs on 1/4-inch sizes escalating to 100 ft-lbs on 1-inch using crowfoot wrenches, averting sleeve deformation in vibration-heavy hydraulics.
  • Route assemblies with 90° bends minimized to curb turbulence, securing with stainless clips every 12 inches to dampen resonance in aerospace fuel lines.
  • Conduct initial proofing at 1.5 times rated pressure with hydraulic oil, holding 5 minutes while scanning for seat leaks via ultrasonic detectors.
For high-purity fluid processors, incorporate O-ring variants with FKM seals rated to 400°F, facilitating disassembly without flare damage in frequent-service refrigeration circuits.
  • Examine semi-annually for flare cracking or thread galling on 316 stainless steel via dye penetrant, re-flaring ends if lip radius deviates over 0.002 inches.
  • Clean conical seats with nylon brushes and solvent flushes annually, restoring with light honing if scoring impacts seal compression in corrosion-resistant alloys.
  • Re-torque post-thermal exposure to 800°F, employing infrared thermography to map stress hotspots in precise fluid control manifolds.
  • Archive torque logs and pressure traces digitally, benchmarking against flow coefficients to forecast endurance in mobile hydraulic booms.
Such routines bolster components for 50,000 flex cycles, enforcing sanitary stainless steel hygiene in HVAC coils and minimizing leaks in industrial gas cabinets.
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Quality & Standards Compliance

These components stem from 316 stainless steel forgings under ASTM A182/A479, boasting tensile strengths over 80 ksi and hardness below 95 Rockwell B to resist flare deformation.

  • Conical seat machining holds ±0.001-inch tolerances per ISO 8434-2, gauged with conical plug sets and coordinate measuring machines (CMMs) for uniform contact.
  • X-ray fluorescence positive material identification (PMI) verifies chromium above 16% on full production runs, tying to heat certificates for molybdenum-enhanced pitting resistance.
  • Burst qualification to four times working pressure aligns with SAE J514, incorporating cyclic fatigue tests to 1 million impulses without seat extrusion.
Thread engagement meets ASME B1.1 class 2A, proven by 500-hour salt spray per ASTM B117 with no base metal exposure on electropolished variants.
  • Seal efficacy at 10^-6 scc/sec confirmed via helium spectrometry, per ISO 9001:2015 for serialized tracking from forge to pack.
  • Form-fit validation with Swagelok®, Parker®, and Hy-Lok® via intermix torque curves, sustaining 5,000 psi without galling.
  • FEA evaluates flare stresses under 8,700 psi, tuning nut geometries for 10-year vibration life per ISO 6803 hose assembly specs.
  • SGS oversight furnishes metrology logs and magnetic particle NDT for discontinuities under 0.0005 inches in high-stress zones.
Enclosed mill test reports (MTRs) and certificates of compliance (CoCs) arm users for compliance reviews in pressure systems, spanning fuel depots to biotech fermenters, with components outpacing norms for leak-free durability.
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Frequently Asked Questions

What materials build Superlok flared components?
Superlok flared components use 316 stainless steel per ASTM A182/A479 for corrosion resilience in high purity sanitary stainless steel environments, with carbon under 0.02% to curb work-hardening during flaring operations. Brass options fit low-corrosive pneumatics, while coated variants enhance sanitary seals in beverage carbonators, ensuring leak-free performance over 20,000 cycles.
Superlok 37° flares endure 5,000 psig at 70°F for 1/4-inch tubes, tapering to 2,500 psig at 800°F per ISO 8434-2 curves for sustained integrity under extreme conditions. Bulkhead styles cap at 4,500 psig, scaled for shock loads up to 7,500 psig in hydraulic rams without deformation or seal failure.
Superlok flared components mirror Swagelok®, Parker®, and Hy-Lok® per SAE J514, with identical flare angles and thread pitches for bolt-on swaps in legacy aerospace panels. This alignment eliminates recalibration needs, maintaining flow coefficients above 0.3 and zero dead volume in multi-vendor hydraulic circuits.
Measure tube outer diameter and schedule, aligning to Superlok SAE dash charts for nut sizing and proper bite depth exceeding 0.010 inches. In high purity fluid processors, favor O-ring types to seal at velocities under 20 ft/s, dodging erosion and turbulence in gas chromatographs for cleaner separations.
Inventory flares release in 24 hours from U.S. depots, enabling same-day fulfillment for standard tube sizes and configurations. Bespoke angles or ports demand 2-4 weeks for precision forming, with rush flaring in 5 days to expedite repairs in offshore rig hydraulics and minimize downtime.
Superlok flares with reinforced sleeves absorb 10g accelerations per MIL-STD-810, ideal for clean-in-place instrumentation in vibrating mixers without seat cold-flow or loosening. Their robust design supports 50,000 flex cycles, ensuring vibration resistance in automotive test stands and industrial shakers.
Keep in desiccated bins at 60°F below 60% humidity, shielded from ferrous dust to protect flare lips from pitting initiation. Lint-free wraps with VCI emitters suit long holds up to 5 years, pre-inspecting seats for dents via profilometer to confirm corrosion-resistant performance in field rigs.
1/8-inch flares take 15 ft-lbs snug torque, scaling to 90 ft-lbs for 3/4-inch using torque multipliers to sidestep over-flattening in unions. Lubricate lightly for 15% uplift in torque capacity, ensuring uniform seating and helium-tight seals at 1×10^-7 scc/sec in dynamic assemblies.
Superlok variants operate to 800°F with non-O-ring seats, retaining 3,000 psig per ASME derates for reliable service in high-heat applications. This thermal capability suits steam tracing in cryogenic pressure systems, with no creep or oxidation after 1,000-hour exposure tests.
Probe flare lips for etched lot codes tying to digital mill test reports via app scan for full traceability from forging to finish. Handheld positive material identification flags fakes lacking 17% chromium, requiring etched certificates of compliance for trusted precise fluid control in test stands.

Industry Leaders Using Superlok

Superlok flared fittings are trusted by professionals in industries where secure, high-pressure connections are critical especially in systems exposed to vibration, temperature fluctuation, or repeated servicing. These fittings are widely used in HVAC, fuel systems, mobile hydraulics, refrigeration, aerospace, and industrial gas transfer.

Engineered for durability and precise fluid control, Superlok flared fittings are manufactured to SAE J514 and ISO 8434-2 standards, ensuring reliable performance under pressure. Their 37° flare seat provides a leak-tight seal that holds up in demanding environments, while the corrosion-resistant construction ensures long service life even in exposed or harsh operating conditions.

From maintenance crews retrofitting gas lines to OEMs building mobile machinery, Superlok flare fittings are chosen for their strength, compatibility, and vibration-resistant sealing. Their proven reliability across critical industries makes them a go-to connection solution when failure isn’t an option.

Superlok Advantage

IN-STOCK INVENTORY OF FLARED FITTINGS READY TO SHIP

SuperlokUSA maintains a deep inventory of 37° flared fittings, stocked and ready to ship across the U.S. From elbows and tees to O-ring and non-O-ring flare types, we carry a wide range of configurations to support urgent replacements and new builds alike. This reliable stock availability helps avoid long lead times often seen with Swagelok® and other suppliers. For industries working on HVAC systems, mobile hydraulics, or high-pressure gas lines, Superlok’s U.S.-based inventory ensures faster turnaround and less downtime so your team stays on schedule and your systems stay sealed.

FAST DELIVERY ANYWHERE IN THE U.S.

With fulfillment centers strategically positioned across the country, SuperlokUSA offers fast, dependable shipping on all flared fittings. We work with top logistics providers to ensure every order arrives on time, without the costly freight surprises that come from overseas or backordered sourcing. Whether you need a handful of flare adapters or a full line of fittings for a fleet or facility, Superlok gets them to your door quickly. Compared to the delays and unpredictability of Swagelok®, Superlok provides a faster, more responsive experience for high-pressure system designers and maintenance teams.

Request A Quote
Call Us (805) 658-2043
Request A Quote
Call Us (805) 658-2043