Surface Guide
Disc Spring Surface Protection and Corrosion Control
Understand when disc spring surface protection matters, and how coatings, plating and environmental exposure affect preload retention and service life.
Read GuideFlange Washers Manufacturer | Live Loading RFQ
Request flange washer and live loading Belleville washer RFQs for refinery, petrochemical and power plant bolting where preload loss or leakage risk matters.
Engineered for Reliable Load Control
Request flange washer and live loading Belleville washer RFQs for refinery, petrochemical and power plant bolting where preload loss or leakage risk matters.
- Live loading washer geometry by bolt size
- Load data at full working deflection
- Material sets for stainless, nickel alloy and tool steel service
If you need to estimate load, deflection or stack arrangement, use the Disc Spring Design Calculator before sending drawings for engineering review.
Standard Sizes
Live loading flange washer ranges for bolt sizes 5/16 in to 4 in, with 17-7PH, Inconel 718 and H13 series.
Materials
17-7PH stainless steel, Inconel 718 nickel alloy and H13 tool steel.
Temperature Range
Material-dependent ranges for moderate corrosion, HPHT and high-temperature flange service.
Recommended Applications
- Petrochemical flange live loading
- Power plant piping systems
- Refinery bolted joints
- Leakage control for process valves
RFQ DATA CHECKLIST
Send the application data engineers need first
For a faster quotation, include the basic spring geometry, target load and service condition. If a value is not confirmed yet, send the drawing or installed photos and mark it as estimated.
- OD / outside diameter
- ID / inside diameter
- Thickness and free height
- Material or working environment
- Quantity and delivery target
- Target load and working deflection
- Working temperature
- Application, drawing or photos
Key Product Data
17-7PH: 33 part numbers
Inconel 718: 37 part numbers
H13: 66 part numbers
Bolt size 5/16 in to 4 in
Live Loading Washer Specification Examples
| Series | Part no. | Bolt size | ID min. (in) | OD max. (in) | Thickness (in) | Deflection (in) | Load (N) |
|---|---|---|---|---|---|---|---|
| 17-7PH | FT-177-001 | 3/8'' | 0.386 | 0.714 | 0.083 | 0.008 | 2800 |
| 17-7PH | FT-177-005 | 5/8'' | 0.64 | 1.148 | 0.125 | 0.012 | 6400 |
| 17-7PH | FT-177-033 | 3'' | 3.031 | 5.36 | 0.468 | 0.069 | 88000 |
| Inconel 718 | FT-NAS-001 | 5/16'' | 0.322 | 0.58 | 0.077 | 0.005 | 2450 |
| Inconel 718 | FT-NAS-006 | 5/8'' | 0.644 | 1.148 | 0.125 | 0.012 | 6400 |
| Inconel 718 | FT-NAS-037 | 2'' | 2.063 | 3.6 | 0.318 | 0.045 | 40150 |
| H13 | FT-H13-001 | 1/2'' | 0.515 | 1.011 | 0.12 | 0.013 | 4245 |
| H13 | FT-H13-066 | 4'' | 4.054 | 7.135 | 1.359 | 0.058 | 642053 |
The live loading range covers 17-7PH stainless steel, Inconel 718 nickel alloy and H13 tool steel series.
Live Loading Material Series
| Series | Material focus | Typical use | Available range |
|---|---|---|---|
| 17-7PH stainless steel | Corrosion resistant stainless | General flange bolting and moderate corrosion service | 3/8 in to 3 in bolt size |
| Inconel 718 nickel alloy | High strength nickel alloy | HPHT, offshore and severe corrosion service | 5/16 in to 2 in bolt size |
| H13 tool steel | Heat-stable tool steel | High-load, high-temperature flange service | 1/2 in to 4 in bolt size |
Live loading washer procurement notes
Live loading washer supplier, flange washer manufacturer, flange washer RFQ and Belleville washer for flange bolting requests are usually tied to leakage risk, gasket relaxation and bolt preload loss.
A useful RFQ should include bolt size, flange standard, gasket type, target load, temperature cycle, media, available washer space and whether the joint is refinery, chemical, power plant or offshore service.
Material selection often starts with 17-7PH stainless, H13 or Inconel 718 depending on corrosion, temperature and retained-load margin.
Related Technical Guides
Reliability Guide
Disc Spring Preload Loss and Stress Relaxation
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Read GuideTroubleshooting Guide
Prevent Disc Spring Failure: Preload Loss, Cracking and Stack Problems
Trace preload loss, cracking, stack instability and corrosion back to the design, material and assembly decisions that usually cause disc spring failure.
Read GuideQuotation Guide
What to Prepare for a Live Loading Washer RFQ
Prepare stronger live loading washer RFQs by organizing bolt, gasket, temperature and preload information before discussing flange or valve spring stacks.
Read GuideApplication Guide
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SKD61 and 8407 Supreme Heat-Resistant Disc Springs
Understand how SKD61, H13 and 8407 Supreme hot-work steels are reviewed for heat-resistant disc springs in high-temperature industrial assemblies.
Read GuideNickel Alloy Guide
Nickel Alloy Disc Spring RFQ Guide
Compare custom Alloy 718 springs, Inconel 625, Inconel X-750 and Nimonic 90 disc springs for US supplier RFQs, HPHT valves and offshore service.
Read GuideBolting Guide
DIN 6796 Disc Washer Supplier | Heavy Duty Bolting RFQ
Review DIN 6796 disc washers for bolted joints, preload retention, electrical connections, structural fastening and supplier or wholesale RFQs.
Read GuideIndustry Guide
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Read GuideIndustry Guide
Belleville Washers for Offshore Oil & Gas
See how Belleville washers are applied in offshore oil and gas equipment where corrosion, pressure and long maintenance intervals demand stronger load-retention performance.
Read GuideSealing Guide
Flange Live Loading Disc Springs for Bolt Load Loss and Leakage Risk
See how flange live loading disc springs keep more useful bolt load after gasket relaxation, thermal cycling and vibration in petrochemical and process piping joints.
Read GuideApplication FAQ
How Disc Springs Help Reduce Valve Leakage
See how disc spring stacks support valve packing load, compensate for relaxation and help reduce leakage risk in industrial valve systems.
Read GuideSizing FAQ
Live Loading Washer Sizing Basics
Learn the practical inputs behind live loading washer sizing for flange and valve bolting, including bolt size, travel, target load and service severity.
Read GuideDesign FAQ
Common Disc Spring Stacking Mistakes
See the disc spring stacking mistakes that change force, travel, alignment and service life in series, parallel and mixed Belleville washer packs.
Read GuideStandards Comparison
DIN 2093 vs DIN 6796 Washers | Supplier RFQ Guide
Compare DIN 2093 disc springs and DIN 6796 disc washers for supplier RFQs, heavy-duty bolting, force-deflection control, wholesale and repeat purchasing.
Read GuideDownload Library
Disc Spring RFQ Downloads | Catalog, Checklist and Stack Worksheet
Download FeTech disc spring catalog resources, RFQ checklist, stack worksheet and material guides for DIN 2093, Belleville washers and custom springs.
Read GuideCommon Product Questions
What problem do live loading flange washers solve?
They help reduce bolt load loss caused by gasket relaxation, thermal cycling and settlement, especially where leakage control matters.
Can flange live loading washers be selected only by bolt size?
Bolt size is important, but sealing duty, temperature, gasket behavior and available travel are all needed for a proper live loading review.
When should Inconel 718 flange washers be considered?
Inconel 718 is commonly reviewed for HPHT, offshore, refinery and severe bolting applications where ordinary steel or stainless may lose load margin too quickly.
What should a flange washer RFQ include?
Send bolt size, flange standard, gasket type, target bolt load, temperature cycle, media, available washer space, material preference and quantity. This gives FeTech enough information to review flange washer or Belleville flange washer supplier requests as a quote-ready live loading project.