Quantcast Sealing Compound MIL-S-8802

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
Careful planning is necessary to close faying surface seals on large assemblies within the application time limit of the sealant. Once the sealant has been applied, the parts must be joined, the required number of bolts must be torqued, and all the rivets driven within this time limit. When insulating tape has been installed between the faying surfaces to prevent dissimilar metals contacts, pressure sealing should be accomplished by fillet sealing. Fillet sealing is the spreading of sealant along the seam with a sealant injection gun. The sealant should be spread in approximately 3-foot increments. Before you proceed to the next increment, the applied portion of the fillet should be worked with a sealant spatula or tool. See figure 14-45. This working of the sealant fills the voids in the seam and eliminates air bubbles. The leak-free service life of the sealant is determined by the thoroughness and care you use in working out the air bubbles. After the sealant has cured to a tack-free condition, the fillet should be inspected for any remaining air bubbles. Such air bubbles should be opened and filled with sealant. When a heavy fillet is required, it should be applied in layers.   The top layer should fair with the metal. Injection sealing is the pressure filling of openings or voids with a sealant injection gun. Joggles should be tilled by forcing sealant into the opening until it emerges from the opposite side. Voids and cavities are filled by starting with the nozzle of the sealant injection gun at the bottom of the space and filling as the nozzle is withdrawn. Figure 14-45.—Applylng sealant. NOTE: A joggle is a joint between two pieces of material formed by a notch and a fitted projection. Rivets, rivnuts, screws, and small bolts should have a brush coat of sealant over the protruding portion on the pressure side. Washers should have a brush coat of sealant on both sides. Split grommets should have sealant brushed into the split prior to installation. After installation, fillets should be applied to both the base of the grommet and the protruding tube in the pressure side. Sealing Compound MIL-S-8802 This  temperature-resistant,  two-component, synthetic rubber compound is used for sealing and repairing fuel tanks and fuel cell cavities. This compound is designed for an operating environment that may vary between -65°F and +250°F. It is produced in the following classifications: Class A —Sealing material suitable for brush application Class B—Sealing material suitable for application by extrusion gun and spatula Class C — Sealing material suitable for faying surface sealing Dash numbers after the classification code indicate the allowed application time in hours before the curing cycle will have progressed to the point where it is no longer feasible to apply that particular batch of sealant. Class A dash numbers are –1/2 and –2. Class B dash numbers are –1/2, –2, and –4. Class C dash numbers are –20 and –80 (8 hours of application time with the remaining time allowed for working the material). Example: Class A-2 designates a brushable material having an application time of 2 hours. Class B-1/2 designates an extrusion gun material having an application time of 1/2 hour. Class C-20 designates a faying surface sealant with an application time of 8 hours and a working life of 20 hours. Sealing Compound MIL-S-81733 This accelerated, room temperature, curing synthetic rubber compound is used in sealing metal components on weapons and aircraft systems for protection against corrosion. This sealant contains 14-47



Aviation News
Airbus and Oracle Team USA: one step closer to the 2017 America’s Cup yacht race
Airbus’ technology partnership with the Oracle Team USA sailing squad...
airbus.com
Airbus A350 XWB – Welcome and “Grüß Gott” in Munich
First visit of an A350 XWB to Munich International Airport...
airbus.com
Airbus increases A320 rate, adjusts A330 for NEO transition
Airbus has decided to further increase the production rate for...
airbus.com
CPI Scores $49 Contract to Provide US Air Force T-38C Modification Kits
[Avionics Today 02-27-2015] CPI Aerostructures has won a $49 million...
aviationtoday.com
Lockheed Martin Upgrades Royal Australian Air Force C-130J Maintenance Training
Lockheed Martin C-130J virtual maintenance trainer. Photo: Lockheed Martin [Avionics...
aviationtoday.com
CPI Scores $49 Million Contract to Provide US Air Force T-38C Modification Kits
[Avionics Today 02-27-2015] CPI Aerostructures has won a $49 million...
aviationtoday.com
Airbus A350 XWB makes its “première” in Paris
Xtra mature, reliable, innovative, efficient, comfortable Share this Read more...
airbus.com
Raytheon to Support US Air Force Aicraft Integration, Life Cycle
[Avionics Today 02-26-2015] The U.S. Air Force has awarded a...
aviationtoday.com
Raytheon to Support US Air Force Aircraft Integration, Life Cycle
[Avionics Today 02-26-2015] The U.S. Air Force has awarded a...
aviationtoday.com
ViaSat Upgrades Airborne ISR for Canadian Department of National Defense
[Avionics Today 02-26-2015] The Canadian Department of National Defense is...
aviationtoday.com
Saab Selects AEL Sistemas as Avionics Systems Supplier on Gripen NG Fighter
Saab Gripen NG. Photo: Saab AB [Avionics Today 02-25-2015] Saab...
aviationtoday.com
Orbital ATK Completes Installs for South Korean Aircraft Survivability Equipment
[Avionics Today 02-25-2015] Orbital ATK has completed the installation and...
aviationtoday.com
Borealis Alliance: Upping ATM Efficiency through Free Route Airspace
Branka Subotic, executive director of the Borealis Alliance. Photo: Borealis...
aviationtoday.com
Blakey Departs AIA
[Avionics Today 02-24-2015] Marion Blakey will be leaving her post...
aviationtoday.com
Jonal Laboratories Inks Contract with Pratt & Whitney as Production Ramps Up
Jonal Laboratories has signed a long-term agreement with Pratt &...
aviationtoday.com
Rockwell Collins’ New Office Extends Reach in the Middle East
Rockwell Collins has recently expanded its presence in the Middle...
aviationtoday.com
Rockwell Collins Completes Sydney Facility Expansion for DAS Production
Rockwell Collins F-35 DAS. Photo: Rockwell Collins [Avionics Today 02-20-2015]...
aviationtoday.com
Airbus Helicopters Confirms Commitment to Middle East Armed Forces
 Airbus Helicopters recently reinforced their presence in the Middle East...
aviationtoday.com
Engility Wins Contract to Test and Integrate New Avionics into Navy Systems
[Avionics Today 02-20-2015] Engility Holdings won a $27.6 million contract...
aviationtoday.com
Airbus selects the 100 teams for Round Two of the Fly Your Ideas global student challenge
Strong showing from Asia Pacific, Europe and the Americas Share...
airbus.com


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +