Sigma Fasteners

Manufacture and Distribute Fasteners for Energy

Phone: (281) 214-8800
Fax: (281) 214-8801

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Powder Coating

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Sigma Fasteners Industrial Coating Service

Powder Coatings

There are two main categories of powder coatings – Thermosets and thermoplastics. The thermosetting, when baked  reacts with other chemical groups in the powder polymer and  improves the performance properties. The thermoplastic variety does not undergo any additional reactions during the baking process, but flows out into the final coating.

Sigma is able to apply used are polyester powder, TGIC powder, polyester-epoxy hybrid powder, Fusion bonded epoxy powder, Nylon powder and acrylic powder.

Powder Coating Info

Xylan Coating

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Xylan Industrial Coating Service

Xylan coating prevents leaks past thread
Pressure vessels, valves, pipe unions, storage tanks, reactors, pipelines and other fluid containment equipment are often fitted with threaded plugs for inspection, pressure relief, filling or tapping.

Coatings on pipe plugs not only improve their performance and reliability but also make them easier to use. A thin film of Xylan eliminates the PTFE tape normally wrapped around the threads to seal them.

In addition, the corrosion protection and low-friction properties of the coating greatly reduce breakout torques, enabling users to remove the plugs at a later date without destroying them.

In most instances, the pipe plugs may be re-used without difficulty.

Xylan coatings are also available in many colors, enabling users to color-code particular plug sizes and alloys.

Xylan 1014

Main Properties:

High temperature resistant. Low coefficient of friction. Abrasion / wear resistant. Dry film lubricant. Thermoset. Wide use temperature.

Typical Applications: Any mating surface which requires lubrication. Hinge pins. Piston casing. Compressors. Fasteners.

Description: Resin-bonded, thermosetting, dry-film lubricant which, when compared to Xylan 1010 contains significantly more bonding resin relative to its content of PTFE lubricant. Altering the formula in this manner produces finishes which are harder, more abrasion resistant, glossier, and less porous. Frictional values remain low and very predictable.

Working temp. range (continuous) -195°C/-320°F to 260/500°F Working temp. range (intermittent) -195°C/-320°F to 285°C/545°F

Xylan 1052

Main Properties:

High temperature resistant. High load carrying capacity. Abrasion / wear resistant. Thermoset.

Typical Applications: Applications to prevent wear of mating surfaces under extreme load such as bearings, sealing rings, and valve springs.

Main Properties:

High temperature resistant. Low coefficient of friction. Abrasion / wear resistant. Thermoset. Wide use temperature. Corrosion resistant. Controlled torque.

Typical Applications: Threaded fasteners.

Description: Resin-bonded, thermosetting, dry film lubricant. It is formulated for high-pressure, low-speed wear applications and provides long-term lubrication for bearing surfaces subjected to extreme pressures, up to 150,000 psi (10,500 kg/cm2). The coating utilizes a unique dual lubrication system of PTFE and MoS2 and is superior to  moly greases which wash away and PTFE coatings which  cold flow. Resin-bonded lubricants in Xylan 1052 stay on the job, even in harsh chemical environments.

Working temp. range (continuous) -195°C/-320°F to 260°C/500°F Working temp. range (intermittent) -195°C/-320°F to 285°C/545°F

Xylan 1070

Main Properties:

High temperature resistant. Low coefficient of friction. Abrasion / wear resistant. Thermoset. Wide use temperature. Corrosion resistant. Controlled torque.

Typical Applications: Threaded fasteners.

Description: Resin-bonded, thermosetting, PTFE based, dry-film lubricant. It has extra corrosion protection and issued to coat large studs (B7), nuts, flanges, and related hardware for sub-sea and splash-zone service. Because of its predictable, low-friction properties, less make-up torque is required to produce the specified tension. During assembly, clamp loads are increased; scatter is reduced. In fact, the frictional characteristics are the most predictable of any lubricant, coating, or plating used on bolting. The low friction properties also reduce break-out torque, which allows removal of bolting with a wrench instead of a blowtorch.
Application: Conventional spray.

Working temp. range (continuous) -195°C/-320°F to 260°C/500°F
Working temp. range (intermittent) -195°C/-320°F to 285°C/545°F

Xylan 1400

Main Properties:

Corrosion resistant. Chemical resistant. Weathering resistant. Acid rain resistant.

Typical Applications: Threaded fasteners for the building, chemical process, oil and off shore industries.

Description: A recoatable “RC” coating developed to protect large fasteners and chemical processing equipment from chemical exposure (especially those with high pH). Although it contains a small percentage of PTFE lubricant to facilitate installation and prevent galling, it is considered a barrier coating rather than a dry film lubricant.

Working temp. range (continuous) -50°C/-58°F to 175°C/350°F

Xylan 1424

Main Properties:

Dry film lubricant. Corrosion resistant.

Typical Applications: Any mating surface which requires lubrication. Hinge pins. Piston casing. Compressors. Threaded fasteners. Description: This VOC compliant*, resin-bonded, PTFE based coating is primarily formulated for use on fasteners to prevent corrosion and facilitate make-up torque.

Working temp. range (continuous) -50°C/-58°F to 175°C/347°F
Working temp. range (intermittent) -50°C/-58°F to 200°C/392°F

More Xylan Inforamation

Moly Coated Bolts

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Moly Coated Bolts

Molybdenum disulfide coated bolts are commonly used to improve the performance in extremes of load carrying capacity, operating temperature and coefficient of friction. This coating provides effective lubrication in a wide range of loads, in many cases exceeding 250,000 psi. Moly coatings lubricate sacrificially by transferring lubricant between the two mating surfaces, which helps to reduce both wear and the coefficient of friction.

Moly coatings are a combination of molybdenum disulfide lubricant and high performance resins. The coating is thermally cured to bond thoroughly with the base metal of the coated part.

Moly coated bolts can solve problems associated with corrosion, chemical exposure, and abrasion. offer excellent corrosion and chemical resistance and a barrier protection better than phosphate. With Moly’s exceptional barrier protection, it is appropriate for more severe environments and is often used in chemical processing and oil field equipment.

SermaGard

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SermaGard Industry Coating Service

SermaGard ® – An exclusive family of coating products marketed in automotive aftermarket and offshore oil applications.  SermaGard provides corrosion, lubrication, and release performance characteristics as well as UV resistance  in offshore applications.  In use for over a quarter century.

SermaGard is a two part system

SermaGard 1105 Base coat – a ceramic metallic aluminum filled water based coating cured then burnished

SermaGard 1280 Top coat – a silver top coat designed to enhance the corrosion resistance of the base coat in the system

Tap End Stud – AWHEM Recommendation

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D Diameter – Nominal Stud Sizes

Tap End Stud
Tap End Stud

L Length – Measured end to end
T For 6B & 6BX studded flange connections with R, RX & BX gaskets, thread length maximum on end = 1 diameter + 1.5 pitch + 1/16-0
N Nut end thread length for 6B & 6BX studded flange connections with R, RX & BX gaskets shall be 2-1/2 diameters of full thread minimum.
* Class of Threads – Tap end threads may be furnished in any class thread specified. Nut end threads shall be American Standard Coarse or Fine series, Class 2A or 8 UN.

When ordering, please specify:
Diameter (D); Length (L); End-to-end dimension. (If length is figured first thread to first thread, order
must so specify.)
Tap end thread length (T) and thread series
Nut end thread length (N) and thread series

Double End or Tap End Studs are available in either rolled or cut threads. When the threads are rolled,
the full thread dimensions will increase slightly, and the diameter of the bodies will be undersized to the
pitch diameter of the thread.
Tap End Studs are available in ASTM A193 Grades of material or special materials. Sigma stocks the most
frequently used sizes of tap end studs in ASTM A193 Grade B7. Tap end studs can also be plated or
coated if allowances are made for coating thickness and thread fit.

Prints should be furnished on Double end or Tap End studs whenever possible.
** American Association of Wellhead Manufacturers –

TECHNICAL REPORT TR9501 Revision A

RECOMMENDATION FOR INTERCHANGEABLE STUD BOLTS AND TAP END STUDS FOR API SPEC 6A FLANGES

Two Additions to Team Sigma

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Houston, TX (December 2, 2016) – Sigma Fasteners, Inc. announced today that Jon Sellers and David Murphy have joined the business to further develop the growth of our regional and national accounts. The two new additions both join Sigma with over 25 years of fastener experience under their belt.

Jon comes to Sigma having spent 17 years working at Alloy and Stainless and David joins Sigma with a wealth of experience gained from Highland Threads, Texas Screw Products, and Alloy and Stainless over the years. Both David and Jon began in the industry in the early 90’s and are looking forward to continuing their success at Sigma.

David and Jon join Sigma as National Accounts Representatives to continue Sigma’s strategies in selling engineered high performance fasteners in and around the gulf coast region and across the nation.

David and Jon’s wealth of experience and industry knowledge has already made them key additions to the Sigma Fasteners family. We view this choice as a sign of our commitment to being a leading company in our industry. Our commitment to quality and the increasing demand from our customers led us to look for new additions to our team who will fit in with our philosophy of quality and exceptional service, and it is very fortunate that we were able two exceptionally high caliber candidates to fulfill these roles. Pat Garrett, Director of Sales states, “I’m confident that Jon and David will play a key role in providing exceptional and high quality solutions for our customers.”

About Sigma Fasteners: Headquartered in Houston, Texas, Sigma is one of the most trusted fastener and specialty bolt suppliers in the world, committed to first-class quality products and service. Sigma Fasteners, Inc. relies on investing in its people, leading technology and state-of-the-art manufacturing facilities to produce the engineered products to custom specifications which serve petroleum refining, petrochemical, power generation, and pulp and paper industries.

For additional information, visit www.sigmafasteners.com, Email: sales @ SigmaFastneners.com, or call +1 (281) 214-8800.

 

Pat Garrett – Direct (281) 214-8839 Email patg @ SigmaFasteners.com

Jon Sellers – Direct: (281) 214-8838 Email: jons @ SigmaFastneners.com

David Murphy Direct (281) 214-8877 Email: davidm @ SigmaFastneners.com