Lone Star Group

Dubai, United Arab Emirates

Computer controlled stock of petrochemical grade bolting for immediate dispatch

LoneStar is a leading global manufacturer, stockholder and distributor of petrochemical grade bolting and special fasteners for the Oil, Gas and Petrochemical industries.

With over 50 years experience supplying global OEMs, distributors and end users within the Petrochemical and Oil and Gas markets, LoneStar is able to offer a unique service of logistical supply and fastener solution management to industries which require quality and safety critical products with full traceability.

LoneStar studbolt and fastener assemblies are typically used in a range of Petrochemical and Oil and Gas applications. These include; pressure vessels, skids, heat exchangers, pumps, valves, actuators, wellheads, pipeline fabrications, petrochemical plants and drilling equipment.

High temperature fasteners for the power generation industry

LoneStar has built a reputation within the global energy marketplace for the worldwide supply of safety and quality critical bolting required by the Power Generation industry.

Forming supply partnerships with some of the world's leading gas and steam turbine manufacturers, LoneStar manufactures bespoke high temperature fasteners for a range of high pressure applications including compressors, valves, boilers and turbines.

Specific to high temperature fasteners and the power generation industry, LoneStar offers a number of in-house processes and services including:

• Deep hole drilling
• Ability to machine exotic materials
• Heat treatment and testing
• CNC machining
• 24 hour breakdown
• Reverse engineering
• CAD drawing

Quality critical fully traceable bolting for the subsea industry

Your industry is subject to harsh environmental conditions, demanding fasteners that are both fully traceable and documented for manufacturing processes with additional stringent testing that must often conform to your specifications.

For more than 50 years LoneStar has been manufacturing subsea critical bolting in accordance with the leading global providers of subsea technologies.

In order to stand out from our competition, we manufacture batch coded fasteners to 3.1 certification as standard and offer additional testing to your requirements to ensure full traceability and the highest quality.

Ring Joint Gaskets - suitable for high pressure and high temperature applications.

Ring Joint Gaskets are designed to seal by "initial line contact" or wedging action between the mating flange and the gasket. By applying pressure on the seal interface through bolt force, the softer metal of the gasket flows into the micro-fine structure of the harder flange material, creating a very tight and efficient seal.

LoneStar Ring Joint gaskets are manufactured in accordance with API-6A and ASME B16.20 specifications and come in four basic profiles:

R-Oval

Style R ring joint gaskets are manufactured in accordance with both API 6A and ASME B16.20 size/ratings. Available in both oval and octagonal configurations, both types are interchangeable on modern octagonal type grooved flanges.Style R Ring Joint gaskets can be manufactured in accordance with all relevant standards to suit the following flange designations: API- 6A, ASME/ANSI B16.5, MSS SP44 (ASME B 16.47 Series A) & BS 1560.

R-Octagonal

Style R octagonal ring joint gaskets are manufactured in accordance with both API 6A and ASME B16.20 size/ratings. Available in both oval and octagonal configurations, both types are interchangeable on modern octagonal type grooved flanges.Style R Ring Joint gaskets can be manufactured in accordance with all relevant standards to suit the following flange designations: API- 6A, ASME/ANSI B16.5, MSS SP44 (ASME B 16.47 Series A) & BS 1560.

RX

Style RX ring joint gaskets are a pressure-energised adaptation of the standard Style R gasket. The RX is designed to fit the same groove design as a standard Style R, making the joints interchangeable. The modified design uses a pressure-energised effect that improves the efficiency of the seal as the internal pressure of the system increases.

BX

Style BX ring joint pressure energised gaskets are manufactured in accordance with API 6A and are designed for use on pressurised systems up to 20, 000 PSI. When correctly fitted, the style BX gasket allows virtual surface-to-surface contact of the flange faces, which means that the gasket is fully trapped on both the inner and outer diameters. All BX gaskets incorporate a pressure balance hole to ensure equalisation of pressure that may be trapped in the grooves.

Kammprofile Gaskets are manufactured utilising a precision machined serrated insert sealing element with V-like cut grooves designed to entrap a sealing compound to create many individual seals across the face of a flange. The sealing element can be used stand alone in the case of a tongue and grove application or can incorporate a centering ring, either fixed or loose depending on the specific application.

Features & Benefits

• Tolerant of inconsistent bolttorquingor installation errors
• Rigid Construction makes them easy to install
• Low seating stress results in minimal damage to flange
• Small thickness of sealing layers allows for minimal fugitive emission
• Unlimited shelf life
• Can not be over compressed
• High Seal Integrity
• Available in a variety of materials

Kammprofile Gaskets offered by LoneStar are available in three profiles. The components can be produced from virtually any machinable material and can incorporate a variety of sealing faces selected based on media and temperature compatibility.

Spiral Wound Gaskets - suitable for fluctuations in pressure and temperature

Spiral Wound Gaskets are made of a preformed thin metallic strip combined with a soft sealing composite material, wound together under pressure to energise the sealing element to act like a spring when compressed between two flange faces. The sealing element can be used stand-alone or in conjunction with inner and/or outer rings depending on the application. Spiral wounds are available in a full range of styles and materials and are manufactured in accordance with ASME B16.20 for use in all industry flanges, including ASME/ANSI B16.5, ASME B 16.47, Series A & B.

Designed for tongue and grove applications, the style S gasket is a stand-alone sealing element where the ID is reinforced with several layers of metal winding, filler material is then introduce to offer greater sealing ability and the gasket is finished with several more layers of metal to help insure stability.

Style SI - Sealing Element with Inner Ring

The SI configuration is the same as the S except that a solid inner ring is utilised to prevent over compression. This design is also helpful in turbulent applications which are prone to cause erosion of the flange faces.

Flange Insulation Kits -sealing selections for applications where cathodic corrosion is a concern

Corrosion has long been natures most destructive element, but with LoneStar flange insulation products this costly profit robbing item can all but be eliminated. LoneStar engineered insulation products, of consistent high quality, can be used to control and confine electrolytic corrosion in almost every piping system. LoneStar insulation products are manufactured from materials with superior high dielectric strength, low water absorption and chemical stability to maintain the high quality required in refinery and chemical plant applications. Hydrocarbon exposure, weathering and salt water are no problem for LoneStar insulating materials. LoneStar quality assurance and high production rate allow our customers to economically protect and lengthen the service life of equipment with little or no down time due to electrolysis.
LoneStar manufactures a full line of standard flange insulation sets including Type F (Ring) gaskets, Type E (Full Face) gaskets and Type D (API Ring Joint) gaskets. LoneStar Type F and E gaskets are manufactured from 1/8" thick fabric based phenolic (Nema Grade CE) sheet with either no coating (plain faced) or a Nitrile rubber coating on both faces. Type F & E gaskets are also available in Compressed Non-Asbestos with superior electrical insulation qualities.


Insulation Kits

Flange insulating sets are packaged for one flanged joint, including gasket, sleeves and washers. Each flange set is securely packaged in a cardboard box, clearly labelled as to size, ASA Rating, style and material. Either polyethylene or phenolic sleeves are available with these insulating sets. Polyethylene sleeves are standard and will be furnished unless otherwise specified.

Whatever your requirement, LoneStar have the solution

Standard

LoneStar is known worldwide for its manufacture and stock holding of high performance fasteners, however we also supply a range of commercially available components as a result of managing and maintaining customer contractual requirements and consignment stocks.

We maintain an inventory of standard commercial ASTM, SAE fasteners and in the following materials:

Non Standard

LoneStar's leading manufacturing facilities enable us to manufacture and modify components to facilitate non standard fasteners to your bespoke requirements.

We can manufacture to drawings and employreverse engineeringto any sample provided by you with additional validation of dimensional, chemical and mechanical requirements.

Non standard fasteners are often project specific and can be manufactured in all types of materials on a lead time to suit your requirement.