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Extra-Span-Shield

Extra Span Shield

Extra Span Shield


The Extra Span type shield (formerly known as the Mini ES Shield), as a product, sits between the Mini type shield and the Ladder type shield.

The Extra Span type shield is used as a permanent solution for protect both personnel and equipment from the harsh weather conditions experienced both onshore and offshore in the oil and gas industry.

They are of a single layer construction but can be altered to provide a double layer of protection. Intended for protection of key equipment and in areas where personnel will not come into direct contact with the radiant shields.

The shield is of a single layer construction which can reduce the wind speed by up to 62% without affecting light transmission and ventilation. This can be further expanded by adding an additional layer which will reduce the wind speed by up to 72%. Protection against radiant heat is also provided.

The Extra Span Shield has been successfully tested to wind speeds in excess of 100mph.

Product Features


Key Features

  • Independently tested up to 20 kW/m2
  • Heat flux reduction in excess of 80% at 300mm behind the shield
  • Designed primarily for protection of equipment
  • Able to span large distances between supporting steelwork
  • Uses the same heavy duty radiant mesh as Ladder shields
  • All stainless steel type 316L construction
  • Lower cost and weight
  • Excellent light transmission and ventilation
  • Quick onsite installation and removal, supplied complete with all necessary A4 Stainless Steel fasteners
  • Load tested up to 8.2 kN/m2

Click to download the PDF Data Sheet for Locker Extra Span (formerly Mini ES) Heat Shield.

Key Features

  • Wind efficiency 62% (72% with additional layer)
  • Independently tested at wind speeds in excess of 100mph (87knots/h)
  • Able to span large distances between supporting steelwork
  • All stainless steel type 316L construction
  • Ideal for permanent wind and weather protection
  • Excellent light transmission and ventilation
  • Quick onsite installation and removal
  • Supplied complete with all necessary A4 Stainless Steel fasteners

Extra Span Shield: Wind Speed Reduction Test Results

Free Flow
Wind Speed
Speed Recorded
Behind Shield
Total Reduction
in Speed
Percentage
Reduction
Max
Deflection
(mph)(mph)(mph)(%)(mm)
5317366814.8
8231516233.3
8732556348.5
9435596361
9737606269.6
10138636276.5

Tabulated values are extracted from Test Report No. R11918. On completion of the wind speed test the shields were fully inspected and no evidence of damage was identified.

Click to download the PDF Data Sheet for Locker Extra Span (formerly Mini ES) Wind Shield.

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Ladder Shield

Ladder Shield


The "Ladder" shield consists of dual skin shielding media attached to both sides of a ladder frame to provide maximum protection in areas where personnel may come into contact with the shield, such as Stair tower and Derrick areas.

Robust construction - primary radiant shielding incorporates heavy duty woven mesh for maximum heat flux reduction.

Key Features

  • Independently tested up to 60 kW/m2
  • Heat flux reduction in excess of 80% at 150 mm distance behind the shield.
  • Rolled Hollow section framework gives high resistance to wind buffeting.
  • All stainless steel type 316L construction.
  • Able to withstand continuous thermal cycling.
  • Excellent light transmission and ventilation.
  • Good protection against wind and snow.
  • Quick on site installation and removal, supplied complete with all necessary A4 Stainless Steel fasteners.
  • Mesh proven to reduce wind speed by over 70%
  • Load tested to 24 kN/m2

Single Skin Ladder Shield: Wind Speed Reduction Test Results

Free Flow
Wind Speed
Speed Recorded
Behind Shield
Total Reduction
in Speed
Percentage
Reduction
Max
Deflection
(mph)(mph)(mph)(%)(mm)
55262952.714
60352541.720
65362944.626
70363448.633
75383749.335
80384252.538

Double Skin Ladder Shield: Wind Speed Reduction Test Results

Free Flow
Wind Speed
Speed Recorded
Behind Shield
Total Reduction
in Speed
Percentage
Reduction
Max
Deflection
(mph)(mph)(mph)(%)(mm)
55154072.718
6018427023
65204569.231
70205071.433
75235269.335
80225872.536

Tabulated values are extracted from Test Report No. R11918

On completion of the wind speed test the shields were fully inspected and no evidence of damage was identified.

Click to download the PDF Data Sheet for Locker Ladder Heat Shield.

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Flare Deck Shield

Flare Deck Shield


Key Features

  • Open grid serrated floor panel bolted to heavy duty woven mesh ladder type heat shield
  • Mesh aids cooling and allows free movement of air and liquids
  • Available in stainless steel type 316L and Incoloy 800HT
  • Designed to withstand evenly distributed load of up to 20 kN/m2
  • Tested to front face surface temperature of 700°C.
  • Temperature reduction of 87% on supporting steelwork
  • Penetrations and kick plates incorporated as required.
  • Grid floor panels removable from top working surface
  • No special tools required

Click to download the PDF Data Sheet for Locker Flare Deck Heat Shield.

Why is a Flare Deck Heatshield Required?

Flare deck heat shielding is a crucial component designed to protect personnel, equipment, and surrounding infrastructure from the intense heat generated by flaring operations on offshore drilling rigs. Flaring is the controlled burning of excess gases and hydrocarbons released during oil and gas production that cannot be otherwise used, and it produces a significant amount of heat that can pose various safety and operational risks.

The heat-shielding system is typically installed on top of the flare deck structure. It consists of an open grid serrated floor panel, bolted to heavy duty woven mesh ladder type heat shield. Construction is typically in all stainless steel 316L although other high temperature material can be used as required.

The Benefits of Locker Flare Deck Heatshield

One key feature of Locker offshore rig flare deck Heatshielding is its ability to withstand a front face surface temperature of 700 °C with an 87% reduction on the temperature recorded on the rear supporting steelwork. Metal mesh aids cooling and allows free movement of air and liquids. This whole structure is designed to reduce radiant heat exposure to critical components and personnel located below the flare deck. This design prevents excessive radiated heat exposure, minimising the risk of fire hazards and thermal damage to nearby equipment and structures.

In addition to radiant heat reduction, the Locker heatshield system is designed to withstand a universally distributed load of 5kN/m² as standard. Penetrations and kick plates can be incorporated as required.

Furthermore, the offshore rig flare deck Heatshielding is designed to be durable and resistant to harsh offshore environmental conditions, including corrosive saltwater, strong winds, and UV radiation. It undergoes rigorous testing and complies with industry standards and regulations to ensure its effectiveness and longevity in offshore settings.

Overall, the offshore rig flare deck Heatshielding is an essential safety measure, providing a critical barrier between the intense heat generated during flaring operations and the personnel, equipment, and infrastructure on offshore drilling rigs. It plays a crucial role in maintaining safe working conditions, protecting assets, and minimizing the potential risks associated with high-temperature flaring activities.

Summary of Benefits

  • Designed to incorporate complex shapes to fit around flare and ignition piping, pad eyes and davits as required.
  • 316L SS Flare Deck Heatshields have been front face tested to 700°C with resultant temperature of 92°C recorded on supporting steelwork behind the Heatshield.
  • Heatshields tested up to 90kW/m² with a reduction in excess of 80% behind the shield.
  • The use of radiant mesh as opposed to perforated plate results in lower noise generated through the Heatshields, which will be less than 75dBA at 25m/s
  • Manufactured as standard in 316L SS. Also 310S and Alloy 800H / HT can be provided if required.
  • Standard grating consists of 30 x 3mm bearing bars spaced at 44.44mm c/c with 15 x 2mm transverse bars spaced at 99.99 mm c/c with a single layer of 6.38mm aperture Radiant Mesh welded to the underside. Alternative grating configurations can also be accommodated.
  • Total combined weight of support frame and standard grid floor is 42kg/m² - 316L SS and 50kg/m² - 310S and Incoloy 800H / HT
  • Standard Uniform Distributed Load (UDL) of 5kN/m² up to 20kN/m² to accommodate placement of equipment on the top surface. Higher loads can also be accommodated and designed into the Heatshields as required. Loadings are based on Locker standard grating specification (44.44 x 99.99).
  • Flare Deck Shields are installed from the top surface with the radiant mesh welded to the underside of the serrated flooring, preventing dropped objects from passing through the flooring and reducing the need for rope access personnel during change out.
  • Can be easily installed in the Horizonal or Vertical planes as required.
  • Panels can be easily removed for transportation from shipyard to site.
  • Woven wire mesh promotes free movement of air and liquids.
  • Access hatches easily incorporated with no trip hazards.
  • Maintenance free for the lifespan of the project.
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