Adhesives
Thermoplastic Composites Making An Impact
Product/process developments accelerate use of long-fiber-reinforced thermoplastics in automotive and industrial markets.
Read MorePre-Cured Sleeves For High-Pressure Pipes
Clock Spring is one of several composite wrap approaches developed by inventor Norman C. Fawley of NCF Industries Inc. (Santa Maria, Calif., U.S.A.). The concentrically-coiled, glass fiber-reinforced polyester composite sleeve was devised with support from the Gas Technology Institute and the gas pipeline indu
Read MoreDesign Issues
Typical FRP pipe is reciprocally filament wound with a fiber angle of ±54.75° relative to the longitudinal (0°) axis. This architecture satisfies stress loads in both the circumferential (hoop) and longitudinal (axial) directions for most pipes and pressure vessels. It withstands the in-use pressure, ther
Read MoreIssues With Design
Though steel is the traditional material for coiled tubing because of its low price, it is susceptible to corrosion, fatigue failure (caused by repeated coiling and uncoiling), and troublesome joints. In larger sizes, its weight can increase transport difficulties. With the advent of secondary recovery methods
Read MoreMaterial Selection And Properties
The design process starts with determining the functional requirements of the component part. These requirements include: • Mechanical properties — tensile, compressive and flexural strength; elongation, impact resistance, hardness, density. • Electrical properties — dielectric strengt
Read MoreCustom Wet Layup Repair Solutions
In the second group are customized repairs, employing glass or carbon reinforcement, wet out with vinyl ester, polyester or epoxy resin and applied to the pipe by trained personnel, have been available since the mid-1990s. Selection of reinforcement material, wrap thickness and overlay length is dictated by th
Read MoreComposites Used For Repair by Statoil
Statoil has used composites to repair steel topside components for more than 10 years on the Statfjord and Gullfaks platforms, using wet layup methods designed for each application, says Melve. “We repaired four water lines at an onshore oil storage facility between 1983 and 1987,” he says. “After nine years,
Read MoreDesign Issues with Repair
The ability to repair in place, rather than replace, critical platform equipment systems like topside piping, flowlines and structural components is an attractive option for a platform operator. Composite piping is easily repairable using the same basic methods as the initial installation, says Kevin Schmit, m
Read MoreComposite Accumulator Bottles Perform In Service
A riser tensioning system for a TLP consists of a tensioning ring and framework, with four to eight hydraulic cylinders — each with an attached pressure vessel or “accumulator bottle” — to support and allow movement of the rigid riser pipe. Installed in the riser wellbay, this primary structural system is desi
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