With the current increment in Oil and Gas costs and the anticipated production decline of developed fields, reserves comprising large quantities of destructive species working at high pressure and temperature, are becoming progressively appealing and economical to develop.
CLAD is a complex technology of metallurgy for two types of metals. Crystal Industrial from India can create overlay welding on most carbon, low alloy, stainless steel and different steels with a range of corrosion tolerant alloy comprising Inconel®, Incoloy®, Monel®, Hastelloy®, stainless steel and hard facing steels. Advantage from Crystal Industrial’s latest computer managed welding stations from India; we provide low thinning of alloy deposite. Continuous video observing and recording system ascertain flawless tie in and weld path.
Operation security and preservation of the surrounding conditions are always the primary concern for pipeline engineers. The strict prerequisites of the business are conventionally ensured through choice of appropriate materials e.g. carbon steel or corrosion resistant alloys. The selection is done on the basis of physical attributes, expense and life cycle investigation.
Because of their extremely good track record and low cost advantages, the interest for seaward clad pipes has increased quickly. Clad pipe producers utilize a number of generation techniques and cover a wide scope of sizes, however, larger diameters capacity is restricted. To handle this issue, Crystal Industrial from India has effectively created clad pipes, produced utilizing special procedure. To support this improvement Crystal Industrial from India has recently spent on modern production equipment.
This paper investigates the study performed to prove the capacity to deliver huge diameter clad linepipe utilizing the special generation procedure, through which the paper states the production of metallurgically clad plates, into longitudinally submerged arc welded pipes at our Pipe Factory. The report recognizes the manufacturing course and science of common feedstock material, followed by the producing route inside the pipe mill, the choice of welding procedure for the substitution of the CRA layer, and lastly, the mechanical characteristics of the pipe material are exhibited.
High strength low alloy steels (HSLA) for example, carbon steel linepipe show erosion rates of around 0.2 mm.yr-1 (under ecological conditions, for example, 10 bar CO2 @ 60°C), while CRA materials would show = 0.005 mm.yr-1, under similar conditions. This would mean for a 30 year durability of a pipeline, a surface thickness loss of 6 mm would happen for the HSLA steel, while the CRA would lose around 0.15 mm.[1].
This difference in corrosion tolerance between carbon steel and CRA materials, additionally to the improvement of oil and gas fields, where the parameters of the line/liquid lead to a rise in the “corrosive activity” of Chloride particles, Hydrogen Sulfide, and Carbon Dioxide, have brought about a rise in the requirement for CRA pipe material. Previously, carbon steel pipe material has been utilized for such technologies and the below mentioned corrosion relief measures are required to be applied amid the functioning of the pipeline, i.e.
• Use of carbon steel pipe material with the infusion of inhibitors – can be troublesome due to changes in impact of the inhibition and downtime of the pipeline.
• Use of carbon steel pipe material after desulphurisation and dehydrogenation.
These measures are costly, and hard to maintain at the desired level to assure minimum, or no corrosion. Corrosion resistant alloys (CRA) incorporate austenitic and martensitic stainless steels, nickel-based, and titanium-based amalgams. As the corrosion of the solution rises, the expense and technical problems related with the initial three choices also increases.