It can happen in different ways. It can actually happen after many dates. What a cruel jerk. A recent pigging story brought the trend to light. She had a holiday romance with a guy and then they stayed in touch afterward. She saved up money to fly out to the Netherlands to meet up with him but then she got stood up at the airport! The jerk sent her a message saying that it had all been a joke-and she was clearly the punchline.
The cleaning agent then had to be subjected to effluent treatment or solvent recovery. If a product was used to clear the line, it was necessary to downgrade or dump the contaminated portion of the product.
Pigging systems are designed so that the pig is loaded into the launcher, which is pressured to launch the pig into the pipeline through a kicker line.
In some cases, the pig is removed from the pipeline via the receiver at the end of each run. Many systems are designed to pig the pipeline in either direction.
The pig is pushed either with a gas or a liquid; if pushed by gas, some systems  can be adapted in the gas inlet in order to ensure pig's constant speed, whatever the flow pressure is. The pigs must be removed, as many pigs are rented, pigs wear and must be replaced, and cleaning and other pigs push contaminants from the pipeline such as wax, foreign objects, hydrates, etc.
There are inherent risks in opening the barrel to atmospheric pressure so care must be taken to ensure that the barrel is depressurized prior to opening. If the barrel is not completely depressurized, the pig can be ejected from the barrel and operators have been severely injured when standing in front of an open pig door.
A pig was once accidentally shot out of the end of a pipeline without a proper pig receiver and went through the side of a house feet away. Operators should wear a self-contained breathing apparatus when working on sour systems.
A few pigging systems utilize a "captive pig", and the pipeline is only opened occasionally to check the condition of the pig. These systems are not common.
When you damage or destroy inventory or equipment at your workplace due to boredom, aggrevation, poor morale, or just because you want to break something. It can even be turned into a game where you see who can rack up the highest dollar amount of things destroyed. It can be especially satisifing when you cause damage to the building that the boss has to look at every . Oct 19, Subject: "Pigging" in dating - real? Anonymous They'll have a current photo, but they'll hold the camera in a way that slims them (a photo from high above looking down is an immediate indication of someone hiding their weight) or otherwise obscures the fact that they're carrying extra pounds beyond what they claim. Oct 12, There's a new dating trend that is being talked about in the online space. It's called 'pigging'. Imagine a situation where you have been exchanging amorous online messages with a man you have met in the cyberspace. You might have even met him in person once or twice. He might be living in another susanneill.com: Hemchhaya De.
There are many reports of incidents in which operators have been injured or even killed while performing a pigging operation. Common causes of such events are:. All these causes are directly related to improper operation of the process valves and the closure door. A common method of avoiding these kinds of incidents is to add valve interlocks,  which has been adopted by all global oil and gas operating companies.
Safety during pigging relies on strict adherence to safety procedures, which give detailed description of a safe valve operating sequence. By physically blocking incorrect operations, valve interlocks enforce such sequences. Valve interlocks are permanently mounted to both manual and motor operated valves and the closure door. The interlocks block operation of a valve or door, unless the appropriate keys are inserted.
Pipeline Pigging Products
The principle of valve interlocking is the transfer of keys. Each lock is equipped with two keys: a key for the locked open position and one for the locked closed position. During an operating procedure, only one key at a time is free. This key only fits in the interlock belonging to the valve that is to be operated next in the operating procedure.
All keys are uniquely coded to avoid the possibility that valves can be unlocked at an inappropriate time. Nowadays intelligent interlocking solutions enable the integration of field devices like pressure or H 2 S meters in a valve interlocking sequence.
A "pig" in the pipeline industry is a tool that is sent down a pipeline and propelled by the pressure of the product flow in the pipeline itself. There are four main uses for pigs:. One of the most common and versatile is the foam pig which is cut or poured out of open cell polyurethane foam into the shape of a bullet and is driven through pipelines for many reasons such as to prove the inner diameter of, clean, de-water, or dry out the line. There are several types of pigs for cleaning in various densities from 2 lb to 10 lb foam and in special applications up to 20 lb.
Some have tungsten studs or abrasive wire mesh on the outside to cut rustscaleor paraffin wax deposits off the inside of the pipe.
Other types are fully or criss-cross coated in urethane, or there are bare polyurethane foam pigs with a urethane coating just on the rear to seal and assist in driving the pig. There are also fully molded urethane pigs used for liquid removal or batching several different products in one line.
Inline inspection pigs use various methods for inspecting a pipeline. A sizing pig uses one or more notched round metal plates as gauges. The notches allow different parts of the plate to bend when a bore restriction is encountered. More complex systems exist for inspecting various cts of the pipeline. Intelligent pigs are used to inspect the pipeline with sensors and record the data for later analysis. These pigs use technologies such as magnetic flux leakage MFL and ultrasound to inspect the pipeline.
Intelligent pigs may also use calipers to measure the inside geometry of the pipeline. Inthe first intelligent pig was run by Shell Development. It demonstrated that a self-contained electronic instrument could traverse a pipeline while measuring and recording wall thickness. The instrument used electromagnetic fields to sense wall integrity.
In Tuboscope ran the first commercial instrument. It used MFL technology to inspect the bottom portion of the pipeline. The system used a black box similar to those used on aircraft to record the information; it was basically a highly customized analog tape recorder. Until recently, tape recording although digital was still the preferred recording medium.
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As the capacity and reliability of solid-state memory improved, most recording media moved away from tape to solid-state. Capacitive sensor probes are used to detect defects in polyethylene pipe gas pipeline. These probes are attached to the pig before it is sent through the polyethylene pipe to detect any defects in the outside of the pipe wall. This is done by using a triple plate capacitive sensor in which electrostatic waves are propagated outward through the pipe's wall.
Any change in dielectric material results in a change in capacitance. Modern intelligent or "smart" pigs are highly sophisticated instruments that include electronics and sensors that collect various forms of data during their trip through the pipeline. They vary in technology and complexity depending on the intended use and the manufacturer. The electronics are sealed to prevent leakage of the pipeline product into the electronics since products can range from being highly basic to highly acidic and can be of extremely high pressure and temperature.
Many pigs use specific materials according to the product in the pipeline. Power for the electronics is typically provided by onboard batteries which are also sealed.
Data recording may be by various means ranging from analog tape, digital tape, or solid-state memory in more modern units. The technology used varies by the service required and the design of the pig; each pigging service provider may have unique and proprietary technologies to accomplish the service.
Other "smart" pigs use electromagnetic acoustic transducers to detect pipe defects. Some smart pigs use a combination of technologies, such as providing MFL and caliper functions in a single tool.
Trials of pigs using acoustic resonance technology have been reported. For example, steel pipelines effectively prevent any significant radio communications outside the pipe.
It is therefore necessary that the pig use internal means to record its own movement during the trip. This may be done by odometersgyroscope-assisted tilt sensors and other technologies.
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Location verification is often accomplished by surface instruments that record the pig's passage by either audible, magnetic, radio-transmission or other means. The sensors record when they detect the passage of the pig time-of-arrival ; this is then compared to the internal record for verification or adjustment.
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The pipeline pig is inserted into the pipe using a pig trap, which is typically oversized to accommodate the tight fitting pig. A similar pig trap or receiver is located at the end of the pipe to receive the pig once it has traveled the length of the pipeline. Apache pigPro signalers are a reliable indicator that the pig has passed a certain point on the pipeline. We can help!