|• Bubble zero leakage • Renewable seal • Resist chloride ion • Extremely long usage •|
|Bubble zero leakage||Disc seal ring was achieved by torque force evenly loaded on disc soft seal edge which has function to assure zero leakage in both hydrostatic or air test per API 598.|
|Renewable seal:||Sealing ring can be respectively maintained and replaced after accidental damageThis replaceable Seal ring allows for a dependable tight seal and a longer service life.|
|Resist chloride ion:||For the marine environment the valve material chosen by Tiangong is resistant to chloride ion corrosion|
|Extremely long usage:||
The principle of operation incorporated in the Tiangong triple offset valve is geometry in motion. Both the seat in the body and the seal on the disc are surfaces of a cone which is sectioned at an angle. The valve shaft is located slightly to one side of the seat center and above the plane of the seat. Its center of rotation is also somewhat offset from the axis of the imaginary cone which extends from the surface of the seat.
When the valve is closed the surface of the seal and the seat are in full contact at all points. Any effort to try to further close the disc (rotating it into the seat) increases the sealing force and tightens the valve. This allows the valve to achieve a bi-directional seal.
Opening the valve (rotating the disc away from its seat) results in the seal moving away from the seat at all points eliminating galling and minimizing seat/seal wear. Tiangong valves feature true non-rubbing seating surfaces for long life and tight shutoff.
Offshore oil facilities come to the forefront of our thinking these days only when a catastrophic accident occurs aboard a platform or other facility. That's because they are generally out to sea and out of sight. It's difficult to comprehend the varied and complex piping systems that allow a rig or a drill ship to operate successfully and safely but they're an integral part of what's happening every day. These piping systems contain a multitude of valves built to multiple specifications to handle a variety of flow control challenges. They also control various system loops and contain pressure relief devices.
The arterial heart for oil production is the oil or gas recovery piping system. Although not always on the platform many production systems also use"Christmas trees" and piping systems that operate in inhospitable depths of 10000 feet or more. This production equipment is built to a myriad of exacting American Petroleum Institute (API) standards and are referenced in several API Recommended Practices.
The drill platform or drill ship contains all of the normal trappings of an onshore oil well drilling and gathering system. However the components including the valves also must have the capability to withstand the harsh corrosive salt air and water environment in which they operate. Besides having this capability weight and size are often key valve selection criteria depending on the application.
The crude or natural gas piping systems found on production platforms and ships are considered part of the "upstream" and "midstream" categories of the industry. [To review: Upstream is all the equipment (piping and valve-wise) from down in the drill hole to the choke on the wellhead. The choke is a regulating valve and usually the last flow control element on the Christmas tree). Midstream is everything from the choke to the refinery fence while downstream is everything inside the fence and throughout the refinery.
All of the wellhead valve designs are covered in upstream documents such as API 6A Petroleum and Natural Gas Industries–Drilling and Production Equipment–Wellhead and Christmas Tree Equipment. On most large platforms additional processes are applied to the raw fluid coming from the wellhead. These include separating water from the hydrocarbons and separating gas and natural gas liquids from the fluid stream. These post-Christmas-tree piping systems are generally built to ASME B31.3 piping codes with the valves designed in accordance with API valve specifications such as API 594 API 600 API 602 API 608 and API 609. Some of these systems may also contain API 6D gate ball and check valves. Since any pipeline on the platform or drill ship is internal to the facility the strict requirements in API 6D valves for pipelines do not need to be followed.
Although multiple valve types are used in these piping systems the type most frequently chosen is the ball valve. The lightweight and relatively small footprint of this type of valve for isolation service helps greatly in the space-starved confines compared to a type such as gate valves. Ball valves also help with the weight-conscious environs of the offshore structure. An important consideration in these cases is on-site repairability because the facilities are separated from on-shore repair shops by many miles of water.
UTILITY PIPING SYSTEMS
Offshore platforms and ships have an infrastructural piping system just like large onshore plants. These systems are critical to the day-to-day operation of the facility as well as its safety. The valves in these systems usually do not fall under API pipelineproduction or process valve standards. In United States waters they are covered by U. S. coast Guard(USCG) or American Bureau of Shipping (ABS) regulations. These piping systems include any type of ballast-controlling piping especially where there are direct outlets to the sea.
Fire protection piping systems are also critical in this case and they are specialized for the offshore environment. The firefighting system on an offshore platform begins with a series of high-pressure pumps drawing seawater to fight a potential fire. The pumps spread water throughout the vessel or structure through a lattice of pipes and deluge nozzles.Popular materials for these systems are copper/nickel alloy.
While weight is an important consideration on any floating offshore facility linear valves such as gates and globes are still used in many of these utility applications. Since space is also often at a premium on drill ships and FPSOs the non-rising stem design is often employed for gate valves.
Types of Offshore Facilities
Many types of offshore oil and gas production structures exist. The choice of which the production company uses is ba
Fixed Platform—The fixed platform is a solid design with fixed length or limited adjustment height control. The fixed structure is limited in depth of water (DOW) to what can be built in the shipyard and transported to the proposed drill site via ship or barge. Fixed platforms are not nearly as popular as they once were because of the facility's one-use status (lack of mobility) and the expense of decommissioning the structure should it need to be abandoned.
Jackup—Jackups are the most common type of offshore drilling rig. They are usually comprised of a floating barge and a main drilling structure with legs that are jacked down to the ocean floorcausing the drilling structure to rise above the waves. Because they make solid contact with the bottom their useable DOW is limited.
Semisubmersible—The operating deck of a semisubmersible sits high above the waves on submerged pontoons. The drill structure is held in position by a system of anchors. These anchors are sometimes augmented by powered systems to help maintain position over the drill target. Semisubmersibles are used around the world in water depths up to 10000 feet.
Drill Ship—Drill ships are basically oil rigs supporting equipment built into a ship. The drill ships are self-powered and completely independent. Like the semisubmersibles drill ships are used in water depths of up to about 10000 feet. They are able to stay in position through use of sophisticated GPS systems. Because they are mobile they can move out of harm's way to avoid severe weather events or relocate to a new field when required.
FPSO—FPSOs handle many of the operations contained on a drilling platform except for the drilling. These activities include oil gas and water separation and preparing gas and water for injection.The FPSO also adds storage of about 500000 barrels of oil. This on-site storage capability negates the need for long offshore product pipelines because the oil in the FPSO is offloaded into transit tankers as needed.
FLNG—An FLNG ship contains all of the necessary processing equipment to convert natural gas to liquid natural gas (LNG) and then offload the LNG to LNG tankers. The on-site capability eliminates the need for expensive undersea natural gas pipelines that would be laid from the well to the onshore liquefaction plant.
|Valve Design:||API 609|
|Face to face:||ISO 5752-20 / ISO 5752-13 / DIN F4|
|Connection:||ASME B16.5 / ASME B16.47|
|Manufacturing Quality:||ISO 9001 / ISO 15848|
|Body:||Stainless Steel(A995 4AA995 5AA995 6A) Aluminum Bronze(B505 C95400B505 C95500B505 C95800BS1400-AB2C)|
|Disc:||Stainless Steel(A995 4AA995 5AA995 6A) Aluminum Bronze(B505 C95400B505 C95500B505 C95800BS1400-AB2C)|
|Stem:||A182 F53 / K500 / C6300|
|Body seat:||Body is seat|
|Offshore Platforms Triple Offset Butterfly Valve Series 3310 Drawing||Drawing|
|Offshore Platforms Triple Offset Butterfly Valve Series 3310 Catalogue|
|Offshore Platforms Triple Offset Butterfly Valve Series 3310 Brochure|
|Triple Offset Butterfly Valve Series 3000 IOM|