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  Rosie Roza created a new knowledge: Standard diving dress (en)

  Standard diving dress (en)

  Standard diving dress (also known as hard-hat or copper hat equipment, or heavy gear) is a type of diving suit that was formerly used for all underwater work that required more than breath-hold duration, which included marine salvage, civil engineering, p...  moreStandard diving dress (also known as hard-hat or copper hat equipment, or heavy gear) is a type of diving suit that was formerly used for all underwater work that required more than breath-hold duration, which included marine salvage, civil engineering, pearl shell diving and other commercial diving work, and similar naval diving applications. Standard diving dress has largely been superseded by lighter and more comfortable equipment.
  Standard diving dress consists of a diving helmet made from copper and brass or bronze, an air hose from a surface supplied diving pump, a waterproofed canvas suit, a diving knife, and weights to counteract buoyancy, generally on the chest, back and shoes. Later models were equipped with a diver's telephone for voice communications with the surface.
  Some variants used rebreather systems to extend the use of gas supplies carried by the diver, and were effectively self-contained underwater breathing apparatus, and others were suitable for use with helium based breathing gases for deeper work. Divers could be deployed directly by lowering or raising them using the lifeline, or could be transported on a diving stage. Most diving work using standard dress was done heavy, with the diver sufficiently negatively buoyant to walk on the bottom.
  Standard diving dress is also sometimes known in the US as a Diver Dan outfit from the television show of the same name....    less

  • 1 hour ago

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  Rosie Roza created a new knowledge: Scuba set (en)

  Scuba set (en)

  A scuba set is any breathing apparatus that is carried entirely by an underwater diver and provides the diver with breathing gas at the ambient pressure. Scuba is an anacronym for self-contained underwater breathing apparatus. Although strictly speaking t...  moreA scuba set is any breathing apparatus that is carried entirely by an underwater diver and provides the diver with breathing gas at the ambient pressure. Scuba is an anacronym for self-contained underwater breathing apparatus. Although strictly speaking the scuba set is only the diving equipment which is required for providing breathing gas to the diver, general usage includes the harness by which it is carried, and those accessories which are integral parts of the harness and breathing apparatus assembly, such as a jacket or wing style buoyancy compensator and instruments mounted in a combined housing with the pressure gauge, and in the looser sense it has been used to refer to any diving equipment used by the scuba diver, though this would more commonly and accurately be termed scuba equipment or scuba gear. Scuba is overwhelmingly the most common underwater breathing system used by recreational divers and is also used in professional diving when it provides advantages, usually of mobility and range, over surface supplied diving systems, and is allowed by the relevant code of practice.
  Two basic functional systems of scuba are in general use: open-circuit-demand, and rebreather. In open-circuit demand scuba, the diver expels exhaled air to the environment, and requires each breath be delivered on demand by a diving regulator, which reduces the pressure from the storage cylinder. The breathing air is supplied through a demand valve when the diver reduces the pressure in the demand valve during inhalation
  In rebreather scuba, the system recycles the exhaled gas, removes carbon dioxide, and compensates for the used oxygen before the diver is supplied with gas from the breathing circuit. The amount of gas lost from the circuit during each breathing cycle depends on the design of the rebreather and depth change during the breathing cycle. Gas in the breathing circuit is at ambient pressure, and stored gas is provided through regulators or injectors, depending on design.
  Within these systems, various mounting configurations may be used to carry the scuba set, depending on application and preference. These include back mount, which is generally used for recreational scuba and for bailout sets for surface supplied diving, side-mount, which is popular for tight cave penetrations, sling mount, used for stage-drop sets, decompression gas and bailout sets where the main gas supply is back mounted, and various non-standard carry systems for special circumstances.
  The most immediate risk associated with scuba diving is drowning due to a failure of the breathing gas supply. This may be managed by diligent monitoring of remaining gas, adequate planning and provision of an emergency gas supply carried by the diver in a bailout cylinder or supplied by the diver's buddy....    less

  • 1 hour ago

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  Rosie Roza created a new knowledge: Diving suit (en)

  Diving suit (en)

  A diving suit is a garment or device designed to protect a diver from the underwater environment. A diving suit may also incorporate a breathing gas supply (i.e. Standard diving dress or atmospheric diving suit). but in most cases applies only to the envi...  moreA diving suit is a garment or device designed to protect a diver from the underwater environment. A diving suit may also incorporate a breathing gas supply (i.e. Standard diving dress or atmospheric diving suit). but in most cases applies only to the environmental protective covering worn by the diver. The breathing gas supply is usually referred to separately. There is no generic term for the combination of suit and breathing apparatus alone. It is generally referred to as diving equipment or dive gear along with any other equipment necessary for the dive.
  Diving suits can be divided into two classes: "soft" or ambient pressure diving suits - examples are wetsuits, dry suits, semi-dry suits and dive skins, and "hard" or atmospheric pressure diving suits - armored suits that keep the diver at atmospheric pressure at any depth within the operating range of the suit....    less

  • 1 hour ago

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  Rosie Roza created a new knowledge: Underwater diving (en)

  Underwater diving (en)

  Underwater diving, as a human activity, is the practice of descending below the water's surface to interact with the environment.
  Immersion in water and exposure to high ambient pressure have physiological effects that limit the depths and duration possib...  moreUnderwater diving, as a human activity, is the practice of descending below the water's surface to interact with the environment.
  Immersion in water and exposure to high ambient pressure have physiological effects that limit the depths and duration possible in ambient pressure diving. Humans are not physiologically and anatomically well adapted to the environmental conditions of diving, and various equipment has been developed to extend the depth and duration of human dives, and allow different types of work to be done.
  In ambient pressure diving, the diver is directly exposed to the pressure of the surrounding water. The ambient pressure diver may dive on breath-hold, or use breathing apparatus for scuba diving or surface-supplied diving, and the saturation diving technique reduces the risk of decompression sickness (DCS) after long-duration deep dives. Atmospheric diving suits (ADS) may be used to isolate the diver from high ambient pressure. Crewed submersibles can extend depth range, and remotely controlled or robotic machines can reduce risk to humans.
  The environment exposes the diver to a wide range of hazards, and though the risks are largely controlled by appropriate diving skills, training, types of equipment and breathing gases used depending on the mode, depth and purpose of diving, it remains a relatively dangerous activity.
  Diving activities are restricted to maximum depths of about 40 metres (130 ft) for recreational scuba diving, 530 metres (1,740 ft) for commercial saturation diving, and 610 metres (2,000 ft) wearing atmospheric suits. Diving is also restricted to conditions which are not excessively hazardous, though the level of risk acceptable can vary.
  Recreational diving (sometimes called sport diving or subaquatics) is a popular leisure activity. Technical diving is a form of recreational diving under especially challenging conditions. Professional diving (commercial diving, diving for research purposes, or for financial gain) involves working underwater. Public safety diving is the underwater work done by law enforcement, fire rescue, and underwater search and recovery dive teams. Military diving includes combat diving, clearance diving and ships husbandry.
  Deep sea diving is underwater diving, usually with surface-supplied equipment, and often refers to the use of standard diving dress with the traditional copper helmet. Hard hat diving is any form of diving with a helmet, including the standard copper helmet, and other forms of free-flow and lightweight demand helmets.
  The history of breath-hold diving goes back at least to classical times, and there is evidence of prehistoric hunting and gathering of seafoods that may have involved underwater swimming. Technical advances allowing the provision of breathing gas to a diver underwater at ambient pressure are recent, and self-contained breathing systems developed at an accelerated rate following the Second World War....    less

  • 1 hour ago

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  Rosie Roza created a new knowledge: Diving helmet (en)

  Diving helmet (en)

  A Diving helmet is a rigid head enclosure with a breathing gas supply used in underwater diving. They are worn mainly by professional divers engaged in surface-supplied diving, though some models can be used with scuba equipment. The upper part of the hel...  moreA Diving helmet is a rigid head enclosure with a breathing gas supply used in underwater diving. They are worn mainly by professional divers engaged in surface-supplied diving, though some models can be used with scuba equipment. The upper part of the helmet, known colloquially as the hat or bonnet, may be secured to the diver or diving suit by a lower part, known as a neck dam or corselet, depending on the construction.
  The helmet seals the whole of the diver's head from the water, allows the diver to see clearly underwater, provides the diver with breathing gas, protects the diver's head when doing heavy or dangerous work, and usually provides voice communications with the surface (and possibly other divers). If a helmeted diver becomes unconscious but is still breathing, the helmet will remain in place and continue to deliver breathing gas until the diver can be rescued. In contrast, the scuba regulator typically used by recreational divers must be held in the mouth, otherwise it can fall out of an unconscious diver's mouth and result in drowning (this does not apply to a full face mask which also continues to serve air if the diver is unconscious).
  Before the invention of the demand regulator, all diving helmets used a free-flow design. Gas was delivered at a constant rate, regardless of the diver's breathing, and flowed out through an exhaust valve. Most modern helmets incorporate a demand valve so the helmet only delivers breathing gas when the diver inhales. Free-flow helmets use much larger quantities of gas than demand helmets, which can cause logistical difficulties and is very expensive when special breathing gases (such as heliox) are used. They also produce a constant noise inside the helmet, which can cause communication difficulties. Free-flow helmets are still preferred for hazardous materials diving, because their positive-pressure nature can prevent the ingress of hazardous material in case the integrity of the suit or helmet is compromised. They also remain relatively common in shallow-water air diving, where gas consumption is of little concern, and in nuclear diving because they must be disposed of after some period of use due to irradiation; free-flow helmets are significantly less expensive to purchase and maintain than demand types.
  Most modern helmet designs are sealed at the neck using a neoprene "neck dam" which is independent of the suit, allowing the diver his choice of suits depending on the dive conditions. When a neck dam is installed into a drysuit, however, the entire body is isolated from the surrounding liquid, giving an additional degree of warmth and protection. When divers must work in hazardous environments such as sewage or dangerous chemicals, a helmet (usually of the free-flow type or using a series exhaust valve system) is sealed to a special drysuit (commonly made of a fabric with a smooth vulcanised rubber outer surface) to completely isolate and protect the diver. This equipment is the modern equivalent of the historic Mark V "Standard Diving Dress"....    less

  • 1 hour ago

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  Franz Wegerer uploaded a new part RS-C-025-320 @ PARTcloud.net

  

  RS-C-025-320

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  Matthias Eckerlin uploaded a new part Flanschadapter Milchgewinde DN 50 @ PARTcloud.net

  

  Flanschadapter Milchgewinde DN 50

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  Josip Jakubiv uploaded a new part Diving Helmet @ PARTcloud.net

  

  Diving Helmet

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  Drazen Vorih
  

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  steel pipes hot/cold rolled galvanized steel
  
  
  We, Hebei Borun Steel Trade Co., Ltd are an international manufacturer of Tubular pipe for Oilfield and Energy Production. We offer pipe for Petrochemical industry, chemical industry, power industry, agricultural irriga...  morehot/cold rolled galvanized steel
  
  
  We, Hebei Borun Steel Trade Co., Ltd are an international manufacturer of Tubular pipe for Oilfield and Energy Production. We offer pipe for Petrochemical industry, chemical industry, power industry, agricultural irrigation and urban construction, and even pipeline transmission
  We specialize in large wholesale orders to large companies and distributers.
  Please send a message with what you need for a very competitive quote. Larger orders can receive discounted price.
  We can offer one of the widest variety of grades on BS1387, ASTMA53/A106/500,API 5L,GOST8731/8732, G3457,EN10255/10219, GB/T13912, EN39, EN ISO 1461, DIN2391, IS2062, AS/NZ 4680 steel products in the industry.
  Galvanized steel pipe
  -OD: 1/2-24″( 21.3mm-610mm)
  -W.T: SCH10, SCH30, SCH40, STD, XS, SCH80, SCH160, XXS etc.
  -the galvanized steel pipeline zinc finish:
  Pre-galvanized: Z80-120g/ m2;
  Hot dip galvanized: Z230-500g/ m2.
  -Steel grade:A106, A53, A179, A192, Q195/Q215/Q235/Q345, ST37/44/52, S355, S235, S275 and so on
  Pipe Section form: Round/Square/Rectangular/ oval
  Ends: thread( screw) with coupling; plain; beveled
  Application: 1. For reduced pressure liquid shipment such as water, gas and oil 2. For building and construction, e.g building greenhouse
  
  We can also customize your order with any coating and threading you need.
  
  
  Contact Info
  Email:octgpipes@126.com Whatsapp/Skype:+86 18233500310
  Linkedin:Tina Lee  less

  

  • 7 hours ago
• 
  steel pipes welded GR B api 5l lsaw steel pipe
  
  
  LSAW steel pipe...  morewelded GR B api 5l lsaw steel pipe
  
  
  LSAW steel pipe
  Production Process: JCOE
  Product Details:
  Out Diameter: 325-1420mm (14″ -60″)
  Wall Thickness: 8-40mm
  Length: 3-13m
  Standards: API 5L, ASTM A672, ASTM A53, SY/T5768 -2006, GB/T3091 -2008, GB/T9711 -1
  Steel Grades: Q235, Q345, L245, L290, A53, S235, S275, S355, GR.B/X42/X46/X56, A672 B60 CL22
  Packing: in bulk due to big sizes
  Surface Treatment: anti-rust black painting, anti-corrosion treatment (FBE, 3PE, 2PE)
  TPI ( Third Party Inspection): SGS, BV, MOODY, CCIC
  Applications: liquid shipping like oil, water and fuel, building and constructions, chemical vegetation, power station, as well as foreign drill system.
  
  
  If you consider the LSAW pipe of our business piping project, please call and quote. Hebei Borun Steel Trade Co., Ltd is a famous steel pipe supplier in China. We can provide the items you need. The timely delivery orders are all over the world.
  
  
  Contact Info
  Email:octgpipes@126.com Whatsapp/Skype:+86 18233500310
  Linkedin:Tina Lee  less

  

  • 7 hours ago
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  steel pipes 5. Casing Coupling:
  Hebei Borun Steel Trade Co.,Ltd is a manufacturer and exporter with 15 years' experiences.We mainly exports Carbon Steel(Seamless steel pipe,OCTG and so on).If you're interested,pls contact me.
  
  Technical standard...  more5. Casing Coupling:
  Hebei Borun Steel Trade Co.,Ltd is a manufacturer and exporter with 15 years' experiences.We mainly exports Carbon Steel(Seamless steel pipe,OCTG and so on).If you're interested,pls contact me.
  
  Technical standard
  API SPEC 5CT、API SPEC 5B
  Product grade
  H40、J55、K55、N80-1、N80Q、L80、C95、T95、P110
  Specification range
  OD127~365.12mm（4 1/2"~13 3/8"）
  Thread types
  Short round thread(STC)、Long round thread(LC)、Buttress thread(BC)
  Application of product
  Internally threaded cylinder for joining two lengths of threaded casing pipe
  Contact Info
  Email:octgpipes@126.com Whatsapp/Skype:+86 18233500310
  Linkedin:Tina Lee  less

  

  • 7 hours ago