mollificio somi srl fasteners Germany mollificio somi srl model mollificio somi srl price

mollificio somi srl fastener gaskets are mechanical seals between two objects, typically used as spacers to prevent pressure and corrosion between the two objects. They are also used to distribute load on threaded fasteners and prevent leakage in pipelines due to natural thermal expansion and contraction. Belleville washers, wave washers, wear-resistant pads, preload indicators, locking devices. Since machined surfaces cannot be perfect, gaskets are used to fill irregularities. Materials include stainless steel and carbon steel; carbon steel is essentially iron. Gaskets are spiral-wound rings made of metal strips (usually v shaped metal strips) and non-metallic strips. The metal and non-metallic strips are wound alternately. Due to their good elasticity, they are widely used in flange sealing structures in the petrochemical, chemical, and power industries. Depending on the specific location, steel rings can be added to the inner or outer layer of the gasket for positioning or reinforcement.

mollificio somi srl fastener material

A gasket is a component placed between a connector and a nut, typically a flat metal ring. Gaskets are made of metallic materials or non-metallic materials such as rubber, synthetic resin, and polytetrafluoroethylene (PTFE). Non-metallic covered gaskets are gaskets with an outer layer of synthetic resin or similar material. Semi-metallic gaskets are made from both metallic and non-metallic materials, such as spiral wound gaskets and metal-jacketed gaskets. A spiral wound gasket consists of a metal strip with a shaped cross-section interleaved with a non-metallic strip, wound in a spiral. The inner ring is a metal ring installed on the inner circumference of the spiral wound gasket, and the outer ring is a metal ring installed on the outer circumference. Metal-jacketed gaskets are gaskets made of metals such as steel, aluminum, copper, nickel, or Monel alloy. The metal strip and non-metallic strip are wound alternately. Due to their good elasticity, they are used in flange sealing structures in industries such as oil and gas. Depending on the specific location, steel rings can be added to the inner or outer layer of the gasket for positioning or reinforcement.

mollificio somi srl fastener applicable environment

Carbon steel: Recommended maximum operating temperature not exceeding 538℃, especially when the medium is oxidizing. High-quality thin carbon steel plates are also unsuitable for equipment manufacturing involving inorganic acids, neutral or acidic salt solutions. If carbon steel is subjected to stress, the accident rate for equipment under hot water conditions is very high. Carbon steel gaskets are typically used for high-concentration acids and many alkaline solutions. Brinell hardness approximately 120. Adding about 2% molybdenum to 304 stainless steel improves its strength and corrosion resistance as temperature increases. It exhibits higher creep resistance than other common stainless steels at elevated temperatures. Recommended maximum operating temperature not exceeding 760℃. Brinell hardness approximately 160. Aluminum (content not less than 99%). Aluminum has excellent corrosion resistance and machinability, suitable for manufacturing double-jacketed gaskets. Brinell hardness approximately 35. Recommended maximum continuous operating temperature not exceeding 428℃

mollificio somi srl fastener installation requirements

The gasket and flange sealing surface must be cleaned thoroughly, with no scratches, spots, or other defects that could affect sealing performance. The gasket's outer diameter should be smaller than the flange sealing surface's outer diameter, and the gasket's inner diameter should be slightly larger than the pipeline's inner diameter. The difference between the two inner diameters is generally taken as 2 times the thickness of the sealing gasket to ensure that after tightening, the inner edge of the gasket does not extend into the vessel or pipeline, thereby avoiding obstruction of fluid flow. Gasket preload should not exceed design specifications to prevent excessive compression and loss of resilience. When installing gaskets, tighten the nuts sequentially. Do not reach the design value in a single pass. Generally, cycle at least 2 to 5 times to ensure uniform stress distribution on the gasket. When replacing gaskets on pressure vessels and pipelines containing flammable or explosive media, use safety tools to avoid sparks caused by tool contact with flanges or bolts, which could lead to fire or explosion accidents.

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