316 Orifice Plate An orifice plate is a device used for measuring flow rate, for reducing pressure or for restricting flow (in the latter two cases it is often called a restriction plate). Either a volumetric or mass flow rate may be determined, depending on the calculation associated with the orifice plate. It uses the same principle as a Venturi nozzle, namely Bernoulli's principle which states that there is a relationship between the pressure of the fluid and the velocity of the fluid. When the velocity increases, the pressure decreases and vice versa.
An 316 orifice Plate is a thin plate with a hole in it, which is usually placed in a pipe. When a fluid (whether liquid or gaseous) passes through the orifice, its pressure builds up slightly upstream of the orifice but as the fluid is forced to converge to pass through the hole, the velocity increases and the fluid pressure decreases. A little downstream of the orifice the flow reaches its point of maximum convergence, the vena contracta where the velocity reaches its maximum and the pressure reaches its minimum. Beyond that, the flow expands, the velocity falls and the pressure increases. By measuring the difference in fluid pressure across tappings upstream and downstream of the plate, the flow rate can be obtained from Bernoulli's equation using coefficients established from extensive research.
ASTM A240 Grade 304 Stainless Steel s the standard molybdenum-bearing grade, second in importance to 304 amongst the austenitic stainless steels. The molybdenum gives 316 better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments. It has excellent forming and welding characteristics. It is readily brake or roll formed into a variety of parts for applications in the industrial, architectural, and transportation fields. Grade 316 also has outstanding welding characteristics. Post-weld annealing is not required when welding thin sections.
ASTM A240 Grade 316L, the low carbon version of 316 and is immune from sensitisation (grain boundary carbide precipitation). Thus it is extensively used in heavy gauge welded components (over about 6mm). Grade 316H, with its higher carbon content has application at elevated temperatures, as does stabilised grade 316Ti.
The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures ASTM A240 Grade 316 It is the preferred steel for use in marine environments because of its greater resistance to pitting corrosion than other grades of steel. The fact that it is negligibly responsive to magnetic fields means that it can be used in applications where a non-magnetic metal is required. In addition to molybdenum, 316 also contains a number of other elements in varying concentrations. Like other grades of stainless steel, marine grade stainless steel is a relatively poor conductor of both heat and of electricity when compared to metals and other conductive materials.
|316 Orifice Plate Specification||ASTM A240 / ASME SA240, ASTM A516 Grade 70 / ASME SA516 Grade 70, ASTM A36 / ASME SA36, IS: 2062|
|316 Orifice Plate Manufacturing Process||CNC Cutting / Machining / Forging|
|316 Orifice Plate Other Grades||ASTM A240 Grade 304, ASTM A240 Grade 304L, ASTM A240 Grade 3304/304L, ASTM A240 Grade 310s, ASTM A240 Grade 316, ASTM A240 Grade 316L, ASTM A240 Grade 316/316L, ASTM A240 Grade 321, ASTM A240 Grade 347, ASTM A240 Grade 904L, ASTM A240 UNS S31803 Duplex, Inconel 600, 625, Monel 800, Incoloy 800, 825, ASTM A516 Grade 70, ASTM A36, IS2062 E250, IS2062 E350 etc.|
|316 Orifice Plate Outer Diameter||1/2" NB TO 24" NB|
|316 Orifice Plate Pressure Class||Class 150#, Class 300#, Class 400#, Class 600#, Class 900#, Class 1500#, Class 2500# or As Per Custom Requirement
PN 6, PN 10, PN 16, PN 25 and PN 40 etc
|316 Orifice Plate Facing Bore||Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ), Concentric, Bevel|
|316 Orifice Plate Dimension||ASME B16.5, ASME B16.48, ISA RP 3.2 , DIN 1952 , BS 1042, ISO-5167, AGA 3, API 14.3, ASME B16.47 SERIES A, ASME B16.47 SERIES B, ASME B16.36, BS10, EN1092-1:2013, MSS SP44, ASA, API-605, ISO 7005, ISO 15590-3, DIN 2631-2638, DIN 2573-2576, DIN 2527, DIN 2641-2642, DIN 2565-2566, DIN2502, AWWA, ASTM, AS2129 TABLE C, D, E, F, J etc..|
|316 Orifice Plate Edges Types||Square Edge and Bevel Edge|
|316 Orifice Plate Types||Restriction Orifice Plate, Paddle Type Orifice Plate, Paddle Blank and Spacer, Ring Type Integral Orifice Plate, Concentric Bore Orifice Plate, Eccentric Bore Orifice Plate, Segmental Orifice Plate, Quadrant Orifice Plate etc.|
|316 Orifice Plate Other Testing||NACE MR0175, Ultrasoung TEST, IGC TEST, Intergranular Corrrosion Test as per ASTM A262 Practice E, Charpy Impact Test, Macro, Grain Size, Hardness, Magnetic Particle, PMI etc.|
|316 Orifice Plate Value Added Services||As per Custom Drawing, Supplied Bolts, Studs, Gasket and Flanges.|
|316 Orifice Plate Packaging||Carrate / Wooden Pallet / Wooden Box|
|316 Orifice Plate Shipment & Transportation||By Road - Truck / Train Partial Load, Full Load, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / 45 Feet Container / High Cube Container / Open Top Container, By Air - Freighter Civil Passenger and Cargo Planes|
|316 Orifice Plate Material Test Certificate||Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS, Bureau of Indian Standards BIS Approved ETC|
The chemical composition of grade 316 Orifice Plate is outlined in the following table
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