ASTM A694 is a standard specification developed by the American Society for Testing and Materials (ASTM) that covers carbon and Alloy Steels forgings for pipe flanges, fittings, valves, and other high-pressure transmission service Components. Specifically, ASTM A694 addresses flanges used in high-pressure and high-temperature applications in industries such as oil and gas, petrochemical, and power generation.
The ASTM A694 standard includes several grades of carbon and alloy steel that are suitable for various service conditions. These grades are categorized based on their mechanical properties and intended use. The material grades covered by ASTM A694 include F42, F46, F48, F50, F52, F56, F60, F65, and F70.
ASTM A694 Flanges is a method of connecting pipes, valves, pumps and other equipment to form a piping system. It also provides easy access for cleaning, inspection or modification. Flanges are usually Weld Neck Flange or screwed. Flanged joints are made by bolting together two flanges with a gasket between them to provide a seal.ASTM A694 Flanges Standard Specification for Carbon and Alloy Steel Forgings for Pipe Flanges, Fittings, Valves, and Parts for High-Pressure and Pressure Vessel Transmission Service. Several grades of material, based on minimum yield strength requirements, are covered Materials adhere to testing and tensile property requirements as well.
Overview of the commonly used ASTM A694 flange grades:
ASTM A694 flanges are widely used in pipeline systems, particularly in critical areas where high pressures, elevated temperatures, and corrosive environments are present. These flanges are manufactured by forging and are subjected to strict quality control measures to ensure their integrity and performance in challenging operating conditions.
Users and manufacturers refer to the ASTM A694 specification to ensure that the selected material and flange design meet the required standards for safety, reliability, and durability in various industrial settings. Additionally, ASTM A694 flanges may be subject to additional testing and inspection procedures as specified by the purchaser or relevant industry standards.
Savoy Piping Inc. are recognized as the prominent Manufacturer, Exporter and Supplier of a broad assortment of ASTM A694 F42 Flanges, ASTM A694 F46 Flanges, ASTM A694 F52 Flanges,ASTM A694 F56 Flanges, ASTM A694 F60 Flanges, ASTM A694 F65 Flanges,ASTM A694 F70 Flanges. The offeredASTM A694 Flanges is designed with utmost precision in conformity with the international quality standards.
ASTM A694 Flanges Specification | ASTM A694 / ASME SA694 |
ASTM A694 Flanges Manufacturing Process | Hot Forging / Rolling / Machining |
ASTM A694 Flanges Other Grades | ASTM A694 F42 / ASTM A694 F46 / ASTM A694 F52 / ASTM A694 F56 / ASTM A694 F60 / ASTM A694 F65 / ASTM A694 F70 / ASME SA694 F42 / ASME SA694 F46 / ASME SA694 F52 / ASME SA694 F56 / ASME SA694 F60 / ASME SA694 F65 / ASME SA694 F70 |
ASTM A694 Flanges Outer Diameter | 1/2" NB TO 64" NB |
ASTM A694 Flanges 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 |
ASTM A694 Flanges Schedule | Sch 10s TO Sch XXS or As Per Custom Requirement |
ASTM A694 Flanges Facing | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
ASTM A694 Flanges Dimension | ASME B16.5, 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, AS2129 TABLE C, D, E, F, J etc.. |
ASTM A694 Flanges Types | Welding Neck Flange, Slip On Flange, Socket Weld Flange, Lap Joint Flange, Threaded Flange, Blind Flange, Orifice Flanges, Plate Flange, Long Welding Neck Flanges, Weldoflange, Nipoflange, Expander Flange, Reducing Flange, WNRF Flange, SORF Flange, SWRF Flange, Custom Flange as per Drawing etc. |
ASTM A694 Flanges Other Testing | NACE MR0175, Ultrasounic Test, Charpy Impact Test, Macro, Grain Size, Hardness, HIC, SSC, Sour Service, A for annealed, N for normalized, NT for Normalized and Tempered, or QT for Quenched and Tempered, Carbon Equivalent etc. |
ASTM A694 Flanges Value Added Services | Rolling, Drill, Punch, CNC Machining, Sand Blasting, Shot Blasting, Heat Treatment, Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized |
ASTM A694 Flanges Packaging | Loose / Carrate / Wooden Pallet / Wooden Box / Plastic Cloth Wraps |
ASTM A694 Flanges 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 |
ASTM A694 Flanges 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 ASTM A694 Flanges is outlined in the following table
Chemical Composition of ASTM A694, Heat Analysis, % | |
---|---|
Carbon [C] | ≤0.30 |
Manganese [Mn] | ≤1.60 |
Phosphorus [P] | ≤0.025 |
Sulfur [S] | ≤0.025 |
Silicon [Si] | 0.15-0.35 |
*1. Alloying elements including Cu, Ni, Cr, Mo, V, Nb and B shall be reported if any.
*2. No limits apply to above-mentioned elements of A694 forgings furnished in carbon or low alloy steel.
*3. ASTM A694 forgings furnished in alloy steel and Stainless Steel should be in conformance to ASTM A707 Grade L5.
*4. When required, the carbon equivalent CE shall be calculated as per C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15.
The mechanical properties of grade A694 Flange are displayed in the following table.
ASTM A694 Grade | Yield Strength min. | Tensile Strength min. | Elongation min. | ||
MPa | ksi | MPa | ksi | % | |
A694 F42 FLANGES | 290 | 42 | 415 | 65 | 20 |
A694 F46 FLANGES | 315 | 46 | 415 | 60 | 20 |
A694 F48 FLANGES | 330 | 48 | 425 | 62 | 20 |
A694 F50 FLANGES | 345 | 50 | 440 | 64 | 20 |
A694 F52 FLANGES | 360 | 52 | 455 | 66 | 20 |
A694 F56 FLANGES | 385 | 56 | 470 | 68 | 20 |
A694 F60 FLANGES | 415 | 60 | 515 | 75 | 20 |
A694 F65 FLANGES | 450 | 65 | 530 | 77 | 20 |
A694 F70 FLANGES | 485 | 70 | 565 | 82 | 18 |
The ASTM A694 forgings can be furnished in Carbon Steel, low alloy steel Steel Pipe or alloy steel. The steel shall be made by either open hearth, electric furnace, or basic oxygen process and it shall be fully deoxidized. Its forged flanges and forged fittings can be readily manufactured from ingots, blooms, billets, slabs, or bars. However, A694 flanges shall not be machined directly from plate nor from solid bar stock since sufficient hot working(forging) is necessary to develop a wrought structure throughout the part.
All grades of ASTM A694 shall be heat treated. Heat treatment of carbon steel and high-strength low-alloy steel may consist of normalizing, normalizing-and-tempering, or quenching-and tempering. Heat treatment of alloy steel may consist of normalizing and precipitation heat treatment or quenching and precipitation heat treatment. The tempering temperature shall be at least 1000 °F [540 °C]. The precipitation heat treatment of the alloy steel shall be in the range from 1000 to 1225 °F [540 to 665 °C].
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