What is an orifice flange?
Orifice flanges are used with orifice meters for the purpose of measuring the flow rate of either liquids or gases in the respective pipeline.There are three types orifice flanges according to their connecting type:welding neck orifice flange,slip on orifice flange and threaded orifice flange.The traditional orifice flange assembly consists of a pair of flanges, orifice plate, bolts, nuts, gaskets, jacking screws and plugs. Jacking screws ensure the easy removal of the primary flow element.
Orifice Flange Technical Parameters
| Steel Flanges | ||
| Material | Carbon steel | ASTM A105. ASTM A350 LF1. LF2, CL1/CL2, A234, S235JRG2, P245GH |
| P250GH, P280GHM 16MN, 20MN ,20# | ||
| Stainless steel | ASTM A182, F304/304L, F316/316L | |
| Alloy steel | ASTM A182 A182 F12,F11,F22,F5,F9,F91etc. | |
| Standard | ANSI | Class 150 Flanges-Class 2500 Flanges |
| DIN | 6Bar 10Bar 16Bar 25Bar 40Bar | |
| JIS | 5K Flanges-20K Flanges | |
| UNI | 6Bar 10Bar 16Bar 25Bar 40Bar | |
| EN | 6Bar 10Bar 16Bar 25Bar 40Bar | |
| TYPE | 1.Welding neck Flange 2.Slip on | |
| 3.Blind flange 4.Long welding neck flange | ||
| 5.Lap joint flange 6.Socket welding | ||
| 7.Threaded flange 8.Orifice Flange | ||
| Surface | Anti-rust oil, clear lacquer, Black lacquer, Yellow lacquer,hot-dipped Galvanized,electrical galvanized | |
| Connection | Welding, Threaded | |
| Technical | Forged, Casting | |
| Size | DN10-DN3600 | |
| Package | 1.>Standard export packaging (Plywood Case Of Outside,Plastic Cloth Of Inside). 2:As Customers' Requirements |
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| Heat Treatment | Normalizing, Annealing, Quenching+Tempering | |
| Certificate | TUV,ISO9001:2008;PED97/23/EC,ISO14001:2004,OHSAS18001:2007 | |
| Applications | Water works, Shipbuilding industry, Petrochemical & Gas industry, Power industry, Valve industry and general pipes connecting projects etc. |
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Shengtian Group can provide a variety orifice flange,as follows:
ANSI/ASME B16.36 class 300 welding neck RF orifice flange
ANSI/ASME B16.36 class 300 welding neck RTJ orifice flange
ANSI/ASME B16.36 class 300 slip on orifice flange
ANSI/ASME B16.36 class 300 threaded orifice flange
ANSI/ASME B16.36 class 400 welding neck RF orifice flange
ANSI/ASME B16.36 class 400 welding neck RTJ orifice flange
ANSI/ASME B16.36 class 600 welding neck RF orifice flange
ANSI/ASME B16.36 class 600 welding neck RTJ orifice flange
ANSI/ASME B16.36 class 900 welding neck RF orifice flange
ANSI/ASME B16.36 class 900 welding neck RTJ orifice flange
ANSI/ASME B16.36 class 1500 welding neck RF orifice flange
ANSI/ASME B16.36 class 1500 welding neck RTJ orifice flange
ANSI/ASME B16.36 class 2500 welding neck RF orifice flange
ANSI/ASME B16.36 class 2500 welding neck RTJ orifice flange
Raw material procurement process:
1. Spectral analysis: Detect the chemical composition of raw materials to ensure they meet the specified requirements.
2. Metallographic structure testing: Analyze the metallographic structure of raw materials to determine whether the microstructure of the material is normal.
3. Hardness testing: Detect the hardness of raw materials and preliminarily evaluate the properties of the materials.
Forging ring grinding process:
4. Surface inspection - paint thickness detection: inspect the surface of the forging after forging to see if there are cracks, folds, inclusions and other defects, and at the same time check the thickness of the paint.
5. Dimensional accuracy testing: Measure the geometric size and shape of the forging to ensure compliance with the design drawing requirements.
6. Magnetic particle inspection - MT or penetrant detection - PT: Used to detect defects on the surface and near surface of the forging, such as cracks, etc.
Heat treatment process:
7. Hardness testing: Detect the hardness after heat treatment to determine whether the heat treatment effect meets the requirements.
8. Metallographic Structure Testing: Observe the metallographic structure, understand the impact of heat treatment on the microstructure of the material, and evaluate the uniformity and integrity of the structure.
9. Mechanical properties - impact and tensile: Through impact and tensile tests, the mechanical properties of forgings, such as tensile strength, yield strength, impact toughness, etc. are determined.
Machining process:
10. Dimensional accuracy testing: Measure the processed dimensions again to ensure that the final product meets the accuracy requirements.
11. Surface quality inspection: check the roughness and flatness of the processed surface to ensure good surface quality.
Assembly process
12. Appearance inspection: Check the overall appearance after assembly to ensure that there are no bumps, scratches and other defects.
13. Dimensional and position accuracy detection: Detect the relevant dimensions and positional accuracy after assembly to ensure assembly quality.
Finished product inspection process:
14. Ultrasonic inspection - UT: Ultrasonic inspection of the finished product to check for internal defects.
15. Intergranular corrosion detection: For flange forgings used in specific corrosion environments, intergranular corrosion detection is conducted.
16. Handheld Spectral Inspection - PMI: Sampling the chemical composition of the finished product to prevent material confusion or composition deviation
