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Overview
The nozzle neck is welded to the flange with a butt weld joint. Slip On. This kind of flanges could be accepted only in low critical services (low pressure and temperature, and no special services). In this type, flange and nozzle neck are not welded with a butt-weld joint, but both fillet welds.
Nozzle piece is essential in the interconnection between pressure vessel, heat exchanger or reactor with the rest of process.
The Heavy Barrel Flanges,also called Heavy barrel nozzles which has additional reinforcement beyond the same size lighter wall standard LWN (Long weld neck flange). Common standard lengths are available from stock and can be increased to any longer length to provide the offset needed. These connections are always supplied with a “Nut Stop” unless “Nut Relief” is requested. The inside diameter of these connections for 12” and below are provided with a S80 pipe size bores, 14” and large HB Connections are offered with a bore equal to the nominal pipe size. Special bores, contoured bottoms and other custom variations of all kinds are available upon request.
Since pressure vessels are primarily used to separate liquids from the gases, the liquid outlet nozzle sizes are as crucial as the inlet and outlet nozzles. It helps to know that the size of the drain nozzle connection must be according to its service. A typical velocity of 3.0 m/s and an appropriate pressure drop can be used if the liquid is clean and contains minimal solids. Be sure to size the lines connecting to a pump suction accordingly.
Problems arise when you repurpose the pressure vessel from relatively clean service to a dirtier service such as an inlet separator to a plant. A Nominal Pipe Size of 2 inches is the preferable choice for inlet filter separator drain connections, and it should not be smaller than 1 ½ inch NPS.
Forged Vessel Connections type
Forged Vessel Connections Work Pressure Grade
Standards and Materials
F1,F2,F5,F21,F22 Cl.1,F22 Cl.2,F22V,F51,F53,F55,F92, F304,F404L,F304H,F310, F317,F321,F321H,F347,F347H | ASTM A182/A182M | Forged or rolled alloy and stainless steel pipe flanges |
UNS N04400/N08811 | ASTM B564/B564M | Hot rolled & cold finished steel age hardening stainless bars and shaping |
UNS N08800/N08810 | ||
UNS N08825/N010276 | ||
UNS N06625 |
A105/A105M | ASTM A105 | Carbon steel for piping components | |
A350LF2, A350LF3, A350LF6 | ASTM A350/A350M | Carbon and low alloy steel forgings | |
A266 Gr. 2, A266 Gr. 4 | ASTM A266/A266M | Carbon steel forgings for pressure vessel components | |
A694 F52, A694 F60, A694 F65,A694 F70 | ASTM A694/A694M | Carbon and alloy steel forgings for pipe, flanges, fittings valves and parts | |
A765 Gr. I,A765 Gr. II,A765 Gr. III,A765 Gr. IV | ASTM A765/A765M | Carbon and low-alloy steel forgings with mandatory toughness requirements | |
A508 Gr. 1, A508 Gr. 2,A508 Gr. 3,A508 Gr. 4N | ASTM A508/A508M | Quenched and tempered vacuum-treated carbon and alloy steels |
A336 F1,F5,F5A,F11,F22,F22V, F9,F91,F92 | ASTM A336/A336M | Alloy steel forgings for pressure and high temperature parts |
UNS N08904 | ASTM B625/B625M | Alloy steel forgings |
UNS N04400 | ASTM B564/B564M | Nikel-copper alloy |
Alloy special steels | 20MnMoNi4-5 | EN 10250-3 |
Stainless steels | X12Cr13, X3CrNiMo13-4 | EN 10250-4 |
Nickel steels | 12Ni14 (W.Nr. 1.5637), X12Ni5 (W.Nr. 1.5680) | EN 10222-3 |
Weldable fine grain steels | P285NH (W.Nr. 1.0477), P355NH (W.Nr. 1.0565) P420NH (W.Nr. 1.8932), P285QH (W.Nr. 1.0478) P355QH1 (W.Nr. 1.0571), P420QH (W.Nr. 1.8936) | EN 10222-4 |
Carbon steel forging | C22, 20Mn5, 20Mn5N, 20Mn5V, S235JRG2 (W.Nr. 1.0038) S235J2G3 (W.Nr. 1.0116), S355J2G3 (W.Nr. 1.0570) | EN 10250-2 |
Alloy special steels | 20MnMoNi4-5 | EN 10250-3 |
Stainless steels | X12Cr13, X3CrNiMo13-4 | EN 10250-4 |
Nickel steels | 12Ni14 (W.Nr. 1.5637), X12Ni5 (W.Nr. 1.5680) | EN 10222-3 |
Weldable fine grain steels | P285NH (W.Nr. 1.0477), P355NH (W.Nr. 1.0565) P420NH (W.Nr. 1.8932), P285QH (W.Nr. 1.0478) P355QH1 (W.Nr. 1.0571), P420QH (W.Nr. 1.8936) | EN 10222-4 |
Carbon steel forging | C22, 20Mn5, 20Mn5N, 20Mn5V, S235JRG2 (W.Nr. 1.0038) S235J2G3 (W.Nr. 1.0116), S355J2G3 (W.Nr. 1.0570) | EN 10250-2 |
Applications