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Flange & Fitting


Standard specifications and technical requirements for various flanges and fittings.

EN 1092-1 Type 34 Weld Neck Collar

Construction, Drawing & Function The EN 1092-1 Type 34 weld neck collar resembles a weld neck flange. It consists of a tapered hub with a short straight length plus a flared end. The taper of the hub generally has an angle not exceeding 7° on the outside surface for forging purpose. The tapered section of the hub provides an enhancement …

EN 1092-1 Type 32 Weld-On Plate Collar

Construction (Drawing) & Function The EN 1092-1 Type 32 weld on plate collar is a typical flat metallic ring available in PN 6, PN 10, PN 16, PN 25 and PN 40. The bore diameter B is exactly the same as that of the Type 01 flange but a bit smaller than that of the mating Type 02 loose plate …

EN 1092-1 Type 02 & Type 04 Loose Plate Flanges

Construction Characteristics Both EN 1092-1 Type 02 and Type 04 flanges are loose plate flanges, which resemble the function of lap joint flanges of ASME B16.5. They can be viewed as a Type 01 slip-on plate flange with enlarged bore diameter and chamfered end to facilitate the insert of a lapped collar. Bolt holes shall be drilled along the periphery …

EN 1092-1 Type 05 Blind Flange

Technical Drawing & General Introduction The EN 1092-1 Type 05 flange shall be provided as blind flange, which is used to blank off the piping. Substantially, it is a round solid disc with bolting holes drilled along the circumference. The EN 1092-1 Type 05 blind flanges may be furnished with flat facing (FF) or raised facing (RF). Dimensions & Masses …

EN 1092-1 Type 11 Weld Neck Flanges

The EN 1092-1 Type 11 flanges are weld neck flanges, which have the same function and usage as that of ASME B16.5. It can be joined to piping by a butt welding process. The EN 1092-1 Type 11 weld neck flanges cover all standard PN designations: PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, …

EN 1092-1 Type 01 Plate Flanges

Technical Drawing & General Introduction The EN 1092-1 Type 01 flange is also known as “plate flange for welding”. Usually, it is also called “steel ring flange” or “S/O plate flange”. It is a loose type flange which is very similar to slip on flange but without hub. The Type 01 plate flange can slip onto the pipe prior to …

ASME B16.9 Reducer

Technical Drawings The reducers are often used when the piping designers want to reduce the diameter of a straight run of pipe. There are two styles of standard reducers available in ASME B16.9: Concentric – having a common centerline; Eccentric reducer – having offset centerlines. Dimensions *NPS: Nominal Pipe Size; O.D L: Outside Diameter at Bevel, large end; O.D S: …

ASME B16.9 Caps

Technical Drawings The cap is used to seal an open end of the pipe. In piping engineering, the cap made in accordance with ASME B16.9 will be welded to the end and need not be included in the length dimension of the run of pipe. Dimensions *NPS: Nominal Pipe Size; O.D: Outside Diameter at Bevel; E: Length[NOTE(1)]; E1: Limiting Wall …

ASME B16.9 Lap Joint Stub End

Technical Drawings The lap joint stub end is required when attach the lap-joint flange to the piping system. The stub end and lap-joint flange assembly are used mainly in piping systems that necessitate frequent dismantling for inspection or routine maintenance. It is also used in the erection of large diameter or hand-to-adjust piping configurations because of the assembly’s quick bolt …

ASME B16.9 Reducing Tee & Reducing Cross

Technical Drawings The reducing tee or the reducing cross has same function as that of a straight tee or a straight cross, respectively, except that the branch outlet is a smaller pipe size. Dimensions *NPS: Nominal Pipe Size; O.D: Outside Diameter at Bevel. *NPS: Nominal Pipe Size; C: Center-to-End, Run; M: Center-to-End, Outlet. *Click to view dimensions of other ASME …

ASME B16.9 Straight Tee & Cross

Technical Drawings The ASME B16.9 straight tee is a three-way fitting used to make perpendicular connections to a pipe. Its name comes from its resemblance to the letter T. The ASME B16.9 straight cross is a four-way fitting used to make double perpendicular connections to the pipe. It resembles a crossroad. Lines that connect to the main run of pipe …

ASME B16.9 3D Radius Elbows

Technical Drawings According to ASME B16.9-2018, the standard 3D radius elbow may be furnished in 45° or 90°. Compared to the long radius elbow, its center-to-end dimension is much larger, which is double the length of a corresponding L/R elbow. The center-to-end dimension can be calculated as “3 x NPS” in inch unit. Thus, it provides much smoother flow characteristics. …

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