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FLANGES, GASKETS, STUD BOLTS

Flanges, gaskets and stud bolts used for flanged connections in piping systems (types of flanges/gaskets, specifications, dimensions and materials per ASME)

Flanges for Pipes and Piping Systems

In piping applications, a flange is used to join a pipe with other equipment (another pipe, a valve or a pump). Pipe flanges may be classified by shape (weld neck, blind, socket weld, threaded, etc), by facing type (RF, FF, RTJ), by material grade (cast and forged), and by specification (the ANSI/ASME B16.5 and B16.47 specifications… read more »

Stud Bolt for Flanges (ASME B16.5)

What is a stud bolt? Stud bolts for flanges consist of a fully threaded steel rod and two heavy hexagonal steel nuts. Stud bolts are inserted in the flange holes and tightened to seal a flanged joint. The number, the length, the diameter of the stud bolts required for a flanged connection depend on the… read more »

Stud Bolts Charts (Sizes, Weights, and Torque)

3 important stud bolts charts: 1- stud bolts dimensions in inches and millimeters (number, diameter, length of stud bolts for ASME flanges of different diameter and rating); 2- stud bolts weight (in kilograms and pounds for metric and imperial bolts, by diameter and length); 3- stud bolt torque chart (tightening sequence and load to ensure… read more »

Weld Neck Flange Dimensions (Cl. 150/300/900/1500/2500)

The charts show the dimensions of weld neck flange class 150, 300, 400, 900, 1500, 2500 in inches and in millimeters (with dimensional tolerances). WELDING NECK FLANGE DIMENSIONS IN INCHES WN CLASS 150 (IN INCH) Weld neck flange dimensions class 150 (ASME B16.5) in inches Flange NPS Inside Diameter Outside Diameter Bolt Circle (BC) Raised… read more »

Weld Neck Flange Dimensions EN 1092 (PN 6/10/16/25/40)

Dimensions and weights charts of PN 6/10/16/25/40 weld neck flanges EN 1092-1 Type 11, with weights and stud bolt requirements. WELD NECK FLANGE DIMENSIONS (EN 1092-1 TYPE 11) PN 6 PN 6 weld neck flange dimensions (EN 1092-1 type 11) with stud metric bolts and nuts requirements Sizes in millimeters WN Flange DN  Flange Neck… read more »

Types of Flanges in Piping (Quick Review)

Which are the most common types of flanges used in piping? How do they look like? The key types of flanges are the welding neck, long welding neck, slip-on, socket weld, lap joint, threaded and blind flanges. In addition to these standard flanges, some special ones exist, called Weldoflange/Nipoflange and Elboflange, swivel flange, expander/reducer flange, and… read more »

Materials for Pipe Flanges (ASTM)

The most common materials for pipe flanges (forged grades) are: ASTM A105 (carbon steel high temperature to match A53/A106/API 5L pipes), A350 Grades LF1/2/3 (carbon steel low temperature to match A333 pipes), A694 Grades F42 to F80 (high yield carbon steel to match API 5L pipe grades), ASTM A182 Grades F5 to F91 (alloy steel… read more »

Plate Flange Dimensions EN 1092 (PN 6/10/16/25/40)

Dimensions and weights charts of PN 6/10/16/25/40 plate flanges EN 1092-1 Type 01, with weights and stud bolt requirements. PLATE FLANGE DIMENSIONS (EN 1092-1 TYPE 01) PN 6 PN 6 plate flange dimensions (EN 1092-1 type 01) with stud metric bolts and nuts requirements Sizes in millimeters Flange DN Pipe Flange Stud Bolts Flange Weight… read more »

Blind Flange Dimensions (Cl. 150/300/900/1500/2500)

The charts show the dimensions of blind flange class 150, 300, 400, 900, 1500, 2500 in inches and in millimeters. BLIND FLANGE DIMENSIONS IN INCHES BLIND CLASS 150 (IN INCH) Blind flange dimensions class 150 in inches FLANGE NPS Outside Diameter Bolt Circle (BC) Raised Face (R) Raised Face (RF) Raised Face Thickness (T) Flat… read more »

Blind Flange Dimensions EN 1092 (PN 6/10/16)

Dimensions and weights charts of PN 6/10/16/25/40 blind flanges EN 1092-1 Type 05, with weights and stud bolt requirements. BLIND FLANGE DIMENSIONS (EN 1092-1 TYPE 05) PN 6 PN 6 blind flange dimensions (EN 1092-1 type 05) with stud metric bolts and nuts requirements Sizes in millimeters Flange DN Nominal Diameter Flange Stud Bolts Flange… read more »

Flange Pressure Rating Explained (and Charts)

What means ANSI flange pressure rating? How to select the right flange rating? The term “flange rating” (or class) refers to the maximum pressure (in psi or bars) that a flange withstands at increasing temperatures. Flanges with a higher rating (class) are stronger than flanges with lower ratings, as they bear more pressure at increasing temperatures. Flanges made… read more »

Slip On Flange Dimensions (Cl. 150/300/900/1500/2500)

The charts show the dimensions of slip on flange class 150, 300, 400, 900, 1500, 2500 in inches and in millimeters. SLIP-ON FLANGE DIMENSIONS IN INCHES SLIP-ON CLASS 150 Slip on flange dimensions class 150 in inches (ASME B16.5) FLANGE NPS Inside Diameter Outside Diameter Bolt Circle (BC) Raised Face (R) Raised Face (RF) H… read more »

Lap Joint Flange Dimensions (Cl. 150/300/900/1500/2500)

The charts show the dimensions of lap joint flange class 150, 300, 400, 900, 1500, 2500 in inches and in millimeters. LAP JOINT FLANGE DIMENSIONS IN INCHES LAP JOINT CLASS 150 (IN INCH) Lap joint flange dimensions class 150 in inches (ASME B16.5) FLANGE NPS Inside Diameter Outside Diameter Bolt Circle (BC) H T1 T2 RA Bolt… read more »

RF, FF, RTJ Flange Face and Finish

The flange face is the surface area that hosts the gasket. The 6 available types of flange face are flat (FF), raised (RF), ring joint (RTJ), lap joint, male and female (M&F), tongue and groove (T&G). Flanges with different faces require different gaskets and shall never be mated to prevent leakage of the joint. RF and… read more »

Threaded Flange Dimensions (Cl. 150/300/900/1500/2500)

The charts show the dimensions of threaded flange class 150, 300, 400, 900, 1500, 2500 in inches and in millimeters. THREADED FLANGE DIMENSIONS IN INCHES THREADED CLASS 150 Threaded flange dimensions class 150 in inches (ASME B16.5) FLANGE NPS Inside Diameter Outside Diameter Bolt Circle (BC) Raised Face (R) Raised Face (RF) H Raised Face… read more »

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