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Types of Gaskets for Flanges (Soft, Spiral, Ring Joint)

Learn about the 5 key flange gaskets types (used in the oil and gas industry): non-asbestos gaskets full and raised face (used for low-pressure, low-temperature and non-critical applications), spiral wound gaskets (for higher temperature and pressure oil and gas applications), Ring joint gaskets style R, RX, BX (for RTJ flange faces), Kammprofile and Jacketed gaskets. The article… read more »

How to Select the Right Flange Gasket?

How to select the right gasket for a piping application? To choose the proper flange gasket, piping engineers should take into consideration the following 4 key factors: fluid type, process temperature/pressure, fugitive emissions Laws, other general considerations. While gaskets are relatively cheap components of the overall piping system, they are critical for its reliability and integrity:… read more »

Threaded Flange Dimensions EN 1092 (PN 6/16)

Dimensions and weights charts of PN 6, 16 threaded flanges EN 1092-1 Type 13, with weights and stud bolt requirements. THREADED FLANGE DIMENSIONS (EN 1092-1 TYPE 13) PN 6 PN 6 threaded flange dimensions (EN 1092-1 type 13) with stud metric bolts and nuts requirements Sizes in millimeters Flange DN  Flange Neck Raised face Screws… read more »

Weldolet Dimensions Charts (MSS-SP 97)

Weldolet dimensions and weights (“center of the run to Weldolet face”,  “size-on-size” and “reducing” Weldolets sizes by NPS and schedule, and “run sizes combinations”). WELDOLET DIMENSIONS “Center of Run to Face” Size The distance between the run pipe center line and the Weldolet top-bore in mm (by pipe NPS/Schedule and Weldolet size): RUN PIPE NPS… read more »

What is a Hydrostatic Test?

The hydrostatic test consists of filling a piece of equipment with a fluid at test pressure, for a given period of time, to check the existence of leakages. The test is passed if the equipment bears the test pressure without any leakage.  HYDROSTATIC TEST The hydrostatic test is a common procedure to test piping equipment,… read more »

Double Ferrule Compression Fittings

Compression fittings are used to create leak-free tube connections easily and quickly. Double ferrule compression fittings feature an outer nut, two deformable ferrules in soft alloy or non-ferrous metals and, a tube fitting body and are available for metric and fractional tube sizes. When the fitting nut is screwed on the tube, the ferrules get deformed to… read more »

Socket Weld Flange Dimensions (ASME B16.5)

The charts show the dimensions of socket weld flange class 150, 300, 400, 900, 1500, 2500 in inches and in millimeters. SOCKET WELD FLANGE DIMENSIONS IN INCHES SOCKET WELD CLASS 150 (IN INCH) Dimensions of socket weld flange class 150 (in inches) NPS ID OD Bolt Circle (BC) Raised Face (R) Raised Face (RF) H D ID 2*… read more »

ASME B16.47 Flanges Dimensions and Weights

The charts show the dimensions of ASME B16.47 large size flanges class 150, 300, 400, 600, 900 (from 26 to 60 inches in diameter). ASME B16.47 SERIES A FLANGE DIMENSIONS CLASS 150 Dimensions of ASME B16.47-A flanges class 150 All ASME B16.47 flanges dimensions are in inches Flange NPS Outside Diam. Minimum Thickness O.D. of… read more »

Stub Ends for Flanged Joints

What is a stub end and why should it be used? Stub ends are buttweld fittings that can be used (in combination with a lap joint flange) alternatively to welding neck flanges to make flanged connections. The use of stub ends has two advantages: it can reduce the total cost of flanged joints for piping… read more »

Spectacle Blind, Flange Spade, Ring Spacer (ASME B16.48)

Spectacle blind, flange spade, and ring spacer are forged products used to blind pipelines (temporarily or permanently). These devices are cost-effective alternatives to isolation valves. A spectacle blind combines, in one single product, a flange spade and a ring spacer. Flange spades and ring spacers, as separate products, are used when the rotation of a spectacle… read more »

Orifice Flange Explained (ASME B16.36)

An Orifice Flange is used in combination with orifice meters to measure the flow rate of oil, gas and other liquids conveyed by the pipeline. Orifice flanges are manufactured to ASME B16.36 in multiple sizes and, material grades.  WHAT IS AN ORIFICE FLANGE? An orifice flange is used to measure the flow of the fluid conveyed… read more »

ASTM vs. EN Pipe Specifications

An overview of the most common ASTM and EN/DIN pipe specifications, material grades within each specification, and, when possible, the equivalent grades between ASTM vs. EN pipe grades. CARBON STEEL PIPES Application Pipe Specifications Material Grades High-temperature Carbon Steel EN 10225 S355G15, S460G6 BS 7191 355EM API 5L Grade B, X42, X52, X56, X60, X65,… read more »

Pipe Coating, Lining and Cladding

What is the difference between external pipe coating and internal pipe-lining and cladding? External pipe coatings are used to protect the metal from corrosive environments (3LPE coated pipes are the most common choice). Internal lining (example PTFE) protects the pipe from corrosive fluids. Clad pipes (CRA) have the inner surface covered by higher grade materials to… read more »

BWG and SWG Tube Size Chart

BWG and SWG are alternative measurements for steel tubing sizes (outside diameter and wall thickness). BWG stands for “Birmingham Wire Gauge” (or “Stubs Iron Wire Gauge”). Each BWG number (example from 10 to 22) represents a specific steel tubing thickness, which can be converted in inches or mm. SWG stands for “Standard Wire Gauge” (also… read more »

ASME B36.10/36.19 Pipe Dimensions Charts

Looking for steel pipe size charts? The ASME B36.10 and ASME B36.19 specifications cover the dimensions of seamless and welded steel pipes for high and low-temperature service, providing combinations of pipe outside and inside diameter (OD, ID), pipe thickness (WT, designated in “schedule”) and pipes theoretical weights (in pounds per foot and kilogram per meter)…. read more »