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  • Generic Marking Standards and Requirements for valves, fittings, flanges

    Generic Marking Standards and Requirements Component Identification The ASME B31.3 Code requires random examination of materials and components to ensure conformance to listed specifications and standards. B31.3 also requires these materials to be free from defects. Component standards and spec...
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  • Torque Tightening for flange

    Torque Tightening To obtain a leak-free flange connection, a proper gasket installation is needed, the bolts must be assign on the correct bolt tension, and the total bolt strength must be evenly divided over the whole flange face. With Torque Tightening (the application of preload to a fasten...
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  • Flanges Gaskets & Bolts

    Flanges Gaskets & Bolts Gaskets To realize a leak-free flange connection gaskets are necessary. Gaskets are compressible sheets or rings used to make a fluid-resistant seal between two surfaces. Gaskets are built to operate under extreme temperature and pressures and are available in a wide ...
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  • Flange Face Finish

    Flange Face Finish Flange face finish The ASME B16.5 code requires that the flange face (raised face and flat face) has a specific roughness to ensure that this surface be compatible with the gasket and provide a high quality seal. A serrated finish, either concentric or spiral, is required wi...
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  • Flange Faces

    Flange Faces What is a Flange face? Different types of flange faces are used as the contact surfaces to seat the sealing gasket material. ASME B16.5 and B16.47 define various types of flange facings, including the raised face, the large male and female facings which have identical dimensions to...
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  • Types of Flanges

    Types of Flanges Flange types As already described before, the most used flange types ASME B16.5 are: Welding Neck, Slip On, Socket Weld, Lap Joint, Threaded and Blind flange. Below you will find a short description and definition of each type, completed with an detailed image. Most common flang...
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  • Pressure Classes of Flanges

    Pressure Classes of Flanges Forged steel flanges ASME B16.5 are made in seven primary Pressure Classes: 150 300 400 600 900 1500 2500 The concept of flange ratings likes clearly. A Class 300 flange can handle more pressure than a Class 150 flange, because a Class 300 flange are co...
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  • What is a flange?

    What is a Flange? Flanges General A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. It also provides easy access for cleaning, inspection or modification. Flanges are usually welded or screwed. Flanged joints are made by bolting together two fla...
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  • What is the difference between Pipe and Tube?

    What is the difference between Pipe and Tube? People use the words pipe and tube interchangeably, and they think that both are the same. However, there are significant differences between pipe and tube. The short answer is: A PIPE is a round tubular to distribute fluids and gases, designated by...
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  • Steel Pipe and Manufacturing Processes

    Steel Pipe and Manufacturing Processes Introduction The advent of rolling mill technology and its development during the first half of the nineteenth century also heralded in the industrial manufacture of tube and pipe. Initially, rolled strips of sheet were formed into a circular cross section b...
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  • Nominal Pipe Size

    Nominal Pipe Size What is Nominal Pipe Size? Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. The name NPS is based on the earlier “Iron Pipe Size” (IPS) system. That IPS system was established to designate th...
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  • Definition and Details of Pipe

    Definition and Details of Pipe What is a Pipe? Pipe is a hollow tube with round cross section for the conveyance of products. The products include fluids, gas, pellets, powders and more. The word pipe is used as distinguished from tube to apply to tubular products of dimensions commonly used for...
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