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Welcome to Projectmaterials Wiki

#1 Knowledge Base for Pipes, Valves, Fittings

Type of valves used in petrochemical downstream applications and pipelines (gate, globe, check, butterfly, pinch, plug, y-strainers, etc)

Plug Valve API 6D Explained

API 6D plug valve features a cylindrical or conic disc, with one or multiple horizontal hollow passageways, that can be rotated to open, close or control the flow of the fluid through the valve. The most used type is the two-port lubricated type with an open and closed position. WHAT IS A PLUG VALVE? This… read more »

Y-Strainer and Basket Strainer for Pipes

Strainers are mechanical devices to retain (and remove) foreign particles from flowing liquids and protect equipment such as pumps and compressors. There are several types of strainers, including the Y, basket and duplex types. A critical element is the strainer’s screen, specifically its mesh size (perforation density).  PIPE STRAINERS TYPES There are two basic designs… 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 »

OCTG Pipes API 5CT (Types, Dimensions, Materials, Suppliers)

What are OCTG pipes? Oil country tubular goods are pipes used for onshore and offshore oil & gas upstream operations (extract oil and gas from the wellbore). OCTG pipes may be classified into three main families: drill pipes (to perforate the soil and reach the reserve), casing pipes (to consolidate the well and prepare it… read more »

Line Pipe API 5L Gr. B to X80 (PSL1/2)

With this article, you learn about API 5L pipes. The API 5L specification covers seamless and welded pipes to convey oil, gas, water in the natural oil & gas and petrochemical industries. API 5L line pipes are available in multiple carbon steel grades, designated as Grade B, X42, X46, X52, X56, X60, X70, X80 and in PSL1 or PSL2… read more »

Valve Face to Face Dimensions (ASME B16.10)

What is the face to face dimension of a flanged ball, globe or gate valve? The ASME B16.10 chart answers this question, as it standardizes the distance between the inlet and the outlet of the most common flanged valves. The purpose of this ASME specification is to ensure the interchangeability of valves produced by different manufacturers. … 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 »

Difference between Cast and Forged Steel

Steel products may be manufactured either by casting or forging steel. Steel casting is the process by which a metal is heated until it reaches a liquid state and then poured into a mold that shapes the desired product. Steel forging implies the application of mechanical forces to heated solid blocks of steel (such as… read more »

Flange Isolation Kit for Cathodic Protection

A flange isolation kit protects a flanged joint from the corrosion from static currents (by preventing a metal-to-metal contact among flanges, stud bolts, and gaskets). A flange insulation kit consists of one washer for each nut, one full-length insulating sleeve for each bolt, a gasket (type F, E, D, O), and thick plated steel washers for… read more »

Alloy Steel Pipe A335 Gr. P5, P9, P11, P22, P91

Learn about the alloy steel pipes specification ASTM A335 that covers “chrome-moly” seamless pipes with remarkable resistance to corrosion and good tensile strength at high-temperature service. Generally, ASTM A335 P11, P22, and P91 pipes are used in power generation and in downstream oil and gas, P5 and P9 grades are for refinery applications. ALLOY PIPE A335… read more »

LEL and UEL for Explosive Gases Explained

The lower explosive limit (LEL) is the minimum concentration of a specific combustible gas required to fire combustion when in contact with oxygen (air). If the concentration of the gas is below the LEL value, the mix between the gas itself and the air is too weak to spark. The upper explosive limit (UEL) is the… read more »

Steel Nuts for Stud Bolts (ASTM A194)

Hexagonal steel nuts for stud bolts charts: dimensions (nuts width and thickness), weight (in kilograms and pounds), material specifications ASTM A194 and metric grades. STEEL NUTS SIZES Nuts width and thickness   HEAVY HEX NUTS DIAMETER (inches) Width Across Flats Width Across Corners F C Basic Max Min Max Min 1/2 7/8 0.875 0.850 1.010 0.969… read more »

Stainless Steel and Duplex Pipe (ASTM A312, A790)

The ASTM A312 specification covers seamless and welded austenitic stainless steel pipes used for high temperature and/or corrosive service (the most common grades are 304/304L and 316/316L). The A790 specification covers seamless duplex and super duplex pipes UNS S32205/31803 and UNS S32750/32760 (special SS grade with a mixed ferritic/austenitic microstructure). In this article, we illustrate the… read more »

Flange Gaskets Types (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 »

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