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00:00:00 – 00:13:51
The video from hardhatengineer.com provides a comprehensive overview of piping specifications and classes, focusing on various technical elements essential in the piping industry. Key aspects discussed include the design, engineering, procurement, fabrication, installation, and commissioning of piping systems. Specific focus is given to a high-pressure carbon steel material class, E61A, detailing its applications, allowable stresses, and safety requirements. The video also examines rigorous standards for hydrogen services in refineries, emphasizing safety protocols like double isolation for instruments and extensive non-destructive testing.
Furthermore, detailed specifications for various components such as pipes, flanges, fittings, and valves are covered. These specifications include material grades, dimensions, types of welding joints, and relevant industry standards like ASME and ASTM. To ensure safe and optimal operation, stringent testing, and material standards are highlighted, specifically for environments with hazardous substances such as hydrogen. The overall theme revolves around the meticulous standards and requirements mandated in the piping field to ensure structural integrity and operational safety.
00:00:00
In this segment of the video, the presenter from hardhatengineer.com discusses the concepts of pipe class and piping specification. Piping specification is described as a database that outlines requirements for design, engineering, procurement, fabrication, installation, and commissioning, covering aspects like minimum flexibility requirements, allowable stresses, and reinforcement needs for design, and details for drawings, plant layout, and material take-off for engineering. Procurement specifications include material-specific requirements such as maximum carbon percentage and heat treatment needs. Fabrication, installation, and commissioning specifications address welding, NDT, PWHT, painting, and pipeline cleaning.
Pipe class, on the other hand, is a document specifying the dimensional and material specifications of pipes, fittings, and valves, including base material, pressure-temperature ranges, and corrosion allowances. It mentions that pipe class can vary by company but generally provides the same information across different organizations. The video aims to clarify these terms and their applications in the piping field.
00:03:00
In this part of the video, the presenter discusses a specific piping material class for high-pressure carbon steel services, designated as E61A, explaining that each digit in the designation has a specific meaning. This class is rated for a pressure-temperature minimum of 900 pounds, uses carbon steel with a 3 mm corrosion allowance, and is suitable for hydrogen-bearing hydrocarbon services with wet H2S and amine. A table provides guidance on allowable stress based on temperature and pressure. Special attention is given to the notes and special notes, which define use restrictions and special requirements. Key notes include restrictions on valve types, material normalization for carbon steel over 3/8” thickness, a maximum weld hardness of 200 BHN, and the requirement for 100% radiographic and magnetic particle testing for girth welds using the wet fluorescent method.
00:06:00
In this segment of the video, the presenter goes over several crucial notes and requirements for working with hydrogen services in refineries. Specifically:
– Note 62 stipulates that any fluid medium with hydrogen and a service pressure above 100 PSI should be classified as hydrogen service due to hydrogen’s hazardous nature.
– Note 90 mandates that instrument connections must utilize double isolation types, requiring two valves for any instrument taps.
– Note 93 specifies additional material testing as per MR0103 standards, particularly for materials at risk of sulfide stress corrosion, common in hydrogen-bearing hydrocarbon services with wet H2S and amine.
– Note 151 outlines non-destructive testing (NDT) requirements referencing different specifications.
– Note 152 requires that the first valve for flow, pressure, and temperature measurement must be metal-to-metal seated.
– There are further restrictions: all maintenance joints must be flanged (minimizing leakage risks) and all pipe joints must be butt welded, prohibiting socket and fillet welds.
– Drain and vent usage instructions are provided, and all temperature and pressure connections must adhere to specified sizes (1.5” and 0.75”, respectively).
– A size chart indicates the appropriate connections for various pipe sizes, with examples of when to use equal tees, weldolets, and unequal tees based on the branch and run sizes.
This comprehensive overview highlights the stringent requirements for safely handling hydrogen services in refinery settings, ensuring safety and integrity in operations.
00:09:00
In this part of the video, the presenter details the specifications for various piping components, including pipes, flanges, and fittings. The pipe sizes range from 0.5 inch to 20 inches, with thickness from schedule 100 to 120, adhering to ASME B36.10 standards. Materials vary by size: up to 14 inches are ASTM A106 Gr B seamless pipes, and 16 to 20 inches are ASTM A672 Gr B60 Cl 32 welded pipes, with beveled ends for butt welding. For flanges, smaller sizes up to 2.5 inches are rated 1500 with RTJ faces, and larger sizes up to 20 inches are rated 900 class RTJ with 63 AARH finishes, using A105 forged material. Weld neck and blind flanges follow ASME B16.5, while Figure 8 spacers and spades adhere to ASME B16.48. All listed fittings are butt weld and long radius elbows, made from A234 WPB material, with seamless and welded types following ASME B16.9. Matching pipe schedules dictate the selection of fittings, with tees noting dual schedules for run and branch pipes, and MSS SP-97 guiding weldolet dimensions.
00:12:00
In this segment of the video, the speaker discusses different types of valves and their specifications, including materials used, such as forged type A105 for the valve body, stellited trims, and SS316L for the stem. Two standards are mentioned for valves: one for pressure-temperature rating and another for end-to-end dimensions. Additionally, stud and nut materials are specified as ASTM A193 grade B7M and ASTM A194 grade 2HM, respectively, with ASME B18.2 being the applicable standard. The segment also covers gasket specifications for RTJ type flanges, particularly octagonal O-ring gaskets made of soft iron for 900 and 1500 class. The speaker encourages viewers to download related PDF resources from the description link and visit the website for more information on pipe classes.