Piping Interview Questions Part-2 – Pipe Fittings Code and Standard

Piping Interview Questions Part-2 – Pipe Fittings Code and Standard


Welcome to Hardhatengineer.com. I am Varun
Patel. In this video, you will learn about most common questions regarding pipe fittings
code and standard that you may face during the interview.
You will learn about these questions; Which code and standard are used to select
Pipe, butt welding fittings, flanges, gasket, Socket & Threaded fittings, and Valves?
So please watch these till the end. And don’t forget to subscribe to my channel because
it helps me to increase my reach on YouTube and you will also get regular updates on a
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So let’s start with the question. Which code and standard are used to select
Pipe, butt welding fittings, flanges, gasket, Socket & Threaded fittings, and Valves?
You all know that different standards are used for different piping components. Let’s
start with pipe. A. Pipe
Selection of pipe material is done based on the piping design code such as ASME B31.1
for power piping and ASME B31.3 for Process Piping. Dimensions of carbon steel and stainless-steel
pipes are given in two different standards. ASME B36.10 covers dimensions for Welded & Seamless
wrought iron pipes whereas ASME B36.19 covers dimensions for Stainless steel pipes.
API 5L Specification of Line Pipe is also used in the petroleum industry.
B. Butt Welded Fittings Butt welded fittings which also known as a
Wrought Product (WP) dimensions and list of material that used to manufacture wrought
fittings is covered in − ASME B16.9- which is standard for Factory-made
Wrought Butt-welding Fittings for size NPS 1⁄₂ to NPS 48” and
− And B16.28- which is standard for Wrought Steel Butt-Welding Short Radius Elbows and
Returns for size NPS 1⁄₂ to NPS 24” C. Flanges
Here is the list of flange standard. • List of materials that used to manufacture
flanges are covered in ASME B16.5 & B16.47. • ASME B16.5 is a standard for Pipe Flanges
and Flanged Fittings that covers flanges sizes from NPS ½” to 24”
• Whereas ASME B16.47 is a standard for Large Diameter Steel Flanges that covers flanges
sizes from NPS 26” to 60” • ASME B16.1 is the standard for Cast iron
pipes flanges & flanged fittings. D. Gasket
• ASME B16.20 is a standard for Metallic gaskets for pipe flanges- Spiral wound, Octagonal
ring Joint & Jacketed flanges. • ASME B16.21 is a standard for Non-metallic
gasket. E. Socket & Threaded fittings
• ASME B16.11 is a standard for Forged steel socket welding & threaded fittings.
F. Valves – Different types of valves are used in process plant so there are many standards
for valves. I have covered most commonly used standards that interviewer may ask you.
• ASME B16.10 covers Face-to-Face and End-to-End Dimensions of Ferrous Valves
• ASME B16.5 covers dimension for flanged valve
• API 6D is used to design valve that used in transportation pipeline.
• API 600 is used for Bolted Bonnet Steel Gate Valves for Petroleum and Natural Gas
Industries • API STD 602 is used to design Compact
Steel Gate Valves – Flanged, Threaded, Welding, and Extended-Body Ends.
• API Standard 594 covers design, material, face-to-face dimensions, pressure-temperature
ratings, examination, inspection, and test requirements for Check Valves with Flanged,
Lug, Wafer and Butt-welding type ends. • API STD 599 covers design for Metal Plug
Valves with Flanged, Threaded, and Welding Ends, in sizes NPS 1 through NPS 24.
• API STD 609 is for Butterfly Valves with Double Flanged, Lug- and Wafer-Type.
• API STD 526 covers Flanged Steel Pressure Relief Valves.
• API Recommended Practise 520 Part 1 overs Sizing & Selection and Part-2 covers Installation
of Pressure-Relieving Devices in Refineries. • API STD 598 covers inspection, supplementary
examination, and pressure test requirements for both resilient-seated and metal-to-metal
seated gate, globe, plug, ball, check, and butterfly valves at the valve manufacturer’s
plant. Most of the standard that I have just explained
to you are used for dimensional inspection of the piping components. Some of them are
also used for the design of the components. This is the end of the video. I hope that
you have learn from this video. In next video, I will explain you some of the most common
material grade that used for manufacturing of the piping components. So keep on checking
my youtube channel for new video. Visit my website hardhatengineer.com for free
study materials and don’t forget to subscribe to my channel to get regular updates on new
video and also like and share my video with your friends. If you want to request a video,
please write in the comment. See you soon goodbye take care.

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