What is the difference between ASME B16 47 Series A and Series B?
So what is the difference between ASME B16. 47 Series A and Series B (API605) flanges? Generally speaking, ASME B16 47 Series A flanges are much thicker, heavier and stronger than Series B flanges in the same size and pressure rating thus can withstand more external loading than Series B type.
How do you size a blind flange?
One side into the middle of the one bolt hole and measure to the middle of the opposite.
What is a spectacle blind?
Spectacle Blinds are simple safety devices that are installed between two pipe flanges. During normal operation, the open end is installed as a spacer to allow uninterrupted flow. To stop the flow in the pipeline, the blind end is rotated into place between the flanges.
What is difference between spectacle blind and spacer?
Spades and Ring Spacers are basically the same as Spectacle Blinds, except that both are not attached to each other. Spades and Spacers be applied in systems where maintenance is often not necessary, or in applications with large pipe sizes.
What is the difference between ASME and ANSI flanges?
ASME Flanges are based on guidelines and regulations for mechanical devices, while ANSI Flanges are based on standards developed by associations. ANSI flanges are generated using approximately 9500 standards, whereas ASME flanges are produced using 600 codes and regulations for various mechanical devices.
What does ASME B16 5 mean?
ASME has been defining piping safety since 1922. ASME B16. 5 Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard covers pressure-temperature ratings, materials, dimensions, tolerances, marking, testing, and methods of designating openings for pipe flanges and flanged fittings.
What is blind flange?
A blind flange is a solid disk used to block off a pipeline or to create a stop. Similar to a regular flange, a blind flange has mounting holes around the perimeter and the gasket sealing rings are machined into the mating surface. The difference is that a blind flange has no opening for fluids to pass through.
How many types of blind flanges are there?
The most common two types are the flat face (FF) and the raised face (RF) blind flange.
Why are spectacle blinds used?
A spectacle blind or spec blind, abbreviated as SB, is a safety device used to isolate a section of line or piece of equipment when the line or equipment needs to be inspected or removed from service. It is different than a valve in that the blind is a permanent or long term isolation device.
How many types of blinds are there in piping?
Types of Line Blinds
Line Blinds come in three basic forms with different names. These names include Spectacle Blinds, Figure Eights, Paddle Blinds, Skillet Blinds, Spades, and so on. These names describe particular devices used to isolate or “turn off” portions of piping systems.
Where do you put spectacle blinds?
Common locations for spectacle blind installation include: In bypass lines. At inlets and outlets of rotary or static equipment. At inlets and outlets of storage and processing vessels.
…
Spectacle Blind Installation
- Female ring-joint blanks.
- Male ring-joint blanks.
- Raised face blanks.
- Flat face blanks.
What is spacer and blinds?
Spectacle blind and Spacers are a pressure-retaining device used in the piping/pipeline industry to temporarily or permanently blind (shut) or isolate part of the piping or pipeline system. A spectacle blind is a forged product and combination of a flange spade and a ring spacer in one single product.
What is difference between ASME and ASTM?
Basically ASTM creates the material specifications and standard test methods to determine compliance. ASME selects those ASTM materials which will perform adequately in boiler or pressure vessel service and accepts them with stated limitations.
Is ANSI now ASME?
The American National Standards Institute, also abbreviated as ANSI, and the American Society of Mechanical Engineers, also abbreviated as ASME, are both private, non-profit organizations mainly focusing on bringing uniformity in voluntary standards used in the engineering discipline.
Is ANSI same as ASME?
ANSI establishes and accredits performance and quality standards for products and services in a wide variety of sectors, while ASME is primarily focused on boilers and pressure vessels.
What does ASME B16 20 mean?
Metallic Gaskets for Pipe Flanges
As specified by the ASME (American Society of Mechanical Engineers), standard B16. 20 refers to “Metallic Gaskets for Pipe Flanges—Ring Joint, Spiral-Wound, and Jacketed.” In the organization’s own words, ASME B16. 20: “offers comprehensive solutions applying to materials, dimensions, tolerances and marking.
What is the difference between a flange and a blind flange?
What are blind flanges?
The blind flange is basically a flange that does not have a hub or a bored center. Blind flanges have the face thickness of a flange, a matching face type, and similar bolting pattern. Blind flanges can also be used to seal a nozzle opening on a pressure vessel.
Does spectacle blind need gasket?
A spectacle blind is machined from a single piece of metal that is cut to match the pipe size, fit between two pipe flanges and requires an additional gasket when it is installed.
What is a figure 8 blind?
An ‘8 blind’ or a ‘spectacle blind’ is a piping fitting that is used for providing positive isolation. It consists of a pair of metal discs attached to each other as shown in the figure. They are also known as ‘line blanks’, since they are used to blank a line.
How do you install spectacle blind flange?
Spectacle Blind Installation
Spectacle blinds install between two horizontal pipe runs. Instead of bolting the blind in place around the full circumference of the pipe like you would a pipe flange, you instead install it by inserting one of the flange bolts through the hole on the central tie bar.
Is ASME code or standard?
ASME is the leading international developer of codes and standards, hereafter referred to as standards, associated with the art, science, and practice of mechanical engineering. ASME is the globally recognized, trusted source of consensus standards since 1884.
Is ANSI and ASME the same?
What is difference between ASTM and ASME?