What does Ttma flange mean?

Tank Truck Manufacturers Association
Flange connections are manufactured to connect with the TTMA (Tank Truck Manufacturers. Association) flange pattern, see below for flange dimensions.

How do you measure a 4 bolt flange?

MEASURING A STANDARD FLANGE Measure across the centre from one side of the internal hole to the opposite side of the hole. Measure across the centre from the external edge to the other external edge of the flange. Measure from centre of the bolt hole to centre of the opposite bolt hole.

What is ANSI flange?

The ANSI Class rating of a flange is defined as the maximum amount of pressure that the flange can withstand at increasing temperatures. There are seven primary pressure classes for flanges. They are 150, 300, 400, 600, 900, 1500, and 2500.

How do you read a flange size?

Use a ruler or measuring tape to find the diameter of your nipple (the horizontal width across it) in millimeters (1 cm = 10mm). Measure the nipple alone, do not include the areola, which is the outer edge around your nipple. Add 4 mm to this measurement, so if your nipple is 20 mm across, your flange size is 24 mm.

What is ANSI connection?

The following is a list of the most common end connections for valves: ANSI Flanges — are connections that do not have threads, but rather a rim at the end of a pipe or valve for a bolted connection to a corresponding rim at another pipe or valve. They are useful for quick and easy removal from the line.

What is the difference between DIN and ANSI flanges?

The Difference Between ANSI and DIN DIN is most commonly specified in European countries, while ANSI is usually specified in the United States. Therefore, the majority of factories in North America are likely to have piping that is ANSI certified, while similar plants in European countries have DIN piping.

How do you specify flanges?

FLANGE SIZES

  1. the nominal size (i.e. the bore size of the flange, to match the bore size of the connecting pipe)
  2. the flange rating (which designates the pressure/temperature performance of the flange, i.e. 150#, 300#, 400#, up to 2500#)
  3. the schedule for welding neck flanges (that should match the pipe schedule)

What do the numbers mean on a flange?

the nominal size (i.e. the bore size of the flange, to match the bore size of the connecting pipe) the flange rating (which designates the pressure/temperature performance of the flange, i.e. 150#, 300#, 400#, up to 2500#) the schedule for welding neck flanges (that should match the pipe schedule)