Flowline Equipment

Data Headers

Commonly used in well testing operations, the data header is an instrumented piping "sub" for fluid data collection.



  • Buttweld ends (mainly long pattern up to 2m).
  • Integral machined (mainly short pattern 0.5 to 1 m).


Port size & type:

½'' NPT – Straight or 45° to flow direction.

¾'' NPT – Straight or 45° to flow direction.

Autoclave - Straight or 45° to flow direction.

Other types and sizes per API 6A.



  • ½" NPT threads are limited to 10000 PSI CWP
  • 45° to flow direction on long welded pattern only


Norms and Standards:

NACE MR 01-75,  AINSI B16-5, B31-3, API 6A. PED and CE compliance on request.


Pressure Rating:

Standard service: up to 20000 PSI.

H2S service: up to 15000 PSI.


Temperature Rating:

Standard: -29°C (-20°F) to +121°C (+250°F).

Low temperature: -40°C (-40°F) to +121°C (+250°F).

High temperature: -29°C (-20°F) to +177°C (+350°F).



End connections & nominal size:

  • Wing Unions
  • Flanges (ANSI B16-5 or API 6A)
  • Hubs (API 16A or Clamp connector type)
  • Common sizes: 2", 3" and 4"



  • 4, 6 or 8-port connections depending on header style
  • With or without needle valves
  • With or without thermowells
  • With or without gauges (PI, PT, TI, TT, etc.)
  • With or without stands



data headers








data headers


 integral construction







data headers


 welded construction