Pressure Test Caps & Plugs


Pressure testing down-hole equipment is a common practice. In order to hold the pressure each end shall be closed by:
  • Pressure test plug where the element to be tested has a box connection.
  • Pressure test cap where the element to be tested has a pin connection.

The pressure test caps and plugs shall meet the following requirements.

  • Meet all safety standards regarding use of pressure testing equipments.
  • Fit the connection to be tested. (see VAM® Compatibility rules).
  • Ability to hold the required test pressure.
  • Easy to install and remove.
  • Withstand numerous make and break.
  • Shall be designed to prevent any change the dimensional characteristics of the connection after test.
  • Shall not damage the connection due to makeup and breakout (removal of the surface treatment, galling of the threads or sealing area…).
  • May be used with any type steel.

For safety reasons it is not recommended to use gas as pressure medium.

“Type-1” (Also called “Metal to Metal Pressure Test Fixtures”): Here the pressure tightness is achieved by metal to metal seal engagement (just like the product). Although designed to minimize the torque to be applied, these test fixtures need a power tong to reach the necessary complete make-up whenever the product sizes is greater than 5 inches (make-up torque = 25% lowest weight and grade of the corresponding OD).

The “Type-1” is available for all VAM® Connections and may be purchased from any VAM® Licensee or approved suppliers. For more information on ordering these contact Mr Help.

These “Type-1” test caps or plugs will not generate any product deformation under pressure only if the make-up with the product to be tested is complete i.e.: at shoulder point. It is reminded that inserting any kind of seal ring between the shoulders to escape the power make-up shall be banned because it causes permanent deformation of the product.

As there is metal to metal seal engagement a particular care shall be taken about using and applying the proper thread compound. A systematic inspection shall be conducted before each engagement to prevent damaging the product due to galled or indented seal of the test cap or plug.


“Type-2” (Also called “Soft Seal Low Torque Pressure Test Fixures”): Here the pressure tightness is achieved by a specially designed polymeric seal ring.

  • No risk of seal damage (thanks to specific soft seals).
  • Real hand-tight solution for all sizes. No need of power tong, a wrench is enough.
  • No deformation after test, the connection remains “new” after pressure test this has been proven by tests.
  • Keep control on condition and serviceability through rental only.
  • Available on rental (short term or long term agreements) or for sale.
  • VAM® TOP Type 2 are suitable for hydro-testing up to 15 Ksi or gas testing up to 7,5 Ksi for some sizes.
  • VAM® 21 Type 2 are suitable for both hydro-testing and gas testing up to 15 Ksi.
  • Easily available through VAM® Services.
  • Supplied in a PELI-CASE easily transportable.

At the moment the “Type-2” is available for VAM® TOP, VAM® TOP HC and VAM® TOP HT from 2 3/8” up to 14” and for VAM® 21.
For any question you may have on their availability or to order them, please contact gauges.dept@vamservices.com.

VAM® 21™ offer:

Soft seal test fixtures (test caps and test plugs) are now available for the VAM® 21™ connections from 4 1/2” up to 13 5/8”.

The soft seal test fixtures are available on different supply basis:

  • Short term rental (on a daily basis).
  • Long term rental (6 month renewable periods).
  • For sale.
  • Maintenance (revamping every 200 cycles and recertification every 3 years).
Test cap / plug | Sizes available:
OD Weight Max Working Pressure (kpsi) with water and gas
4 1/2" 21.5# 15
5" 18# 15
5" 21.4 to 23.2# 15
5 1/2" 17 to 23# 15
5 1/2" 26 to 26.8# 15
6" 30.9# 15
6 5/8" 23.2 to 32# 15
6 5/8" 34.5 & 36.7# 15
7" 23 to 35# 15
7" 38 to 42.7# 15
7 5/8" 29.7 to 39# 15
8 5/8" 44# 15
9 5/8" 47 to 53.5# 15
10 3/4" 51 to 60.7# 15
10 3/4" 65.7# 15
13 5/8" 88.2# 15

Note: Additional sizes will be available soon. Do not hesitate to ask VAM® Services for a size that does not appear in the table.

A printed copy of the User Guide will be provided along with the pressure test fixtures (rental or sale). Should you need a copy or in case of change of revision, please do not hesitate to contact gauges.dept@vamservices.com.

The applicable documents are:

FORVS-507 Rev2 - VAM® 21 Test Plug with Soft Seal - User Guide.

FORVS-508 Rev2 - VAM® 21 Test Cap with Soft Seal - User Guide.

VAM TOP® offer:

Soft seal test fixtures (test caps and test plugs) are now available for the VAM TOP® connections from 2 3/8” up to 9 7/8”.

The soft seal test fixtures are available on different supply basis:

  • Short term rental (on a daily basis).
  • Long term rental (6 month renewable periods).
  • For sale.
  • Maintenance (revamping every 200 cycles and recertification every 3 years).
Test cap / plug | Sizes available:
OD Weight Max Working Pressure with water(kpsi) Max Working Pressure with gas(kpsi)
2 3/8" 4.6 to 5.1# 15 7.5
2 3/8" 5.8 to 7.35# 15 7.5
2 7/8" 6.4# 15 7.5
2 7/8" 7.8 to 10.7# 15 7.5
2 7/8" 11.5# 15 7.5
3 1/2" 6.5 to 10.2# 15 7.5
3 1/2" 12.7 to 14.7# 15 7.5
3 1/2" 15.5 to 18.35# 15 7.5
4" 10.5 to 15.1# 15 7.5
4" 17 to 18.9# 15 7.5
4" 21.5 to 23.7# 15 7.5
4 1/2" 10.5 to 15.1# 15 7.5
4 1/2" 17 to 18.9# 15 7.5
4 1/2" 21.5 to 23.7# 15 7.5
5" 13 to 21.4# 15 7.5
7" 23 to 42.7# 15 7.5
7 5/8" 26.4 to 47.1# 15 7.5
7 3/4" 46.1# 15 7.5
9 5/8" 40 to 58.4# 15 7.5
9 7/8" 62.8 to 70.7# 15 7.5
Note : 15 kpsi = 15,000 psi.