Tuesday, January 26, 2010

Material Class API-6A

AA-General Service
Carbon or low alloy steel

BB-General Service
Carbon or low alloy steel

CC-General Service
Stainless steel

DD-Sour Service a
Carbon or low alloy steel b

EE-Sour Service a
Carbon or low alloy steel b

FF-Sour Service a
Stainless steel b

HH-Sour Service a
CRA bcd

a) As defined by NACE Standard
MR0175 / ISO 15156.

b) In compliance with NACE Standard
MR0175 / ISO 15156.

c) CRA required on retained fluid wetted surfaces only; CRA cladding of low allow or stainless steel permitted.

d) CRA as defined in API 6A latest edition. NACE MR0175 / ISO 15156 definition of CRA does not apply.

For more information, please see www.petrotrim.com

Wednesday, January 20, 2010

Petrotrim Services, API-6A Temperature Range, Ref. Only

Temperature Operating Range, Classification Degrees Fahrenheit °F

Minimum Temperature is the lowest temperature that the equipment may experience.

Maximum Temperature is the highest temperature that the equipment may experience.

Min. Max.
K -75 to 180
L -50 to 180
N -50 to 140 (Added to API-6A 19th Ed.)
P -20 to 180

R Room Temperature

S 0 to 140
T 0 to 180
U 0 to 250
V 35 to 250
X 0 to 350 **
Y 0 to 650 **

** May Require Derating.
See our website for more information, www.petrotrim.com

Friday, January 15, 2010

Petrotrim Services provides the "NEW" style Body Bushing. Some other companies provide the "OLD" style Body Bushing. Below is the difference between the two different styles, NEW vs. OLD.

The new Body Bushing is designed to overcome the following problems.

1) Eliminate pressure trapping in the valve cavity when the gate is either fully open or closed.

2) Eliminate the tendency for the Seat Ring and Body Bushing to seal on the pressure side of the gate. (Upstream sealing). This effect increases the force to move the gate.

In most cases the Teflon Seal Ring is the same one used on the Stellite Seat Ring.

Please see our website for more information.