Control Techniques SP0403 Redundant Power Supply Module

Control Techniques SP0403 Redundant Power Supply Module

This standard practice establishes guidelines to avoid caustic SCC of equipment and piping. It addresses applications that use "fresh" caustic.

In some services that involve contaminated caustic, SCC has been observed at conditions within area "A" of the Caustic Service Chart shown in Figure 1 (particularly when contaminated with sulfide compounds). The need for thermal stress relief should be considered when the service contains contaminated caustic.

The practices detailed below are specifically intended for handling aqueous solutions containing sodium hydroxide (NaOH). However, several companies extend these practices to include aqueous solutions of other strong alkali compounds such as potassium hydroxide (KOH) and lithium hydroxide (LiOH). Although amines form a high pH solution and may cause SCC, it is considered a different mechanism for the purposes of this standard and amine SCC is not addressed. A good reference on amine SCC is API(1) 945.3 Carbonate SCC is another "different" SCC mechanism occurring at high pH, which is not included in the scope of this standard. It is covered by NACE Publication 34108.4

Some proprietary caustic solutions are used in the industry, e.g., potassium carbonate/bicarbonate solutions for carbon dioxide removal in hydrogen manufacturing units. Some of these systems rely on postweld heat treatment (PWHT) to avoid SCC. These systems are outside the scope of this standard.

Other terms for caustic SCC used in past literature include caustic embrittlement, caustic cracking, and alkaline cracking.

(1) American Petroleum Institute (API), 1220 L St. NW, Washington, DC 20005-4070.

Special Features

EMERSON DeltaV KJ1501X1-BA2 System Power Supply(AC/DC)
EMERSON DeltaV KJ1501X1-BB1 System Passthrough Power Supply 12/12VDC(DC/DC)
EMERSON DeltaV KJ1501X1-BC1 System Dual DC Power Supply (DC/DC)
EMERSON DeltaV KJ1501X1-BC2 System Dual DC Power Supply 24/12VDC(DC/DC)
EMERSON DeltaV KJ1501X1-BC3 System Dual DC Power Supply(DC/DC)
EMERSON DeltaV KJ1501X1-BK1 Controller
EMERSON DeltaV KJ1502X1-BA2 BULK AC TO 24 VDC POWER SUPPLY
EMERSON DeltaV KJ1611X1-EF1 Controller MODULE
EMERSON DeltaV KJ1700X1-BA1 Media Converter
EMERSON DeltaV KJ1710X1-BA1 Single Port Fiber Switch
EMERSON DeltaV KJ1740X1-BA1 Four Port Fiber Switch
EMERSON DeltaV KJ2001X1-BA1 M2 Controller
EMERSON DeltaV KJ2002X1-BA1 M3 Controller

Similar Products

Similer item we can supply:

Advantage Products:

【Yaskawa】Servo Drive / Servo Motor

【Mitsubishi】Servo Drive / Servo Motor

【Honeywell】Module DCS / PLC

【Emerson】DeltaV Module / Servo Motor

【ABB】Input Output Module

【AB】Module / Touch Screen

【Rosemount】Pressure and Temperature Transmitter

【Yokogawa】Pressure Transmitter

【GE】IC69 Series PLC/ Fanuc Servo Motor and Drive

Wisdomlong Technology CO.,LTD

Key Features: * Includes replacement components essential for reliable boiler operation * Meets manufacturer's recommended maintenance schedule * Ensures optimal efficiency and performance * Prevents unexpected breakdowns and costly repairs