Tetra Engineering Group, Inc. has assisted the owners of natural gas-fired combined cycle plants with effective remedies to pressure part thermal performance and reliability issues since 1993.  This includes some of the following 'firsts' for Tetra:

1993

First HRSG Assessment

1996

First  Reliability Assessment - Standard HRSG OEM Design

1998

First FAC Assessment for HRSG Tube Failures at Cogen

First High Energy Piping Inspection Plan

1999

First HRSG Two-Shift Cycling Assessment

2000

First HRSG Warranty Inspection

Third Party Review of Alternate TEG Distribution Grids

First HRSG Water Chemistry Training Seminar

2001

1st HRSG Cost of Cycling Assessment

First CCGT High Energy Piping RCFA

First HRSG Purge Time Assessment

First Fuel Gas-Steam Pipe RCFA

2002

1st HP ECON Tube RCFA

First Bowed RH Tube Evaluation

1st Ed., HRSG Tube Failure Diagnostic Guide

 RH Tube RCFA -  Fleet of Standard HRSG Design

Third Party Review of HRSG Harp Weld Quality

HRSG Design Review for Owner

2003

1st Piping Stress Analysis - HRSG RH Piping

Field Support following CRH Waterhammer Event

First CCGT Pipe Support Inspection

1st Ed., HUG O&M Manual

1st 3D Knowledge Management System

2004

1st  Review of Attemeprator Spray Control Logic

First Hot Reheat Drainpot RCFA

First Evaluation of High Energy Steam Drain Capacity

HRSG Baseline - North Africa

PipeVue 1.0 - First KMS for Piping

2005

HRSG and Steam Plant FFS - 10 Year Program

HRSG T23 Failure and Weld Quality

First Vertical Gas Path HRSG Tube RCFA

First Cost of Cycling Assessment

1st Ed., HRSG Inspection Planning Guide

2006

1st Evaluation - Changed Main Steam Temperature

First HRSG RCFA Projects - Various Clients in Mexico

HRSG Component Reliability Database

1st HRSG EOH Assessment

2007

1st NFPA 85 Improved Purge Time Evaluation

Third Party RCFA - Need for Chemical Cleaning

First Grade 91 Inspection Plan & Field Inspections

Engineering Review of Replacement Deaerator Design

2008

HRSG Thermal Design Tool: PPSD - Various Projects

Design and Installation of Improved RH Header Restraint

First Onsite Water Treatment Program Upgrade

First HRSG Hot Spot Warranty Project - Ireland

2009

1st FFS for Bulged CRH Piping Damage 

Field Support - Main Steam Stop Valve Damage

First ACC Inspection and Thermal Performance Evaluation

First LP ECON Header RCFA - Middle East

2010

1st CPS Piping Program - New ASME Requirements

First Deaerator Inspection and Condition Assessment

First FFS for Localized Thinning of FW Piping

First Casing Hot Spot Repair with Pumpable Insulation

2011

1st ACC Inspection and Condition Assessment

Thermal Evaluation of RH Lower Link to Manifold Cracking

Seawater Contamination during Commissioning - Middle East

P91 Hot Reheat Lateral Inspection and RCFA

2012

1st CFD Analysis of Perforated Plate in HRSG Duct

Third Party Engineering Review of OEM Re-Design of LP Evaporator

HRSG Damage and Remaining Life following Seawater Contamination

2013

1st HRSG Warranty Inspection - Peru

Long Term Third Party Witness - Offshore HRSG Fabrication

1st P91 Risk Assessment & Inspection Plan - IWPP Plant

2014

1st Benson Boiler HRSG Warranty Inspections

HRSG Outlet Manifold Creep-Fatigue RCFA

Main Steam Piping RCFA

PipeVue 2.0 - Released for Various Projects

Thermal Modeling - Prudhoe Bay Glycol Heating System

HRSG Vibration Study - Belgium

Tetra Engineering Middle East Opened - Dubai, UAE

2015

1st Fleet-Wide HRSG Health Check Assessment

Survey of Industry 'Rust' Release Experiences after Startup

Engineering Design and Purchase Spec. for Alteration to HRH Lateral

1st UT Linear Phased Array Inspection in Mexico

2016

3rd Edition, HRSG Tube Failure Diagnostic Guide

HRSG Beyond Design Lifetime Condition Assessment

Stress Analysis and Site Support  for Alteration of HRH Lateral

NFPA-85 Purge Compliance after Alteration - SCGT

Duct Burner RCFA

2017

1st CPS Piping Program - Canada

Engineering Study of HRSG Pre-Heat System for CO Emissions Control

First Condition Assessment for Once-Through SG - LM6000 Plant

Engineering Spec. for HRH Attemperator Upgrade

2018

First Fleet-Wide CPS (High Energy) Piping Program

15 Year Re-Evaluation of HRSG Cycling Assessment

.....

Our thanks to our clients for their patronage over all these years.  

Peter S. Jackson, P.E.PresidentTETRA ENGINEERING GROUP, INC.+1 (860) 651-4622  James W. MalloyPrincipal EngineerTetra Engineering Europe+33 (0)4 92 96 92 54