Post on 06-Mar-2016
description
Inspection of Piping Systems
( In-Service)
API 570 Code
API: American Petroleum Institute Code: Means that it is a mandatory (Jurisdictional requirement) to be followed (in USA & CANADA)Inspection: QC Functions performed by the owners inspector or inspectors delegatesRepair: The work necessary to restore a piping system to a condition suitable for safe operation at the design condition.Alteration: A physical change in any component that has design implications affecting the pressure containing capability or flexibility of a piping system beyond the scope of its design.Rerating: A change in either or both the design temperature or the maximum allowable working pressure of a piping system. A rerating may consist of an increase, a decrease, or a combination of both. Rerating below original design conditions is a means to provide increased corrosion allowance.
Position Measurements
On-Stream: Piping Containing any amount of process fluidOff-Stream: Piping While in Shut-Down ( No process fluid contained in the piping )Reasons For Inspection:The primary purpose of inspection is to identify active deterioration mechanisms & causes of deterioration to specify repair, replacement or future inspections to prevent or retard further damage.
Piping System: An assembly of interconnected piping, subject to the same design
conditions .
Proximity TransducerInspection of Piping Systems
When Could API 570 Be applied??
Objectives of Inspection
What to Inspect For & Where ??Each owner/User should provide specific attention to the need for inspection of piping systems that are susceptible to specific types & area of deterioration.
Areas & Types of Deterioration
Areas & Types of Deterioration
Areas & Types of Deterioration
*Areas of Deterioration
Prepared By: Eng. Osama Elsaadawy * Areas of Deterioration Cont.
Prepared By: Eng. Osama Elsaadawy
*Areas of Deterioration Cont.
*Areas of Deterioration Cont.
*Areas of Deterioration Cont.
When to Inspect ??
*Piping Service Classes Acc. API 570
Piping Service Classes Acc. API 570 Cont.
Piping Service Classes Acc. API 570 Cont.
How to Inspect for Deteriorations ??
Types of Inspection &Surveillance Cont.
*Types of Inspection & Surveillance Cont.
*Notes
For more information about the detailed inspection for piping systems components & deteriorations mechanisms, Ref. to API RP 574 & API RP 579.
Pressure tests not normally conducted as part of a routine inspection, But when conducted this will be after completing a repair, alteration OR rerating.
Recommended Max. Intervals For Inspection
Recommended Max. Intervals For Inspection
Recommended Max. Intervals For Inspection
Inspection Data Evaluation & AnalysisAPI 570 Recognize fitness -For- Service concepts foe Evaluating In-service Degradations .API RP 579 provides general requirements & detailed assessment for specific types of degradation that are referenced in API 570.How To Use The Inspection Findings ??
*Inspection Data Evaluation & Analysis
LTCR (mm) = t initial - t actual Time (years) between them
STCR (mm) = t previous - t actual Time (years) between them
RL (years) = t actual - t required Corrosion Rate (mm)
MAWP = 2SET/D >= Design Pressure
Calculations Of CR, RL & MAWP
*Repair, Alteration & Rerating
Repair, Alteration & Rerating
*ReratingRating: Design Pressure & Temperature Ranges As well As Operating Pressure & temperature
Inspection Of Buried piping Inspection of Buried Process Piping is deferent from other process piping because significant external deterioration can be caused by corrosive soil condition.
Types & Methods of Inspection
Frequency Of Inspection For Buried Piping Without Effective Cathodic protection
Frequency Of Inspection For Buried Piping Without Effective Cathodic protection
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