Tuesday, March 17, 2015

ASME B31.3 Process Piping Inspection, Examination and Testing

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ASME B31.3 Process Piping Inspection, Examination and Testing

  • Inspection
  • Examination
  • Methods
  • Requirements
  • Acceptance Criteria
  • Leak Testing
  • Methods
  • Requirements

Inspection

The owner’s inspector:
  • Verifies that all required examinations and testing have been completed
  • Has access to any place where work is being performed
  • Must be independent of organizations performing fabrication, examination, installation or testing
  • Must have 10 years experience or 5 years experience plus an engineering degree

Examination

Examination applies to quality control functions performed by the manufacturer (for components only), fabricator, or erector. Reference in this Code to an examiner is to a person who performs quality control examinations.

The examiner:

  • Examines piping in accordance with Code requirements
  • Examines piping is accordance with additional requirements described in the engineering design
  • Prepares suitable examination records for use by the inspector
  • Shall have training and experience commensurate with the needs of the specified examinations
Examination is performed in order to assure that:
  • Components conform to the specifications for
• Material of construction
• Design
• Freedom from defects
Piping is installed with the proper
• Support
• Alignment
• Joint assembly
Discontinuities are sufficiently small that they don’t grow into leaks during operation


Examination Methods

Examination methods include
  • Visual (VT)
  • Positive Material Identification (PMI)
  • Liquid Dye Penetrant (PT)
  • Magnetic Particle (MT)
  • Radiography (RT)
  • Ultrasonic (UT)
  • In-Process
FOR MORE INFO, SEE THE EMBEDDED PDF. GIVE IT A MINUTE TO LOAD.

ASME B31.3 Process Piping Fabrication and Installation

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ASME B31.3 Process Piping Fabrication and Installation

Fabrication and Installation

  • Welder/Brazer Qualification
  • Welding Processes
  • Weld Preparation
  • Typical Welds
  • Preheating & Heat Treatment
  • Typical Owner Added Requirements
  • Installation
  • Flange Joints

Welder Qualification

Welders are required to use an approved procedure in accordance with B&PV Code Section IX
  • Prepare the welding procedure specification (WPS)
  • Essential variables (P-no., thickness, PWHT, etc.)
  • Nonessential variables (Groove design, position, technique, etc)
  • Procedure Qualification Test – to determine that weldment is capable of having required properties.
  • Test of procedure, not welder (normally done by good welders)
  • Must pass tensile test and bend test
  • May be required to pass supplemental tests (e.g. impact)
  • The test record is documented as Procedure Qualification Record (PQR), which is retained by the employer
  • Performance Qualifications Test – to determine that the welder is capable of depositing sound weld metal
  • Additional essential variables, e.g. position, pipe diameter 
  • The test record is documented as Welder Performance Qualification (WPQ), which is retained by the employer
  • Need to weld with manual (or automatic) process periodically, if not for 6 months, re-qualification required (could be on production weld that is X Rayed)
  • Procedure and performance qualifications may be by other than the employer under certain conditions if the inspector approves.

Welding Processes – Electric Arc

  • Shielded Metal Arc Welding (SMAW), a.k.a. stick welding
  • Gas Metal Arc Welding (GMAW), a.k.a. MIG
  • Flux Cored Arc Welding (FCAW)
  • Gas Tungsten Arc Welding (GTAW), a.k.a. TIG

Shielded Metal Arc Welding

  • Suitable for windy, outdoor conditions
  • Low cost equipment
  • All position capabilities
  • Good choice for on-site welding

Gas Metal Arc Welding

  • Not suitable for windy, outdoor conditions
  • Moderate cost equipment
  • All position capabilities
  • Fast welding speeds possible
  • No slag to clean

Flux Cored Arc Welding

  • Suitable for windy, outdoor conditions
  • Same equipment as for GMAW
  • Out of position capabilities
  • High metal deposition rate

Gas Tungsten Arc Welding

  • Not suitable for windy, outdoor conditions
  • Moderate cost equipment
  • All position capabilities
  • Low metal deposition rate
  • No slag to clean
  • Highest quality, most precise welds
FOR MORE INFO, SEE THE EMBEDDED PDF. GIVE IT A MINUTE TO LOAD.

Friday, March 13, 2015

New Commands on AutoCad/AutoPlant for Managing Layers Effectively (Can be Customized)

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I have created 3 lisps files compatible on AutoCad / Autoplant or supported autodesk software's which has autocad as base software. These lisps files shall helps you in giving commands, which ultimately help you in switching Layers in a drawing/3D model. 



These commands are just a shortcuts in doing things like Switching Layers ON, OFF, LOCK and UNLOCK. These all things, users must be doing using LA commands and then searching for layers n all. This if totaled, is a time consuming process. Hence, i have tried to minimize these tasks through very simple commands. 

Monday, March 2, 2015

Complete Piping Training Course Presentation Download (Updated)

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Complete Piping Training Course Presentation Download

Piping components: summary

Definition
Piping component
Piping drawing
Design
Pipe work
Codes & Standards

Definitions: 

piping:

assemblies of piping components used…[for] fluid flows. Piping also includes pipe supporting elements, but does not include support structures…or equipment…

piping system:

interconnected piping subject to the same design conditions

piping components: 

mechanical elements suitable for joining or assembly into pressure tight fluid-containing piping systems include

piping components includes: 

  • Pipe & tube
  • Fittings (e.g. elbows, reducers, branch, connections, flanges, etc.)
  • gaskets, bolting
  • valves
  • Pipe support
  • Special items such as expansion joints…

Piping components: pipe & tube classification

Pipe classification:

  • Iron pipe size (approximate internal dia.)
  • Manufacturers’ weight: NPS +
  • STD
  • XS
  • XXS
  • Schedule number: NPS +
  • 5, 5s, 10, 10s, 20, 20s, 30, 40, 40s, 60, 80, 80s, 100, 120, 140, 160                           
  • SCH ≈ 1000 P/S
  • NPS ≤ 12, OD ≥ NPS
  • NPS ≥ 14, OD = NPS
  • NPS ≤ 10, SCH 40 = STD
  • NPS ≤ 8, SCH 80 = XS
  • Light wall = light gage = 5, 5s, 10, 10s
  • API designation
  • A25, A, B, X42, X46, X52, X60, X65, X70
  • X(AA), AA = Allowable stress
  • Pressure-Temperature Ratings
  • 150, 300, 400, 600, 900, 1500, 2500

Pipe:

  • NPS:
  • 1/8”, ¼”, 3/8”, ½”, ¾”, 1”, 1 ½”, 2”, 3”, 4”, 6”, 8”, 10”, 12”, 14”, 16”, 18”, 20”, 24”, 28”, 30”, 32”, 36”, 40”, 44”, 48” 52”, 56”, 60”
  • NPS 1 ¼”, 2 ½”, 3 ½”, 5” not used
  • Pipe is supplied in 
  • Random length (17 to 25 ft)
  • Double random length (38 to 48 ft)
  • Pipe end:
  • BE (bevel end)
  • PE (plain end)
  • T and C (treaded and coupled, rating of coupling shall be specified)

Tube:

  • Specify by two of
  • Outside diameter
  • Inside diameter
  • Wall thickness:
  • Thousandths of inch
  • Gauge number
      • American wire gauge
      • Steel wire gauge
      • Birmingham wire gauge
When gauge numbers are given without reference to a system (BWG) is implied.

Piping components: pipe standards

  • ASTM A53 – Steel Pipe
  • ASTM A312 – Stainless Steel Pipe
  • AWWA C151 – Ductile Iron Pipe
  • API 5L – Line pipes
  • ISO 11960, API 5CT – tubing
  • ASTM A 53/A 53М Electric-weldedand seamless steel pipes, black or hot-dip galvanized 
  • ASTM A 106 Seamless carbon steel pipes for high temperature performance 
FOR COMPLETE TRAINING COURSE, CHECK OUT FOLLOWING PRESENTATION:

Handbook on Plumbing Installation for Buildings

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Handbook on Plumbing Installation for Buildings

Contents:

Contents Page No.
1. general
1.1 definitions
1.2 abbreviations
1.3 commonly used waterworks pipes and fittings
2. responsibilities of water authority and consumers/agents
2.1 divisions of responsibilities
2.2 obligations of consumers/agents
2.3 general principles for installing plumbing works
3. submissions of plumbing proposals
3.1 general
3.2 submissions
3.3 plumbing proposals
3.4 format
4. licensed plumbers
4.1general
4.2 commencement of work
4.3 interim inspections and final inspections
4.4 completion of work
4.5 works of a minor nature
5. metering
5.1 general
5.2 meter position
5.3 master meter
5.4 check meter
6. inside service
6.1 fresh water supply
6.2 flushing supply
7. fire service
7.1 metering requirement
7.2 pipe materials
7.3 supply types and arrangements
8. storage cisterns ,water pumps and other miscellaneous
8.1 storage cisterns (or water tanks)
8.2 water pumps
8.3 valves and taps
8.4 earthing
8.5 separate metering in existing premises
8.6 authorizing private developers/authorized persons to undertake water supply connection works
9. maintenance

Appendix A1: checklist for vetting plumbing proposals

Appendix A2: common mistakes by practitioners

Please give it a minute to load.

Thursday, February 26, 2015

ASME B31.3 Process Piping - Designing with Expansion Joints

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ASME B31.3 Process Piping - Designing with Expansion Joints

Designing with Expansion Joints

  • Types of Expansion Joints
  • Pressure Thrust
  • Installation of Expansion Joints
  • Metal Bellows Expansion Joints

Monday, February 23, 2015

ASME B31.3 Process Piping - Reactions

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ASME B31.3 Process Piping - Reactions

  • General Considerations
  • Fabricated Equipment
  • Rotating Equipment
  • Supports
  • Cold Spring

General Considerations

  • Main purpose is to provide sufficient support and flexibility to prevent the piping from exerting excessive reactions on equipment and restraints
  • The calculation methods are different for fabricated equipment than for rotating equipment or supports
  • Reaction limits are determined differently for fabricated equipment than for rotating equipment or supports

Fabricated Equipment

  • Calculation Methods
  • Reaction Limits
  • Nozzle Flexibility

Calculation Methods

  • Usually the accuracy of a formal analysis using a computer stress analysis program is required
  • Both sustained loads and displacement loads are considered
  • Failure modes for fabricated equipment include:
  • Gross deformation or collapse
  • Fatigue
  • In order to evaluate fatigue, the entire range of loads must be considered, so the temperature range for this calculation is the same as for calculating the displacement stress range
FOR MORE INFO, SEE THE EMBEDDED PDF. GIVE IT A MINUTE TO LOAD.


ASME B31.3 Process Piping - Flexibility and Stress

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ASME B31.3 Process Piping - Flexibility and Stress

  • General Considerations
  • Friction
  • Stress Intensification
  • Thermal Expansion
  • Spring Hangers
  • The Displacement Load Analysis

General Considerations

  • Main purpose is to provide sufficient flexibility to safely accommodate changes in length resulting from temperature variations, avoiding failure caused by
  • Fatigue
  • Creep-fatigue
  • Ratchet
  • Another purpose is to keep movement of piping within a manageable range
  • Avoiding interference with other stuff
  • Supports designed to handle displacements

General Considerations

  • Loads are actions that cause one end of a pipe segment to move relative to the other end and actions that have an equivalent effect
  • Thermal expansion of attached equipment
  • Temperature changes in the piping
  • Peak stresses are accounted for using stress intensification factors
  • Acceptance criterion is based on the stress range

Friction

  • Displacement causes piping to move over sliding supports
  • Friction forces are in one direction when the pipe is heating and in the opposite direction when cooling
  • The coefficient of friction used for steel on steel ranges from 0.3 to 0.5.
FOR MORE INFO, SEE THE EMBEDDED PDF. GIVE IT A MINUTE TO LOAD.

Monday, February 16, 2015

ASME B31.3 Process Piping - Layout and Support

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ASME B31.3 Process Piping - Layout and Support

General Considerations
  • Access for operation (valves)
  • Access for maintenance of in-line devices
  • instrumentation
  • Traps
  • strainers, etc.
  • Avoiding interference with other activities
  • Removing heat exchanger bundles
  • Clearance for pump maintenance, etc.
  • Appearance
  • Drainage (slope) requirements
  • Pressure drop
  • Cost of piping, including maximizing use of existing supports
  • Avoiding interference with other piping
  • Clearance for application of insulation
  • Clearance for piping displacement, etc.
  • Provisions for future additions

Support Spacing

Two principal sources:

1. Recognized codes & standards
  • ASME B31.1
  • MSS SP-69: Pipe Hangers and Supports – Selection and Application
2. Owner or designer calculated values

Usually based on simplifying assumptions

  • Combination of pipe material and wall thickness used in the facility that gives the shortest spans
  • Contents specific gravity, usually 1.0
  • Typical insulation thickness and density
  • Person walking on pipe for larger sizes
FOR MORE INFO, SEE THE EMBEDDED PDF. GIVE IT A MINUTE TO LOAD.


Friday, February 13, 2015

ASME B31.3 Process Piping - Perform flexibility Analysis

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ASME B31.3 Process Piping - Perform flexibility Analysis

What are we trying to achieve?

1. Provide adequate support to resist loads suc h as pressure, weight, earthquake and wind

2. Provide sufficient flexibility to safely accommodate changes in length resulting from temperature variations

3. Provide sufficient support and flexibility to prevent the piping from exerting excessive reactions on equipment and restraints

And we do that in order to
  • make the piping look well supported to the facility engineers and operators
  • prevent collapse of the piping
  • prevent leaks due to fatigue cracks
  • prevent joint leakage caused by excessive forces , and
  • prevent failure or malfunction of attached equipment caused by excessive reactions

Flexibility Analysis Example

A two step analysis is shown.
1. Weight and Pressure Loads – verify proper support and check reactions
2. Thermal Expansion Load – verify adequate flexibility and check reactions

FOR MORE INFO, SEE THE EMBEDDED PDF. GIVE IT A MINUTE TO LOAD.

 

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