146477015 Pipe Rack Rack Piping

  • View
    227

  • Download
    5

Embed Size (px)

Text of 146477015 Pipe Rack Rack Piping

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    1/23

    0

    PIPE RACK / WAYS

    &

    RACK PIPINGBy,

    Akshaya Sharma

    Associate EngineerPiping Department

    Date 16thNov 2006

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    2/23

    1

    INTRODUCTION

    PIPE RACK Pipe Rack design criteria

    Shapes Future Space Width of Pipe Rack

    Clearance Pipe Rack Loading

    RACK PIPING Positions of Lines (Process & Utilities) Hot Lines & Cold Lines

    Bigger Size Lines Pipe Spacing Anchor Bay Unit Battery Limit Expansion Loops Pipe Route Trays

    Contents

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    3/23

    2

    A pipe rack is the main artery of a process unit. It connects all equipmentwith lines that cannot run through adjacent areas. Because it is located inthe middle of the most plants, the pipe rack must be erected first, before itbecomes obstructed by rows of equipment. Pipe racks carry process, utilitypiping and also include instrument and electrical cable trays as well as

    equipment mounted over all of these.

    The primary data required for detailed development of a pipe rack :-

    Plot Plan

    P&IDs Client Specification

    Construction Materials

    Fire proofing requirements

    Statutory requirements

    INTRODUCTION

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    4/23

    3

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    5/23

    4

    Shapes There are various shapes of pipe rack like L/T/U/H/Z. These shapes

    shall be considered based on the area available.

    Future Space

    The total width of the pipe rack shall include 25% extra space forfuture expansion/modification in unit for rack-width upto 16m and10% for rack-width above 16m. The future space %age is normallybased on the client requirements.

    Width of Pipe rack The width of the rack shall be 6m, 8m or 10m for single bay and 12m,

    16m or 20m for double bay having 4 tiers maximum. The spacingbetween pipe rack portals shall be taken as 6m in general. However itcan be increased to 8m depending on the size of the pumps to behoused below pipe rack.

    PIPE RACK DESIGN CRITERIA

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    6/23

    5

    RACK WIDTH SELECTION CRITERIA

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    7/23

    6

    DIFFERENT SHAPES OF PIPE RACKS

    DEAD END YARD LINES ENTER &

    LEAVE ONE END OF THE RACK

    STRAIGHT THROUGH YARD LINES

    CAN ENTER & LEAVE BOTH ENDS

    OF THE RACK

    L-SHAPED YARD LINES CAN

    ENTER & LEAVE NORTH & EASTOF THE RACK

    T-SHAPED RACK PIPING CAN

    ENTER & LEAVE THREE SIDES OF

    THE RACK

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    8/23

    7

    DIFFERENT SHAPES OF PIPE RACKS

    COMPBINATION OF I & T SHAPEDRACK

    U-SHAPED YARD LINE CAN ENTER& LEAVE ALL FOUR SIDES OF THE

    RACK

    COMPLEX RACK PIPING ARRANGEMENT

    FOR VERY LARGE CHEMICAL PLANT

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    9/23

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    10/23

    9

    Pipe rack loads shall be given by stress group to Civil &

    structural discipline for pipe rack design.

    Sustain Load (Dead Load) Weight of piping, valve and load insulation

    Thermal Laod Load by thermal expansion of piping & Reaction force by

    internal pressure of expansion bellows

    Dynamic Laod Load by vibration of piping & by wind and earthquake

    Sustained Load (Live Load) Liquid load for hydrostatic pressure test

    PIPE RACK LOADING

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    11/23

    10

    Position of Lines

    Predominantly process lines are to be kept at lowertier and, utility & hot process lines on upper tier.

    Hot Lines & Cold Lines

    Generally hot lines & cold lines are to kept atdifferent tiers or at different groups on a tier.

    Pipe Spacing Minimum spacing between adjacent lines shall be decided based

    on O.D. of bigger size flange (minimum rating 300# to beconsidered), O.D. of the smaller pipe, individual insulationthickness and additional 25mm clearance. Even if flange is notappearing the min. spacing shall be based on above basis only.Actual line spacing, especially at L bend and loop locations,shall take care thermal expansion/thermal contraction/non-expansion of adjacent line. Non-expansion/thermal contraction

    may stop the free expansion of the adjacent line at L bendlocation.

    RACK PIPING

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    12/23

    11

    Bigger Size Lines Large size lines (14 and larger) shall be arranged close to the

    column in order to decrease the bending moment of beam. Waterlines more than 30 shall not be routed over pipe rack, these shallbe routed underground.

    Anchor Bay Anchors on the racks are to be provided on the anchor bay if the

    concept of anchor bay is adopted. Otherwise anchor shall bedistributed over two to three consecutive bays.

    Anchors shall be provided within unit on all hot lines leaving theunit.

    Pipe Route Racks shall be designed to give the piping shortest possible run

    and to provide clear head rooms over main walkways, secondarywalkways and platforms.

    RACK PIPING

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    13/23

    12

    Trays Generally top tier is to be kept for Electrical cable trays (if not

    provided in underground trench) and Instrument cable ducts/trays.Cable tray laying to take care of necessary clearances for the fireproofing of structure.

    Battery Limit (ISBL) Process lines crossing units (within units or from unit to mainpipeway) are normally provided with a block valve, spectacle blindand drain valve. Block valves are to be grouped and locations ofblock valves in vertical run of pipe are preffered. If the blockvalves have to be located in an overhead pipe-way, staircase accessto a platform above the lines shall be provided.

    RACK PIPING

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    14/23

    13

    RACK PIPING

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    15/23

    14

    RACK PIPING

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    16/23

    15

    RACK PIPING

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    17/23

    16

    EXPANSION LOOPS

    MAKE LINES INTO A GROUP AND INSTALL A

    LARGE SIZE PIPING AND HIGH TEMPERATURE

    PIPING TO THE EDGE OF THE RACK

    Expansion loop is provided on the high temperature

    lines. This information shall be given by stress group.All the loops shall be located around one column only.

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    18/23

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    19/23

    18

    PIPE RACK DESIGN CRITERIA

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    20/23

    19

    PIPE RACK DESIGN CRITERIA

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    21/23

    20

    PIPE RACK DESIGN CRITERIA

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    22/23

    21

    PIPE RACK DESIGN CRITERIA

  • 8/12/2019 146477015 Pipe Rack Rack Piping

    23/23

    22

    THANK YOU