Prepared by: Prakash KothakondaCivil Structural

Jan 2013

Prepared by: Prakash KothakondaCivil Structural

Jan 2013

What is a Piperack

Presentation Outline

Purpose of Presentation

Types of Piperack Systems

Construction Materials

Details of Continuous Piperack System

Training Module2

Purpose of Presentation

To know what is a Piperack mean

To understand various components of Piperacks for

Modeling in PDS etc.,

How to read the Structural Steel Section / Shape

Dimensions and Sizes for the shapes which are used in

Piperack structure for Modeling

Training Module3

A sample Piperack 3D view

Training Module4

Types of Piperack Systems

Two basic types of structural Piperack systems

Continuous Piperack system

A number of 2D frames or bents spaced typically at 20

tied together in the longitudinal direction with struts and vertical

bracing to form a 3D space frame arrangement.

Non continuous Piperack system (Goal Post type)

Independent freestanding cantilevered 2D frames and anchor bays.

May be utilized for long uniform runs of product lines, flare or

tank farm piping usually outside battery limit. Frame spacing may be

increased up to 40 ft (12m).

Training Module5

Types of Piperack Systems

Continuous Piperack system EXAMPLE:

Training Module6

TRANSVERSE

BEAMSTRANSVERSE

BEAMSTRANSVERSE

BEAMS

LONGITUDINAL

BEAM STRUTS

COLUMNS

LONGITUDINAL

BEAM STRUTS

COLUMNS

PRECAST

CONCRETE

FRAME

TRANSVERSE ELEVATION

Types of Piperack Systems

Continuous Piperack system EXAMPLE

Training Module7

LONGITUDINAL

BEAM STRUTS

BENTS BRACED

BAY

VERTICAL BRACING

Types of Piperack Systems

Non-Continuous Piperack system EXAMPLE

Training Module8

COLUMN

COLUMN

Types of Piperack Systems

Non-Continuous Piperack system EXAMPLE

Training Module9

COLUMNS

Non-Continuous Piperacks are not common in use

(except for Flare Lines & Tank Farm Pipelines)

Construction Material

Steel

Concrete

(But generally Steel is widely

used Material for Piperacks)

Training Module10

Design Coordination

The following should be coordinated by Civil with the

Plant Design, Electrical, and Control Systems groups

before the start of detailed design:

Bent Spacing. Normally 20 for economical design.

Elevations of support levels.

Elevation of the longitudinal struts.

Locations of vertical bracings and braced bays.

Should be away from pumps and other equipment at

grade level.

Minimum Clearance required by applicable codes or

for maintenance purpose.

Training Module11

Continuous Piperack System COMPONENTS

Training Module12

Frames (Bents)

Transverse Beams

Longitudinal Beam Struts

Vertical Bracing

Frames

Training Module13

Piperack consists of Bents (or) Frames see attached sample

These Frames (or) Bents are generally spaced at 20 for economical

design

KNEE

BRACE

COLUMNS

TRANSVERSE

BEAMS

Transverse Beams

Training Module14

Transverse Beams are Main Members (beams) which are directly

supporting the Pipes & Cable Trays TRANSVERSE BEAMS

Longitudinal Beam Struts Longitudinal Beam Struts are side beams tied between to bents or

frames along the Piperack. These are required to transfer the

longitudinal pipe forces along the Piperack.

In the longitudinal direction there should be at least one

continuous level of beam struts on each side to carry the

longitudinal forces transmitted through the beam struts to the

base plate and foundation levels.

Training Module15

BENTS (OR)

FRAMESLONGITUDINAL

BEAM STRUTS

Vertical Bracing

Vertical bracing is used to transmit the longitudinal forces from

the beam struts to the foundations. Knee-bracing or K-bracing is

most often used for this purpose.

Training Module16

VERTICAL BRACING

BENTS (OR)

FRAMES

LONGITUDINAL

BEAM STRUTS

Piperack Example

Training Module17

PIPES ARE LAYED IN

VARIOUS LEVELS

Structural Steel Shapes commonly used

Training Module18

HP

SHAPES

W

SHAPES

MC & C

CHANNELS

WT TEES

(OR) CUT

FROM W

SHAPES

ANGLESEQUAL LEGS

(OR) UNEQUAL

LEGS

Structural Steel Shapes & their sizes

Training Module19

Structural Steel Shapes & their sizes

Training Module20

Structural Steel Shapes & their sizes

Training Module21

Structural Steel Shapes & their sizes

Training Module22

Structural Steel Shapes & their sizes

Training Module23

Pipe Bridge Example

Training Module24

Question?

Training Module25