Copyright © 2007 Fluor Corporation

Buttweld Fittings

Lesson Objectives:

Lesson Objectives

Definition:

What are fittings used for?What is buttwelded?

General Types Of BW Fittings:

•Elbows

•Tees

•Reducers

•Weld Cap

90 Degree Buttwelded Elbow

Long Radius 90 Degree Elbow

D = Diameter Of Pipe (Use Nominal Pipe Size)

Example:12” 90 Degree Elbow:

D = 12”1 ½ D = Radius (or Center To End)1 ½ X 12” = 18”

Long Radius 90 Degree Elbow (BW)

Single Line

Double Line

Piping PlanPiping Isometric

Reference: Practice 000.250.9818 Pg. 3

Short Radius 90 Degree ELBOW

D = Diameter Of Pipe (Use Nominal Pipe Size)

Example:12” 90 Degree Elbow:

D = 12”1 D = Radius (or Center To End)1 X 12” = 12”

Short Radius 90 Degree Elbow (BW)

Piping Plan

Single Line

Double Line

Piping Isometric

Reference: Practice 000.250.9818 Pg. 3

90 Degree REDUCING ELBOW

D = Diameter Of Pipe (Use Nominal Pipe Size)

Example:12” 90 Degree ELBOW:

D = 12”1 ½ D = Radius (or Center To End)1 ½ X 12” = 18”

Note: Reducing elbow is only

made in long radius.

90 Degree REDUCING ELBOW (buttweld)

Piping Plan

Piping Isometric

Single Line

Double Line

Reference: Practice 000.250.9818

Exercise PI-E3A

45 Degree Buttwelded Elbow

45 degree Elbow(Long Radius Only)

* For dimension see Dimensional Chart or Catalog.

45 Degree Elbow (BW)

Piping Plan

Single Line

Double Line

Piping Isometric

Call Out 45° Offset On Iso

REFERENCE: Practice # 670.250.9818

Reference: Practice 000.250.9818 Pg. 3

45 Degree Welds & Cuts

Double Line

Single Line

*Count the welds

Fitting Make-Up

Fitting Make-up Examples:

Piping Plan

Single Line

Piping Isometric

Double Line

Exercise PI-E3B

Buttwelded Tees

Straight Tee

All Three Openings Are The Same Size

Weld Tee

Reference: Practice 000.250.9818 Pg. 11

Reducing Tee

The Branch Connection Is Smaller Than The Run

Taylor Forge Dimension Chart

Reference:

Practice 000.250.9818 Pg. 11

Reducing Tee

Stub-In Connection

Stub-in Connection

Stub-in

Reference:

Practice 000.250.9818 Pg. 9

* 3” Minimum between weld (preferred)

Stub-in

Exercise PI-E3C

Buttwelded Reducer

Concentric Reducer

Common centerline

Eccentric Reducer

Use when A common bop (Bottom

Of Pipe) is required

Eccentric Reducer (Calculating The Offset Dimension)

Offset dimension:Half the difference

of the outside diameters

(Actual pipe size)

Example: 12” X 6” ECC RED

12” = 12 3/ 4’’

6” = 6 5/ 8’’

6 1/ 8’’

(1/ 2) (6 1/ 8’’) = 3 1/ 16’’ Offset dimension

Nominal OD Actual OD

Reducers

Reference:

Practice 000.250.9818 Pg. 7

Exercise PI-E3D

Weld Cap

Weld Cap

Exercise PI-E3E

90 Degree Miter

90 Degree Miter

Note: Use three weld miter when required by space limitations

or when required by process engineering for flow conditions.

90 Degree Miter

Piping Plan

Piping IsometricSingle Line

Double Line

Reference: Practice 000.250.9818 Pg. 6

45 Degree Miter

45 Degree Miter

45 Degree Miter

Piping Plan

Single Line

Double Line

Piping Isometric

Reference: Practice 000.250.9818 Pg. 6

45°& 90°Miter Combinations

Piping Plan

Single Line

Piping Isometric

Double Line

Exercise PI-E3F

Exercise PI-E3G

Questions??

Open Book Test PI-T3