ADJUSTABLE PIPE ROLLER HANGER

P.O. Box 540 Westtown, PA 19395 Phone 610-696-9220 Fax 610-344-7519 email

LINN BROWN AND ASSOCIATES, INC. (LB&A) manufactures and supplies a variety of Non-Conductive Pipe Rollers,  Pipe Hangers, Pipeline Bridge Crossing Products and Supports.  
Please contact us to place an order or if you would like to receive our free catalog.

LIST OF ALL PRODUCTS

ADJUSTABLE  ROLLER HANGER (4B)

TABLE OF DIMENSIONS

COLOR DRAWINGS WITH USE RECOMMENDATIONS

Adjustable Roller Hanger Includes:

  • 1 Steel Clevis

  • 1 Roll Axle and Nuts

Rollers are NOT Included

ADJUSTABLE  ROLLER HANGER (4B)

TABLE OF DIMENSIONS

Measurements in inches unless otherwise noted.

PIPE SIZE

ROD SIZE

ROD TAKE OUT

AXLE

STEEL SIZE

ADJUST.

MAX LOAD LBS.

WT. LBS/EA.

A

B

C

D

E

F

G

H

2 3/8 3 1/4 3/8

3

1/2

6 3/8

3 7/8

2 1/4

3 1/8

1/2

3/16 X 1 1/4

1 5/8

310

2.2

4

5/8

7 9/16

4 15/16

2 13/16

3 5/8

1/2

1/4 X 1 1/2

1 5/8

475

3.2

5

5/8

9 1/8

6

3 7/16

4 1/2

5/8

3/8 X 1 3/4

1 15/16

685

6.3

6

3/4

10 5/16

7 1/8

4

5

3/4

3/8 X 2

1 7/8

780

9.3

8

7/8

12 11/16

9 1/4

5 1/8

6 1/8

7/8

3/8 X 2 1/2

2

780

14.5

10

7/8

15 1/16

11 1/4

6 3/8

7 1/4

7/8

3/8 X 2 1/2

2 1/16

965

18.8

12

7/8

17 7/16

13 1/4

7 7/16

8 3/8

1

1/2 X 2 1/2

2 1/4

1200

27.7

14

1

18 7/8

14 1/2

8 3/8

8 3/4

1 1/8

1/2 2 1/2

2

1200

39.1

16

1

20 13/16

16 1/2

9 3/8

9 11/16

1 1/4

1/2 X 2 1/2

1 15/16

1200

49.1

18

1

23 3/4

18 1/2

10 7/16

11 7/16

1 1/4

1/2 X 3

2 13/16

1400

57.8

20

1 1/4

26

20 1/2

11 5/8

12 1/4

1 1/4

5/8 X 3

2 1/2

1600

75.9

ADJUSTABLE ROLLER HANGER (4B)

DRAWINGS AND RECOMMENDATIONS

PAINTED OR BARE STEEL PIPE

RECOMMENDATION:

  • NON-CONDUCTIVE PIPE ROLLER

Non-Conductive Rollers should be used in lieu of, or as a direct replacement for, cast iron rolls on any bridge main installation that is, or is going to be, painted. This applies for both existing and new mains. Most paints provide only a thin barrier and are extremely susceptible to abrasion damage. This is particularly true at each pipe to support contact.

REASONS:

  • ELIMINATES THE POSSIBILITY OF MOISTURE ENTRAPMENT.

  • ROLLER WILL NOT BIND OR ABRADE THE PAINT.

  • MAINTAINS ELECTRICAL ISOLATION.

The polyurethane based Non-Conductive Rollers are best used alone with thin coatings because they are non-abrasive and maintain a minimum surface contact. This eliminates any possibility of moisture collecting between pipe and support. In addition, the Non-Conductive Rollers are solid and do not have the same tendency to bind as the hollow cast iron rolls. Lubricating the rollerís stainless steel sleeve prior to inserting the axle seals out moisture and reduces friction.

When a pipe has a thin barrier coating the use of a FRP Shield increases the possibility of moisture entrapment between the pipe and shield interface. In most cases this would aggravate any corrosive conditions located between the pipe and FRP Shield.

TAPE COATED PIPE WITH CAST IRON ROLLER

RECOMMENDATION:

  • FRP TYPE # 240 SHIELD

A Type# 240 Shield needs to be installed with any factory or field applied tape. This is particularly important when cast iron rolls are used. The profile of cast iron rolls do not accommodate thick barrier coatings. The tapes change the OD of the pipe to the point it will no longer rest in the cradle of the roll as is the case with bare or painted pipes. Instead, the pipe will rest on the peaks of the roll. This situation aggravates the point loading that normally occurs at each of the pipeís supports.

REASONS:

  • PROTECTS THE TAPE FROM ABRASION.

  • PREVENTS COLD FLOW OF THE TAPE.

  • ENSURES ELECTRICAL ISOLATION.

Tape wraps are thick barrier coating that must be protected at each support. Without protection the tape will cold flow as a result of being sandwiched between the pipe and its support. Abrasion due to even minor thermal expansion and contraction will further compromise the integrity of the tape. Fiberglass reinforcement enables the FRP Shields to tolerate the point loading and prevent abrasion damage by providing a desirable weight distribution. The FRP Shields also ensure a high degree of electrical isolation. Unlike non-reinforced plastics, the Fiberglass Reinforced Shields do not get brittle in the cold and are resistant to UV degradation.

TAPE COATED PIPE WITH NON-CONDUCTIVE ROLLER

RECOMMENDATION:

  • FRP TYPE # 240 SHIELD & NON-CONDUCTIVE ROLLER

A Type# 240 Shield needs to be installed with any factory or field applied tape. This is the case even when Non-Conductive Rollers are used. The profile of a urethane roller is designed to accommodate both the tape wrap and FRP Shield. Although the Non-Conductive Rollers greatly reduce the possibility of abrasion, the tape must still be protected from cold flow damage. FRP Shields prevent damage by providing the necessary weight distribution between the pipe and its support. This is particularly important if the pipe becomes misaligned.

REASONS:

  • PROTECTS THE TAPE FROM ABRASION.

  • PREVENTS COLD FLOW OF THE TAPE.

  • ENSURES ELECTRICAL ISOLATION.

When used together, the Non-Conductive Rollers and FRP Shields provide the best possible protection for any tape type wrap. Unlike hollow cast iron rolls, the Non-Conductive Rollers are solid and do not tend to bind and will not corrode internally. The urethane composition stays flexible even in cold temperatures. This provides a degree of vibration tolerance which one of the primary causes for alignment problems. Lubricating the rollerís stainless steel sleeve seals out moisture and reduces friction. FRP Shields maintain the tapeís integrity against both normal and possible abnormal loading due to misalignments and/or support failure.

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