Hammer Weco Specification

Weco Hammer Unions

MisMatched Unions have

caused fatal accidents !

Weco Hammer Unions

Do you know :

•

… what are Weco Unions and who makes them?

•

… what are the Dowell Standards?

•

… of the potentially fatal hazards?

•

… how to eliminate the hazards?

Weco Hammer Unions

… what are they? … who makes them?

… connectors for temporary pipe and flow lines installations.

•

FMC acquired the original Weco company, in t h e 1950s.

•

The design is old, and manufactured many companies.

•

… used in stee l and chemical plants, on marine dredging

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vessels, in strip mines, and in the oil industry.

… more than a dozen design variations;

•

… designated by the nominal pipe diameter and a ‘Fig’ number

i.e. 2” 1502.

Fig 100

1000 psi

2” to 8”

Fig 211

2000 psi

1” to 4”

Fig 602

6000 psi

1” to 4”

Fig 1502

15,000 psi

1” to 4”

Fig 200

2000 psi

1” to 4”

Fig 206

2000 psi

1” to 10”

Fig 400

2500 to 4000 psi

2” to 12”

Fig 600

6000 psi

1” to 4”

Fig 1002

10,000 psi

1” to 6”

Fig 1003

10,000 psi

2” to 5”

Fig 2002

20,000 psi

2” or 3”

Fig 2202

15,000 psi - H

2” to 3”

S

2

Dowell Standa rds

Dowell Uses these High Pressure Weco Unions

Pressure Rating

Weco Hammer Unions

Standard Service Sour Gas Service Series Working Test

Working Test (dia - in ches)

.

Nominal Pipe Sizes

1002 10,000 15,000 7,500 12,000 4, 5 1502 15,000 22,500 10,000 15,000 1, 1½, 2, 3, 2002 20,000 30,000 NA NA 3

.

The First Hazard

A 2” 1502 Wing Nut will make up to a 2” 602 or 1002 thread half but will fail … explosively.

Standard Series Working Nominal Pipe Sizes

602

1002

(Figure) Pressure (dia - inches) 100 1,000 2, 2½, 3, 4, 6, 8 200 2,000 1, 1¼, 1½, 2, 2½, 3, 4 206 2,000 1, 1¼, 1½, 2, 2½, 3, 4, 6, 8, 10 207 2,000 3, 4, 6, 8, 10 211 2,000 1, 1¼, 1½, 2, 2½, 3, 4

Potentially Fatal

Combinations

400 2,500 5, 6, 8, 10, 12 400 4,000 2, 2½, 3, 4 600 6,000 1, 1½, 2, 2½, 3, 4 602 6,000 1, 1¼, 1½, 2, 2½, 3, 4 1002 10,000 1, 1¼, 1½, 2, 2½, 3, 4, 5, 6 1003 10,000 2, 3, 4, 5

1502 15,000

2002 20,000 2,3 2202 15,000 2, 2½, 3

1, 1½, 2, 2½, 3, 4

.

1502

The First Hazard

A 2” 1502 Wing Nut will make up to a 2” 602 or 1002 thread half and will hold some pressure ! However … … it will fail explosively.

o 4 1/8” Nominal Thread Diameter

o 3 Threads per Inch

o Standard Acme 2G Thread Form

2” 1502

Wing Nut

Weco Hammer Unions

2” 1502

Wing Nut

2” 1502

Female Sub

2” 602, or 1002

Female Sub

o 3 13/16” Nominal Thread Diameter

o 3 Threads per Inch

o Stub Acme 2G Thread Form

Weco Hammer Unions

Prevention

Destroy 2” 602 & 1002 Weco unions or

Weco Hammer Unions

old

When there is uncertainty …

(Connecting to other companies equipment)

Use the Go No-Go Gage to be sure y ou have

a 1502 Thread Half (Female Sub)

Guiberson

No Go

Unions found in your operation.

Order from Wood Machine - Tulsa

Fax : 918-437-0007

Dowell P/N 47990000

2” 1502

Go

2” 602/1002

Prevention

Weco Hammer Unions

Find the Identification Markings Wing Nut … Here

(2” 1502)

on the

Weco Hammer Unions

Union Gage Ring will go over threads

The Second Hazard

Off brand unions may not hold rated pressure.

Weco Hammer Unions

Use only Unions supplied by FMC and in good condition.

Weco Hammer Unions

The Third Hazard

Like 1002 and 602 Unions, a Guiberson thread half will make up to a 1502 wing nut, but will fail explosively.

Use only Unions supplied by FMC and in good condition.

Guiberson unions have been banned from Dowell operations for more than ten years. Be sure there are none remaining in your operation.

Weco Hammer Unions

The Fourth Hazard - The FR Male Union

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Since 1995 FMC offers a Fatigue Resistant Male Union

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FR Components will fit on Non FR assemblies

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Mixed assemblies may fail below the rated pressure.

Standard Male Union Flat Nut and Segments

FR Male Union Tapered Nut and Segments

Do not mix FR and Non FR Male Union Parts.

See Maintenance Bulletin 957.

Recap

Weco Hammer Unions

•

Suppliers

•

o A 2” 1502 Wing Nut will attach to a 2” 602 or 1002 Thread Half and hold limited pressure, but will fail explosively. o Off brands may not hold rated pressure o Beware of old Guiberson connections. o Do not mix FR and non FR Wing Nut (Male Ends)

•

o There are many suppliers

The Hazards

Prevention

(use only FMC)

.

o Use only 2” 1502 unions by FMC, in good c ondition. o Check before you connect : o Use the Go No-Go Gage to insure a 2” 1502 thread ha lf. o Look for 2” 1502 on the Wing Nut.

Optional Slides

Weco Hammer Unions

This 1998 IADC Safety Alert followed a fatal accident on a drilling rig in the USA Gulf of Mexico.

Weco Hammer Unions

ALERT 98-1

A drill crew was drilling ahead when a third party pressure sensor attached to the stand pipe stopped working. The sensor was made up to the standpipe with a size "602" hammer union rated at 6,000 psi working pressure. The crew removed the faulty sensor and replaced it. The hammer union on the new pressure sensor had a size "1502" wing nut rated to 15,000 psi. The "1502" female threads in the wing nut appeared completely made up to the "602" male threads coming off the standpipe.

The mud pumps were engaged and drilling operations resumed. As the mud pump pressure increased, no leaks were detected. Then, at approximately 2,000 psi, the pressure sensor and "1502" wing nut were blown off the standpipe. Fortunately, no one was struck by the projectile or the ensuing stream of drilling fluid. Approximately one barrel of oil-based mud was sprayed on the rig floor before the mud pumps were secured and the standpipe was isolated.

The mishap was considered an environmental incident and a significant near miss, which could have resulted in serious injury or death.

After investigating the incident, operator offered the following suggestions:

1.Only unions with like threads should be made up. Although mismatched threads may appear made up (as they did in this case), only a portion of the threads are engaged and the union will fail under pressure.

2.Both halves of the union should have the same pressure rating.

3.All pressure lines should be inspected to ensure there are no mismatched unions.

High Pressure Lines and Hammer Unions

Safety Alert

This material is pres ented for infor mation purpo ses only. Manag ers & supervisors should evaluate this informatio n to determine if it can be applied to their own situations and practices. From : http://iadc.org/alerts/sa98-1.htm

Weco Unions - Variations

Pressure Rating Standard Service Sour Gas Service Series Working Test Working Test Nominal Pipe Sizes

100 1,000 1,500 NA NA 2, 2½, 3, 4, 6, 8 200 2,000 3,000 NA NA 1, 1¼, 1½, 2, 2½, 3, 4 206 2,000 3,000 NA NA 1, 1¼, 1½, 2, 2½, 3, 4, 6, 8, 10 207 2,000 3,000 NA NA 3, 4, 6, 8, 10 211 2,000 3,000 NA NA 1, 1¼, 1½, 2, 2½, 3, 4 400 2,500 3,750 2,500 3,750 5, 6, 8, 10, 12 400 4,000 6,000 4,500 6,000 2, 2½, 3, 4

Weco Hammer Unions

600 6,000 9,000 NA NA 1, 1½, 2, 2½, 3, 4 602 6,000 9,000 6,000 9,000 1, 1¼, 1½, 2, 2½, 3, 4 1002 10,000 15,000 7,500 12,000 1, 1¼, 1½, 2, 2½, 3, 4, 5, 6 1003 10,000 15,000 7,500 12,000 2, 3, 4, 5 1502 15,000 22,500 10,000 15,000 1, 1½, 2, 2½, 3, 4 2002 20,000 30,000 NA NA 2,3 2202 NA NA 15,000 22,500 2, 2½, 3

Look Alikes - Weco 1502 & 1002

Weco Hammer Unions

Weco 1502

Hammer Union Assembly

Weco 1002

Hammer Union Assembly

Look Alikes - Weco 1502 vs 602

Weco Hammer Unions

Weco 1502

Hammer Union Assembly

Weco 602

Hammer Union Assembly

Look Alikes - Weco 602 & 1002

Weco Hammer Unions

Weco 602

Hammer Union Assembly

Weco 1002

Hammer Union Assembly

Look Alikes - Weco 1502 vs 402

A 2” 1502 Wing Nut will, also, attach

to a 2” 402 Thread Half.

Weco Hammer Unions

Weco 1502

Hammer Union Assembly

Weco 400

Hammer Union Assembly