High Pressure Tubing

Harwood’s high pressure tubing is of premium quality made to exacting standards by the best mill practice for proper metallurgy, quality, strength and finish.  It is free of radial cracking insuring long service life. The solid high pressure tubing is normally supplied in type 304 stainless steel.

 

The composite tubing is made with cold drawn 304 stainless steel cores shrouded with either premium alloy steel or stainless steel.  Distinct advantages result from the use of composite tubing in the larger sizes in better control of metallurgy, strength and quality.
Details on connections and fittings for each tubing series can be found here.

 

Below is a table of our high pressure seamless tubing:

 

Part Number Fitting Series Tubing Series Outside Diameter Inside Diameter Working Pressure Tubing Proof Pressure Tubing Strength Rupture Pressure
A-13914 2M* 2M-.025 1/8″ .025″ 150,000 psi 175,000 psi 300,000 psi
A-13473 3M* 3M-.025 3/16″ .025″ 200,000 psi 200,000 psi 300,000 psi
A-13756 4L* 4L-1 1/4″ 1/16″ 100,000 psi 120,000 psi 180,000 psi
A-13876 4L* 4L-1.5 1/4″ 3/32″ 70,000 psi 90,000 psi 125,000 psi
A-13870 5M* 5M-1 5/16″ 1/16″ 125,000 psi 150,000 psi 210,000 psi
A-13487 6L* 6L-2 3/8″ 1/8″ 60,000 psi 90,000 psi 140,000 psi
A-13871 6M* 6M-1 3/8″ 1/16″ 150,000 psi 175,000 psi 230,000 psi
A-13872 8L* 8L-2 1/2″ 1/8″ 100,000 psi 120,000 psi 150,000 psi
A-13875 9L-3* 9L-3 9/16″ 3/16″ 60,000 psi 90,000 psi 120,000 psi
A-13486 9L-5* 9L-5 9/16″ 5/16″ 20,000 psi 40,000 psi 60,000 psi
A-13873 12H-1** 12H-1 3/4″ 1/16″ 200,000 psi 200,000 psi 200,000 psi
A-13874 12H-2** 12H-2 3/4″ 1/8″ 180,000 psi 200,000 psi 200,000 psi
A-14685 15F** 15F-5 15/16″ 5/16″ 50,000 psi 75,000 psi 120,000 psi
A-14686 16F** 16F-4 1 1/4″ 100,000 psi 120,000 psi 160,000 psi
A-14684 24F** 24F-8 1 1/2″ 1/2″ 50,000 psi 75,000 psi 120,000 psi

* Solid type 304 SST     ** Composite type 304 SST core with alloy shroud

 

Considerable savings can be provided for purchases made in quantity. Price lists are available upon request. Pricing is specified as price per foot (with additional charges for cutting, coning, and threading).

 

It is recommended that all high pressure tubing, whether ours or someone else’s, be autofrettaged before being put into service – the fatigue life will be greatly enhanced. This is a service we can provide.

 

Coning, Threading, and Seating Tools

For those who wish to handle the tube preparation themselves, coning, threading, and seating tools for most tubing sizes are available for purchase. The table below gives information on our tooling:

HARWOOD PART NUMBERS

TUBE SERIES

TUBING SIZE O.D.” X I.D.”

CONING TOOL

REPLACEMENT CUTTER BLADE

THREADING TOOL

REPLACEMENT DIE

REPLACEMENT BUSHING

SEATING TOOL

2M-.025

1/8 X .025

C-1992

B-3756

C-1990

A-3570

A-9800

3M-.025

3/16 X .025

C-2188

B-3756

C-2190

A-4406

A-9800

4L-1

1/4 X 1/16

C-2653

B-3756

A-3499

A-4102

A-8835

4L-1.5

1/4 X 3/32

C-2653

B-3756

A-3499

A-4102

A-8835

5M-1

5/16 X 1/16

C-2193

B-3756

A-3501

A-4101

A-8835

6L-2

3/8 X 1/8

C-2654

B-3756

A-3503

A-4090

A-9151

6M-1

3/8 X 1/16

C-2654

B-3756

A-3503

A-4090

A-8835

8L-2

1/2 X 1/8

C-2655

B-3756

A-3505

A-4091

A-9151

9L-3

9/16 X 3/16

C-2656

B-3756

A-3507

A-4092

A-9831

9L-5

9/16 X 5/16

C-2656

B-3756

A-3507

A-4092

A-10929

12H-1

3/4 X 1/16

D-1556-A

A-3609

B-2605-A

B-7431

12H-2

3/4 X 1/8

D-1556-A

A-3609

B-2605-A

A-9151

15F-5

15/16 X 5/16

D-1556-B

A-4089

B-2605-B

15F-4

1 X 1/4

D-1556-C

A-6100

B-2605-C

rov