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 ensuring 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.
View high pressure connections and fittings
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 | Rupture Pressure In Excess of |
|---|---|---|---|---|---|---|---|
| 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 | – |
