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GC ACCESSORIES |
GAS PURIFICATION ESSENTIALS
Tubing
frequently
asked
question
Which treated
tubing should
I use?
Instrument-GradeWelded and Drawn 304 Grade Stainless Steel Tubing
Clean tubing is critical to ensure the delivery of pure gas to your instrument. Restek’s
stainless steel tubing is cleaned specifically for inertness using the procedure for pro-
cessing Silcosteel® and Siltek®-treated products, because scrupulously clean parts are a
prerequisite for a quality coating. This ensures you are getting quality tubing for your
chromatography system.
*The availability of long lengths (continuous lengths up to 500 feet) is subject to inventory constraints. Please
inquire before ordering.
An extra charge is applied for cutting and/or
straightening stainless steel and/or copper
tubing, calculated from the total number of
pieces produced for each line item
:
# of Pieces
Added Charge
5 to 15
16 to 30
31 to 75
76 to 99
100 to 200
Tubing
Length (per-foot pricing on 26 feet or more)
Dimensions
25 Feet
26–100 Feet
>100 Feet*
ID (in.)
OD (in.)
cat.#
price
cat.#
price
cat.#
price
0.01"
1
/
16
"
21500
$67
21501
21502
0.02"
1
/
16
"
21503
$67
21504
21505
0.03"
1
/
16
"
21506
$67
21507
21508
0.04"
1
/
16
"
21509
$67
21510
21511
0.085"
1
/
8
"
21512
$60
21513
21514
0.21"
1
/
4
"
21515
$72.50
21516
21517
Precleaned Copper Tubing
• Adheres to ASTM B-280.
• Precleaned and ready to use.
• Use for plumbing GC systems.
ID
OD
Wall
qty.
cat.#
price
0.065"
1
/
8
"
0.030"
50 ft.
21590
0.190"
1
/
4
"
0.030"
50 ft.
21592
Plumbing a GC
It is essential to use clean chromatographic-grade tubing to plumb a GC. Standard-grade tubing
contains residual hydrocarbon contaminants from the drawing process. These contaminants
migrate into the carrier gas stream, elevating background noise and causing down time.
ordering
note
Required length in meters x 3.2808 =
length in feet.
Siltek®/Sulfinert® Electropolished 316L SS
Siltek®/Sulfinert®
304 SS
Siltek®/Sulfinert®
316L SS
Silcosteel®-CR
Electropolished
316L SS
low
intermediate
high
ppm
ppb
ppt
sensitivity range
aggressive
intermediate
mild
acidic corrosion
pressure range
Restek Tubing Reference Guide
This chart will help
you determine the
tubing best suited to
your application with
respect to pressure,
sensitivity of your
analysis, and acidic
environment exposure.
For more frequently
asked questions on
treated tubing, see
previous page.
tech
tip
0
Website :
E-mail :
TelNo : 03 9762 2034 . . . in AUSTRALIA
Mar 2011
