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MA-005 - MINITRANS Installation Manual - Rev 3.1
29-Sep-15
Page 41 of 85
Tubing Specification and Ordering Details
Appendix D
Specifications
D.1
Rigid Tubing
¼ in. OD X 0.035 in. wall T316 seamless stainless steel tubing (6.35 mm
OD X 0.889 mm wall) (ASTM A269 / A213).
Flexible hose
¼ in. ID low pressure, 316 stainless steel braid over stainless steel metal
flexible hose with welded ¼ in. compression fittings on each end.
Order Information (E.g. Swagelok)
D.2
Rigid Tubing
Rigid tubing can be ordered from Swagelok in advance of the
installation. For example, a 20 foot length would have part number SS-
T4-S-035-20 (see the Swagelok website
www.swagelok.com
or your local
Swagelok representative).
Flexible hose
Flexible hose can be ordered from Swagelok, but must be ordered in
custom lengths well in advance of the installation. For example, a
custom 8 meter FL series hose would have part number SS FL4TA4TA4-
800 (specified in centimetres) (see the Swagelok website
www.swagelok.com
or your local Swagelok representative).
Do not
use copper tubing (See Section D.6).
Tubing Unions
D.3
Tubing Unions connect two pieces of the above ¼ in. tubing together. GE recommend:
Swagelok: SS-400-6 Stainless Union, ¼ in. OD
Ham-Let: 762L SS 1/4 Stainless Union, ¼ in. OD
Shut-Off Valve
D.4
If the oil supply or return valve is located more than 6 ft (1.82 m) above the base of the
transformer, use a Swagelok tube fitting (SS-4P4T Stainless Plug Valve, ¼ in.) or a Ham-
Let tube fitting (H800MSSL Stainless Plug Valve, ¼ in.) as directed in this procedure.
6 mm Tubing Adaptors
D.5
If ¼ in. tubing is not available, 6 mm stainless steel tubing may be used, but the
maximum tubing run may be reduced, and ¼ in. to 6 mm tubing adaptors must be used.
Consult with the GE Customer Service Centre. The adaptors should be Swagelok (SS-6M0-
R-4 Stainless Reducer, 6 mm OD – ¼ in. OD) or Ham-Let (767LT SS Stainless Reducer, 6
mm OD – ¼ in. OD). At least eight of these are required for the installation.