Tube Fitting Performance Product Test Reports PTRs

Tube Fitting Performance Product Test Reports PTRs

and Third-Party Product Approvals and Registrations

Index

Tube fitting performance can be evaluated using three specific types of test criteria. These tests allow a tube fitting to be evaluated under varying dynamic conditions. The following Product Test Reports (PTRs), for Swagelok? tube fittings, are available upon request.

Tube Grip

The main function of a tube fitting is to grip the tubing sufficiently to contain system fluid. The tubing and fitting must remain connected without leakage at maximum working pressure. When overpressure occurs, such as in proof testing or when pressure spikes occur outside normal operating conditions, the fitting must also maintain both grip and seal on the tubing. Harder, heavy-wall tubing presents greater challenges for ferrule gripping action because it can be taken to higher pressure and is more resistant to the ferrule swaging or indentation. This gripping challenge on heavy-wall tubing may be severely compromised when fittings are under-tightened and / or not properly bottomed in the fitting body prior to installation. A high-quality tube fitting is designed to be more tolerant of these conditions.

PTR-3220 Hydrostatic Pressure Test--Heavy-Wall Tubing / Continuous . . . . . . . . . . . . 15 Production Performance Testing--316 Stainless Steel --1/4 to 1 in. and 6 to 25 mm

PTR-4060 Tensile Pull Test--Heavy-Wall Tubing--316 Stainless Steel . . . . . . . . . . . . . 19 --1/4 to 1 in. and 6 to 25 mm

PTR-385 Hydrostatic Pressure Test--Extra-Hard Tubing / Tubing Bottomed and . . . 22 Not Bottomed--316 Stainless Steel--1/4 to 1/2 in., 10 and 12 mm

PTR-390 Hydrostatic Pressure Test--Under-Tightened Fittings on Normal to . . . . . . 25 Extra-Hard Tubing / Tubing Bottomed and Not Bottomed-- 316 Stainless Steel--1/4 to 1/2 in. and 6 to 12 mm

PTR-391 Hydrostatic Pressure Test--Extra-Heavy-Wall Tubing . . . . . . . . . . . . . . . . . . 29 --316 Stainless Steel--1/4 to 1/2 in. and 6 to 12 mm

PTR-394 Hydrostatic Pressure Test--Under-Tightened Fittings / Extra- . . . . . . . . . . . 32 Heavy-Wall Tubing / Nominal to Extra-Hard--316 Stainless Steel --1/4 to 1/2 in. and 8 to 12 mm

PTR-393 Fire (Burn) Test with Water Quench (Reference API-607) . . . . . . . . . . . . . . . 35 --316 Stainless Steel--1/4 and 1/2 in.

PTR-4012 Hydraulic Impulse Test and Hydrostatic Proof Test . . . . . . . . . . . . . . . . . . . . 38 --316 Stainless Steel--1/4 to 1 in.

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Gas Seal

Evaluating small molecule gas applications is important when determining if a tube fitting is reliable. Performance of a fitting in high-pressure gas applications must be evaluated under the conditions of initial assembly and repeated reassembly of the components. Repeatable seal integrity in high-pressure gas testing after reassembly is the true test of a fitting design. Another challenge in gas seal applications pertains to thin-wall tubing, since it offers the least swaging resistance to provide for the coining action of the ferrules. In most applications, heavier-wall tubing provides a more reliable gas seal because it allows for ferrules to coin or reduce small defects on the tubing surface that could contribute to gas leakage.

PTR-3221 Nitrogen Gas Pressure Test--Thin-Wall Tubing / Continuous . . . . . . . . . . . . 45 Production Performance Testing--316 Stainless Steel --1/4 to 1 in. and 6 to 25 mm

PTR-395 Nitrogen Gas Pressure / Repeated Reassembly Test--Thin-Wall . . . . . . . . . 49 Tubing--316 Stainless Steel--1/4 to 1/2 in. and 6 to 12 mm

PTR-1192 Nitrogen Gas Pressure / Repeated Reassembly Test--Thin-Wall . . . . . . . . . 52 Tubing--316 Stainless Steel--5/8 to 1 in. and 14 to 25 mm

PTR-383 Helium Proof / Nitrogen Gas Pressure / Repeated Reassembly . . . . . . . . . . 56 Test--Heavy-Wall Tubing--316 Stainless Steel--1/4 to 1/2 in. and 6 to 12 mm

PTR-386 Thermal Cycle Test--Repeated 537?C (1000?F) / Cool Down. . . . . . . . . . . . 59 --316 Stainless Steel--1/4 to 1/2 in.

PTR-392 Steam Cycle / Thermal Shock Test--Repeated 192?C (377?F) . . . . . . . . . . . 61 Quench--316 Stainless Steel--1/4 and 1/2 in.

PTR-1369 Cryogenic Temperature Leak Test--Inboard Helium Leak Test. . . . . . . . . . . 63 --Thin-Wall Tubing--316 Stainless Steel--1/4 and 1 in.

PTR-1388 Cryogenic Temperature Leak Test--Outboard Helium Leak Test. . . . . . . . . . 65 --Thin-Wall Tubing--316 Stainless Steel--1/4 and 1 in.

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