|Do we offer Copper instrumentation tubes?||No, however Parker Parflex offer copper instrumentation tubes|
|What are the range of Snap-Trap instrumentation tube clamp sizes?||ST-TC-0610M 6&10mm
ST-TC-02 Covers 13-25mm and 1/2 -1”
|Can we have 625 instrumentation tube in grade 1, or annealed condition?||Tubing provided by us is delivered to our own internal specifications. In this case, Alloy 625 supplied by Parker is furnished in the Grade 2 condition, and there are two main reason for doing that:
- The first one is that Grade 2, as you can see on ASTM B444, allows services over 70% C. As we do not know the operating conditions of most of the orders we serve, we make sure in this way that we are covering all the range (low and high temp applications).
- The second one, and most important of all, is the performance of a leak-free system. The hardness of the tubing is critical to ensure seal-ability and the hardness of Alloy 625, in any condition, is quite high, and needs to be controlled. We specify Grade 2 over Grade 1 to keep the instrumentation tube hardness within the recommended range that guarantees proper assembly, integrity and safety. Grade 1 is harder than Grade 2, which makes seal-ability and assembly much more difficult. And still, the pressure rating of the instrumentation tube-fitting system remains the same.
I understand that your customer has asked for Alloy 625 tubing in the annealed condition (Grade 1) but at Parker we only recommend the use of Grade 2 tubing (solution annealed). If you look at the certificates, both heats meet both the mechanical requirements of Grades 1 and 2, and pressure ratings remain the same for one or the other, so the customer should have no concerns about it. Also be aware that the solution annealing treatment is a much more optimized process and delivers the best corrosion resistance properties.
|Is our 316 tubing internally polished to ASME BPE-SF3?||No, we do not supply to this, or oxygen cleaned as standard.|
|Can our instrumentation tube bender be used with other materials?||It can be used with any material, limited only by the instrumentation tube thickness (and the strength of the user)|
|Is autoclave tubing available to NACE?||Inconel 625 tubing is purchased by Parker AE in the Annealed condition as standard and can be used for NACE application as shown in technical catalog. If you need the NACE certificate of conformance to ship with an order, the tubing must be ordered with the -SOG suffix. This will require us to hardness check each length prior to shipment and add minor cost for handling. The MTR cert will have a hardness statement on it as standard but this is not enough for us to issue a cert of NACE compliance... we have to do a separate hardness check. Some customers are OK with the MTR hardness and don't need the NACE certificate from us... this is a customer decision.
Same goes for Annealed 316 SS, 2507 Super Duplex, Hastelloy C276, Incoloy 825, 25-4SMO (6moly) bought to the working pressures shown in the Technical brochure. All of these materials are bought in the annealed condition as standard and are identified in the NACE/ISO 15156 documents as acceptable materials as long as the customer approves them for service.
If you want NACE certificate, you have to order with -SOG suffix
|What effect does bending instrumentation tube have on its pressure rating for Autoclave fittings?||Bending the instrumentation tube increases the hardness due to work hardening, so the pressure rating remains the same.|
|Can we mix instrumentation tube material with a valve material on autoclave products? i.e. one material for instrumentation tube, another for the valve?||We don't recommend this. instrumentation tube and valve material should match.|
|What is the maximum diameter of instrumentation tube you can bend by hand?||We would not recommend attempting to use a hand instrumentation tube bender on any instrumentation tube in excess of 1/4"|