Instrumentation Engineering Tools: Cross-Reference, Calculators & CAD
Reviewed by the Crestflo Engineering Team Home › Tools
What are Crestflo's online instrumentation engineering tools?
Crestflo's engineering tools are a suite of free, browser-based tube fitting tools built for buyers, designers and specifiers. They let you cross-reference, size, identify, configure and cost instrumentation tube fittings, valves and tubing, then move straight to a quote. Each tool answers one specification question. Which Crestflo part replaces this competitor fitting? What's this tube's working pressure? What thread is this? Which alloy suits my service? What does it cost delivered? From there it routes you to the matching product, material, standard or RFQ. Nothing dead-ends.
Crestflo's online engineering tools for specifying instrumentation fittings and valves are what "tools" means on this page: a cross-reference lookup, a tube pressure and wall-thickness calculator, a thread identifier, an alloy selector, a part-number configurator, CAD models on request, and a landed-cost-after-tariff calculator. This page isn't about physical installation tools like tube benders, cutters, deburring tools, or gap gauges. It's not about plumbing or PVC tooling either. If you need hands-on guidance for fitting make-up and gap-gauge inspection, check the ferrule installation and gauging guide.
This hub is also known as instrumentation calculators, fitting selection tools and a resource center
Engineers stumble across these tools under a dozen different labels. Some call the hub instrumentation tools, others say instrumentation fitting tools, engineering calculators, or instrumentation engineering calculators. You'll also hear free online fitting tools, fitting selection tools, a tube fitting selector, a design or spec-tools resource center, and even sizing or interchange tools. No matter which term you use, the seven tools below walk you down the same path from specification to quote for instrumentation flow-control components.
The seven online tools for specifying tube fittings & valves
Every tool's free, it runs right in the browser, and it ends with a product, material, standard or RFQ. Open any tool to get started, or scan the directory table below the cards.
- Tube-fitting cross-reference / interchange lookup, map a competitor part number to the dimensional Crestflo equivalent. Open the cross-reference tool →
- Tube pressure & wall-thickness calculator, allowable working pressure for an OD × wall × alloy. Open the pressure calculator →
- Thread identifier, name an NPT, BSP, JIC, SAE or metric thread from four measurements. Open the thread identifier →
- Alloy / material selector, shortlist alloys by media, temperature and chloride/H₂S. Open the alloy selector →
- Part-number configurator, build a valid Crestflo ordering code. Open the configurator →
- CAD models on request, request STEP/3D models for a specified part. Open CAD on request →
- Landed-cost (after-tariff) calculator, estimate true delivered US cost including duties. Open the landed-cost calculator →
Tools directory: function, input, output and where each routes
| Tool | What it does | Primary input | Output | Routes to | Standard basis |
|---|---|---|---|---|---|
| Cross-reference / interchange lookup | Maps a competitor part number to the dimensional Crestflo equivalent | Competitor brand + part number | Crestflo equivalent series (interchange, not "compatible") | Cross-reference hub, tube fittings, RFQ | ASTM F1387 interchange basis |
| Tube pressure & wall-thickness calculator | Allowable working pressure for an OD, wall and alloy | Tube OD, wall, material, temperature | Working-pressure figure + derating note | Tubing, P–T derating | ASME B31.3 allowable stress |
| Thread identifier | Identifies NPT, BSP, JIC, SAE and metric threads | Form angle, taper, TPI/pitch, gauge OD | Thread standard + Crestflo end connection | Thread guide, product pages | ASME B1.20.1, ISO 8434-2, DIN 2353 |
| Alloy / material selector | Shortlists alloys by service and media | Media, temperature, chloride/H₂S | Candidate alloys (316L → 6Mo → nickel → Ti) | Materials, selection by service | NACE MR0175 / ISO 15156 |
| Part-number configurator | Builds a valid Crestflo ordering code | Type, size, material, ends, ferrule | Part number + add to RFQ | Products, RFQ | Imperial + metric; hardened/non-hardened ferrule |
| CAD models on request | Provides 3D/STEP models for a specified part | Part / series | 3D model file, supplied to customers on request | Catalog, products | Datasheets & CAD available to customers on request |
| Landed-cost (after-tariff) calculator | Estimates true delivered US cost | Value, HTS, freight, duty | Estimated landed cost | How to buy, Why Crestflo | US HTS duty / tariff schedule |
Standard bases per the applicable ASTM, ASME, ISO, NACE and US HTS references; values per applicable standard, customizable to requirement.
Tube-fitting cross-reference & interchange lookup
The cross-reference / interchange lookup takes a Swagelok®, Parker®, Hoke®, Hy-Lok®, Fitok® or Gyrolok® part number and maps it to the dimensional Crestflo equivalent, so you don't have to hand-match dimensions to specify a drop-in interchange. Crestflo interchange is dimensional and backed by ASTM F1387 compression-fitting performance qualification. Call it an interchange or an equivalent. It's never "compatible," "intermix" or "genuine." The full interchange story, with brand-by-brand pages, sits on the cross-reference hub; for part-level matches, just request your Swagelok®/Parker® cross-reference from the engineering team. (Swagelok, Parker, Hoke, Hy-Lok, Fitok and Gyrolok are trademarks of their respective owners.)
Tube pressure & wall-thickness calculator
The tube pressure and wall-thickness calculator returns the allowable working pressure of an instrumentation tube from its OD, wall thickness, alloy and temperature, applying the ASME B31.3 allowable-stress method with the standard OD/wall tables built in. It also serves the reverse query, the minimum wall for a target pressure, and doubles as a tube size calculator with a built-in tube OD chart. Read the derivation in the tube sizing and wall-thickness guide and the pressure–temperature derating guide. (Covers: tube working-pressure, wall-thickness, burst and stainless-steel tube pressure-rating queries.)
Thread identifier: NPT, BSP, JIC, SAE & metric
The thread identifier tells you how to identify a thread on a fitting, pipe thread or port from four measurements, form angle, taper vs parallel, TPI or metric pitch, and gauge OD, resolving NPT, NPTF, BSPT, BSPP, JIC 37°, SAE ORB, SAE 45°, DIN 2353 metric and ISO parallel connections. It doubles as an NPT and pipe thread identifier. The identifier reports the governing standard (ASME B1.20.1, ISO 8434-2, DIN 2353) and the matching Crestflo end connection; the method and printable thread identification charts are in the thread identification guide.
Alloy / material selector
The alloy / material selector, a grade selector for corrosion service, narrows down candidate grades by media, temperature and chloride or H₂S content across Crestflo's 25-plus alloy range. That includes 316/316L, 904L, Duplex 2205, Super Duplex 2507, 254 SMO, AL-6XN, Alloy 20, Inconel, Incoloy, Monel, Hastelloy, Nickel 200/201 and Titanium Gr2, with NACE MR0175 / ISO 15156 flags for sour service. You'll find deeper guidance in material selection by service and sour-service selection (NACE); grade data lives on the materials pages.
Part-number configurator & CAD models on request
Crestflo's part-number configurator is a part-number builder. It puts together a valid ordering code from fitting type, size, material, end connections and ferrule (hardened or non-hardened), and it handles both imperial and metric units. Once built, the code goes straight into an RFQ.
CAD downloads and datasheets aren't sitting out as open public files. Customers request them instead, specifying the model format they need for a given part: STEP, 3D solid, DWG or DXF. That request goes through CAD on request. The public catalog is there for browsing.
Landed-cost (after-tariff) calculator
The landed-cost after-tariff calculator, effectively a duty and import-cost calculator for instrumentation fittings, estimates your true delivered US cost, product, freight and US import duties/tariffs on the applicable HTS line, so you can compare Crestflo honestly against US-stocked majors. Crestflo product is of Indian origin, with US / European melt available on request and full material traceability; standard items ship on a 6–8 week delivery. See how to buy and why Crestflo for the cost and lead-time picture.
Physical vs digital: what these tools are (and are not)
The head terms "tube fitting tools" and "pipe fitting tools" also cover physical installation tools, tube benders, tube cutters, deburring tools, flaring tools and gap gauges, the kit a competitor's "tube fitter's tool guide" catalogs. Crestflo manufactures the fittings and valves, not those hand tools; the tools on this page are digital. One field point matters for specification: instrumentation compression fittings are pulled up by turns from finger-tight, not to a torque value, and the pull-up is verified with a gap-inspection (gaugeability / no-go) gauge, the method is covered in the ferrule installation and gauging guide, and Crestflo's own tube installation tools and spare ferrules and nuts support that work.
| Physical installation tools (not the subject of this page) | Crestflo online engineering tools |
|---|---|
| Tube bender | Cross-reference / interchange lookup |
| Tube cutter | Tube pressure & wall-thickness calculator |
| Deburring tool | Thread identifier |
| Flaring tool | Alloy / material selector |
| Gap-inspection (gaugeability) gauge | Part-number configurator & CAD on request |
Standards & proof behind the tools
Since a manufacturer owns these tools, their outputs count as vendor-authoritative, tied to the standards Crestflo builds to, not guesses from some third party. Each tool rests on a published basis:
| Tool | Applicable standard(s) | What it proves |
|---|---|---|
| Cross-reference / interchange | ASTM F1387 | Compression tube-fitting performance qualification behind the dimensional interchange (fittings) |
| Tube pressure & wall-thickness | ASME B31.3 | Allowable-stress method for tube working pressure |
| Thread identifier | ASME B1.20.1 (NPT), ISO 8434-2 (37° flare), DIN 2353 | Governing thread forms and dimensions |
| Alloy selector | NACE MR0175 / ISO 15156 | Sour-service material limits |
| Valve specification (referenced) | ASME B16.34, API 6D / 598 / 602 | Valve pressure–temperature qualification (valves qualify to B16.34/API, not F1387) |
Values per applicable standard; customizable to requirement.
Every Crestflo part carries a heat/lot number with EN 10204 3.1 MTC as standard (3.2 on request), and Crestflo is ISO 9001 / 14001 / 45001 & PED certified. Certificates are held in quality and traceability; interchange rests on ASTM F1387.
Specify it, then request a quote
Use a tool to spec the part, then convert. Browse tube fittings, instrumentation valves, high-pressure fittings and instrumentation tubing, or go straight to an RFQ.
- Request a Quote, the primary path for any part you configure.
- Request a Sample, validate fit before you commit.
- Request your cross-reference, send a competitor part number for the Crestflo interchange.
- Talk to an engineer, designing it in, or working from a print.
Why Crestflo
Crestflo is a US-serving manufacturer of instrumentation fittings and valves, the instrumentation division of a four-decade-old, Government-of-India-recognized export house with a proven Middle-East delivery record. The tools above turn that manufacturing depth into directly quotable answers.
- Drop-in interchange for Swagelok®, Parker®, Hoke®, Hy-Lok® and Fitok®, with performance qualified against ASTM F1387.
- 6–8 week delivery. Standard items ship from ready stock; specials are made to order. Compare that to 20-plus weeks, which is typical of the majors.
- Both imperial and metric sizes on every fitting; hardened and non-hardened ferrules to requirement.
- 25-plus alloys, including high-nickel and corrosion-resistant grades, NACE MR0175 / ISO 15156 compliant where required.
- Heat/lot traceability with EN 10204 3.1 MTC standard (3.2 on request); ISO 9001 / 14001 / 45001 & PED certified.
- Indian origin; US / European melt available on request, with full material traceability. Small MOQ, private-label and made-to-print options.
We Engineer Confidence. Reach us at sales@crestflousa.com or call +1 346 594 9005 (Houston, TX), or head over to How to Buy to get started.
Frequently asked questions
What online tools does Crestflo offer?
Seven free browser tools, all built into the site: a tube-fitting cross-reference and interchange lookup, a tube pressure and wall-thickness calculator, a thread identifier, an alloy selector, a part-number configurator, CAD models on request, and a landed-cost-after-tariff calculator. Each one links straight to the matching product, material, standard or RFQ.
Are these physical tube fitting installation tools like benders or gap gauges?
No. Crestflo makes the fittings and valves; these tools just help you spec and quote them. If you need hands-on installation and gap-gauge inspection guidance, check the ferrule installation and gauging guide.
What tools are commonly used to install a tube fitting?
A tube cutter, a deburring tool and a gap-inspection (gaugeability) gauge to check pull-up. You set instrumentation compression fittings by turns from finger-tight, not by torque value. Crestflo's tube installation tools accessory line covers that work.
How do I cross-reference a Swagelok or Parker part to Crestflo?
Use the cross-reference lookup: type in the competitor's part number and you'll get the dimensional Crestflo equivalent, qualified per ASTM F1387. This is an interchange, not an OEM part, and not a "compatible" part either. If you need a part-level match, ask the engineering team for your cross-reference.
Can I calculate a tube's working pressure?
Yes. The tube pressure and wall-thickness calculator takes OD, wall, alloy and temperature, then applies the ASME B31.3 allowable-stress method, with the standard OD/wall tables already built in. Values follow the applicable standard, and you can customize them to fit your own requirement.
Do you provide CAD or 3D models?
Yes, via CAD on request. Datasheets and CAD models are made available to customers on request for a specified part, rather than as open public downloads.
What is the landed-cost calculator for?
The landed-cost calculator estimates your true delivered US cost including duties and tariffs on the applicable HTS line, so you can compare Crestflo honestly against US-stocked majors. Product is of Indian origin and ships on a 6–8 week delivery; US / European melt is available on request.
Which alloy should I choose?
The alloy selector sorts through more than 25 grades, 316L, 6Mo, duplex, nickel, titanium, and suggests candidates based on media, temperature and chloride or H₂S content. It flags sour-service options against NACE MR0175 / ISO 15156 as it goes. Anyone weighing 316 against a higher-alloy option will find the comparison laid out clearly.
Do the tools cover metric and imperial?
Yes. All Crestflo fittings, along with the part-number configurator, work with both imperial and metric sizes.
Do valves qualify to ASTM F1387 like the fittings?
No. ASTM F1387 covers compression tube fittings, nothing more. Crestflo valves are qualified against the valve standards that actually apply to them, ASME B16.34 and API 6D / 598 / 602. The standards table above lays this out.
What happens after I use a tool?
Every tool points you to the right product, material or standard page, and from there straight into an RFQ. Configure the part, then request a quote or a sample.
Related tools, products and guides
- Tools: cross-reference lookup · tube pressure calculator · thread identifier · alloy selector · part-number configurator · CAD on request · landed-cost calculator
- Products: tube fittings · instrumentation valves · high-pressure fittings · instrumentation tubing · ferrules
- Guides: ferrule installation & gauging · tube sizing & wall thickness · thread identification guide · material selection by service · pressure, temperature derating
- Get started: Request a Quote · Request a Sample · How to Buy · Why Crestflo · Contact / talk to an engineer