Cone & Thread Fittings Supplier in North Dakota
Crestflo supplies cone and thread fittings across North Dakota, reaching from Bakken and Three Forks wellsites in the Williston Basin to the associated-gas processing plants, the Mandan and Dickinson refineries, and the Great Plains Synfuels coal-to-SNG complex at Beulah. We serve North Dakota as a US manufacturer, not as a company based there. Standard items ship from ready stock. Specials are made to order, and delivery runs 6–8 weeks plus inland rail and truck transit. Every cone-and-thread fitting comes in high-tensile stainless and corrosion-resistant alloys matched to what North Dakota actually demands: sour Bakken gas, hyper-saline produced water, sub-arctic cold and coal-gasification syngas. Ratings go up to 30,000 psi, with heat-number traceability and EN 10204 3.1/3.2 material test certificates.
In this context, "cone and thread fittings" refers to high-pressure instrumentation and process connections: a coned tube end drawn against a collar by a threaded gland, used for gauge, impulse, injection, manifold and syngas lines. It doesn't cover hydraulic hose couplings or plumbing compression fittings.
What Are Cone and Thread Fittings?
Cone and thread fittings are high-pressure connectors that join tubing, valves, gauges and instruments on fluid systems running above standard instrumentation pressures. The tube end gets machined to a cone and cut with an external thread; a threaded gland then draws that cone against a mating collar, forming a metal-to-metal seal at pressures where a conventional single-ferrule compression fitting simply isn't rated anymore. On North Dakota systems they show up on over-pressured Bakken and Three Forks gauge and injection lines, on high-pressure gas-processing and NGL skids, on saltwater-disposal injection hookups, and most distinctively on the gasification, gas-cleanup and CO2-for-EOR streams at the Great Plains Synfuels Plant. The focus here is cone and thread fittings as supplied to North Dakota. For the full ordering matrix and every pressure class, see the national cone-and-thread fittings hub.
Cone and Thread Fittings Also Known As
North Dakota buyers specify these connections under several names. Cone and thread fittings are also called coned-and-threaded fittings, cone-and-thread high-pressure fittings, medium- and high-pressure (MP/HP) fittings, autoclave-type fittings, gland-and-collar fittings, and high-pressure tube fittings. Related high-pressure connection standards referenced alongside them include 37° flare (ISO 8434-2) and NPT (ASME B1.20.1) threaded ends, and the family is compared against standard compression joints on the cone-and-thread vs compression guide. Crestflo rates the broader high-pressure line across 3,000 psi to 20,000 psi pressure classes under the high-pressure fittings & valves hub.
Who Buys Cone and Thread Fittings in North Dakota
North Dakota's cone-and-thread demand is driven almost entirely by the energy sector, and it clusters in the western half of the state. Four real hubs stand out there.
Bakken / Three Forks upstream (Williston Basin, NW North Dakota). Stacked, over-pressured tight-oil reservoirs here produce light sweet crude with rich associated gas across Williams, McKenzie, Mountrail and Dunn counties. Williston, Watford City and Dickinson serve as the hubs. Operators include Continental Resources, Chord Energy (enlarged by the Enerplus acquisition), Chevron (which completed its acquisition of Hess in July 2025), Devon Energy (via Grayson Mill), ConocoPhillips (Burlington Resources plus Marathon Oil) and ExxonMobil / XTO. These are the buyers of over-pressured wellsite gauge, injection and manifold fittings.
Associated-gas gathering, processing & NGL. North Dakota's gas-capture build-out has created a durable plant-instrumentation base. The Tioga Gas Plant (Hess Midstream, now under Chevron; roughly 400 MMcf/d) anchors part of it, and ONEOK, the largest gatherer and processor in the Williston Basin, runs the rest through its Garden Creek, Stateline, Bear Creek (Dunn County) and Demicks Lake (McKenzie County) plants. High-pressure and cryogenic NGL skids push demand for cone-and-thread, DBB and manifold fittings.
Refining, the state's only two refineries. One is the Marathon Petroleum Mandan Refinery (roughly 72,000 bpcd, Morton County), which processes sweet ND crude. The other is the Marathon Dickinson renewable-diesel facility (Stark County). Both call for crude/vacuum, hydrotreating and high-pressure hookups.
Coal-to-synthetic-natural-gas gasification (globally distinctive). The Great Plains Synfuels Plant (Dakota Gasification Company, Beulah, Mercer County) stands as the only commercial-scale coal-to-SNG plant in the United States. It gasifies roughly 16,000 tons a day of lignite and ships high-purity CO2 by pipeline to Saskatchewan for enhanced oil recovery, generating high-pressure syngas, gas-cleanup and CO2 streams along the way.
Cone and thread fittings make sense for North Dakota because over-pressured Bakken upstream, high-pressure gas-processing and injection service, and coal-gasification syngas all run at pressures that push connections past standard tube-fitting ratings. That's exactly why oil & gas and midstream gas-processing buyers standardize on them.
Recommended Alloys & Specs for North Dakota Cone-and-Thread Service
North Dakota Bakken crude is light and sweet, but four real service conditions push material selection well beyond standard 316. Cone-and-thread fittings should be alloy-matched to the driver:
| North Dakota service condition | Where (cluster) | Recommended Crestflo alloy | Governing standard | Crestflo product form |
|---|---|---|---|---|
| Sour gas (H2S), rising in the Bakken; inherent in coal-gasification syngas | Wellsite separators, gas gathering, amine/sulfur units; Beulah syngas cleanup | 316/316L (controlled hardness), Duplex 2205, Super Duplex 2507, Inconel 625, Inconel 825, Monel 400 | NACE MR0175 / ISO 15156 | Sour-service cone-and-thread fittings & manifolds, NACE-marked |
| Chloride-rich produced water / saltwater disposal (Williston Basin brine, TDS up to ~400,000 mg/L) | SWD injection skids, produced-water gathering/recycle, separator water legs | Super Duplex 2507, 254 SMO, AL-6XN, 904L, Alloy 20 | ASTM A276 / A479; NACE MR0175 where H2S present | High-PREN CRA cone-and-thread & injection fittings |
| Cold-climate / low-temperature + cryogenic NGL (ND winters to ~−40 °F) | Outdoor wellsite/plant tubing, impulse lines, cryo NGL sample/gauge lines | 316/316L austenitic stainless (toughness retained at cryogenic temperature, no ductile-to-brittle transition) | ASTM A479; values per applicable standard | Cold-weather cone-and-thread, heat-traced impulse & gauge fittings |
| Custody-transfer / wellsite & metering, high-cycle, traceable, drop-in | Wellsite manifolds, LACT units, crude-by-rail metering skids | 316/316L, hardened ferrules where compression ends apply | ASTM A276 / A479 | Cone-and-thread & manifold fittings, heat-number traceable |
Sour gas and sour service across upstream operations and coal gasification drive most of the regional demand. That pushes NACE MR0175 requirements onto 316L, Duplex 2205, Super Duplex 2507 and Inconel 625/825. Chloride-rich produced water and brine form the second anchor, calling for high-PREN CRA grades such as 2507, 254 SMO, AL-6XN and Alloy 20. Cold climates and cryogenic NGL service add a third factor that cuts across the others: low-temperature toughness, met by 316 and 316L. Values follow whichever standard applies, and they can be adjusted to the customer's requirement.
Cone and Thread Fittings Specifications at a Glance
| Attribute | Value |
|---|---|
| Fitting type | High-pressure cone-and-thread (gland & collar); coned-and-threaded tube ends |
| Working pressure | Cone-and-thread up to 30,000 psi; medium- and high-pressure classes per applicable standard |
| Size range | High-pressure tube/line sizes; imperial and metric |
| Materials | High-tensile SS 316/316L, Duplex 2205, Super Duplex 2507, 254 SMO, AL-6XN, 904L, Alloy 20, Inconel 625/825, Monel 400 |
| End connections | Cone-and-thread (MP/HP), NPT (ASME B1.20.1), 37° flare (ISO 8434-2), tube and weld ends |
| Certifications | ISO 9001 / 14001 / 45001 & PED certified; NACE MR0175 / ISO 15156 where specified |
| Traceability | Heat/lot number on every part; EN 10204 3.1 MTC standard, 3.2 on request |
| Origin | Indian origin; US / European melt available on request, with full material traceability |
Full specifications and ordering codes live on the cone-and-thread fittings hub. What follows here is just the North Dakota-relevant slice of that page.
Cone-and-Thread vs Compression: Which High-Pressure Joint for North Dakota
Not every high-pressure line needs the same joint. The table below compares the connection classes Crestflo supplies into North Dakota, so specifiers can match pressure to method.
| Connection type | Typical pressure class | Sealing method | Best-fit North Dakota use |
|---|---|---|---|
| High-pressure compression | Up to standard tube-fitting rating | Hardened ferrule on tube OD | Bakken gauge, impulse and instrument hookups |
| Medium-pressure cone-and-thread | Up to ~20,000 psi class | Coned tube against collar, threaded gland | Gas-processing, NGL and injection skids |
| High-pressure cone-and-thread | Up to 30,000 psi | Coned-and-threaded gland & collar | Over-pressured upstream, SWD injection and syngas service |
| 37° flare (ISO 8434-2) | Up to 15,000 psi | Coned tube against 37° seat, threaded nut | Hydraulic and utility high-pressure lines |
Choosing the class is a rating-and-service decision. Our engineering team will confirm the connection and alloy against your line conditions.
Standards, Certifications & Proof
Crestflo carries ISO 9001 / 14001 / 45001 certification along with PED. Cone and thread fittings ship with approvals matched to the product type. For sour service, that means NACE MR0175 / ISO 15156 with controlled hardness. NPT threads follow ASME B1.20.1. Flare ends at 37° meet ISO 8434-2. Stainless and CRA feedstock comes from ASTM A269 / A276 / A479 stock, and every part carries material traceability.
Compression tube fittings go a step further. They're performance-qualified to ASTM F1387 for drop-in dimensional interchange with Swagelok® and Parker® envelopes. Swagelok® and Parker® remain trademarks of their respective owners; what's being claimed here is interchange or equivalence, not compatibility or intermix.
Certificate numbers live in our quality system. Check quality & traceability for those. As for testing, we run hydraulic proof, burst and impulse, pneumatic, and PMI on our products. Datasheets and CAD files go out to customers on request; we don't post them as public downloads.
US-Serving Manufacturer Supplying North Dakota: Lead Time & Logistics
Crestflo supplies cone and thread fittings to North Dakota, and the company is upfront about what that costs to ship. It's a US-serving manufacturer, not one based in North Dakota. The state itself is landlocked and sits deep in the interior, one of the most remote oilfield regions in the country, with no ocean port anywhere nearby. Crestflo keeps no US warehouse. Standard items sit as ready stock in India, while specials get made to order. From there, India-origin cargo crosses the ocean into the Port of Tacoma / Seattle, riding BNSF's northern transcontinental line, or into the Port of Houston. Either way it moves inland by rail on BNSF Railway, the Bakken's dominant carrier, then finishes the trip by truck to sites in Williston, Mandan, Dickinson and Beulah.
Honest lead time runs a 6–8 week build plus long ocean and inland-rail/truck transit. Even so, that's still well inside the 20+ week lead times typical of the majors on NACE, alloy and high-pressure items. For urgent Williston Basin, refinery or synfuels MRO, we air-freight critical line items and rail/truck the balance. North Dakota is a served area, not a local-stock location; we won't imply same-week or local delivery.
Cone and Thread Fittings for North Dakota: Products & RFQ
Whichever buyer path fits, every route ends in a quote. No dead ends.
End users, EPC contractors and panel fabricators: request a quote or a sample, and we'll help you match alloy and pressure class to your Bakken wellsite, gas-plant, refinery or synfuels service.
OEMs and equipment manufacturers: send a print for made-to-print cone and thread fittings, private label and kitting.
Distributors and master distributors: we're your North Dakota cone and thread fittings distributor and vendor. Ask for the line card and stocking-program terms.
To buy cone and thread fittings in North Dakota, or to source cone-and-thread fittings for sale to your Bakken, gas-processing, refinery or Beulah synfuels line, send an RFQ and we match alloy and pressure class to your service. Need to match existing hardware? We do not publish a part-number table, instead, request your Swagelok®/Parker® cross-reference from our engineering team and we will return the interchange. Request a quote for cone and thread fittings in North Dakota, or reach US sales at sales@crestflousa.com · +1 346 594 9005 (Houston, TX sales contact).
Why Crestflo
- 6–8 week lead time vs 20+ weeks typical for the majors on alloy, NACE and high-pressure items.
- Cone-and-thread ratings up to 30,000 psi for over-pressured Bakken upstream, SWD injection and syngas service.
- ASTM F1387 drop-in interchange on compression tube fittings, dimensional equivalence, imperial and metric.
SS + exotic alloys chosen for North Dakota service: 316L, Duplex 2205/2507 and Inconel 625/825 for sour Bakken and syngas work. For hyper-saline produced water, we specify Super Duplex 2507, 254 SMO, AL-6XN and Alloy 20. And for −40 °F winters plus cryogenic NGL, low-temperature-tough 316/316L does the job.
- Heat-number traceability + EN 10204 3.1/3.2 MTC on every part; 100% seat & shell leak-tested manifolds.
- Small MOQ + private label, made-to-print capability, and ISO 9001 / 14001 / 45001 & PED certification.
Crestflo is the instrumentation division of a four-decade Government-of-India-recognized export house with a track record of delivering across the Middle East. It's a US-serving cone and thread fittings company supplying North Dakota, not some locally based operation.
North Dakota Energy Clusters & Counties We Serve
| Cluster | Named facilities / operators | Counties / area |
|---|---|---|
| Bakken / Three Forks upstream | Continental Resources, Chord Energy, Chevron (Hess), Devon Energy, ConocoPhillips, ExxonMobil/XTO | Williams, McKenzie, Mountrail, Dunn |
| Gas gathering, processing & NGL | Tioga Gas Plant (Hess Midstream/Chevron), ONEOK (Garden Creek, Stateline, Bear Creek, Demicks Lake) | Williams, Dunn, McKenzie |
| Refining | Marathon Mandan Refinery, Marathon Dickinson renewable diesel | Morton, Stark |
| Coal-to-SNG gasification | Great Plains Synfuels Plant (Dakota Gasification) | Mercer |
North Dakota Cone and Thread Fittings FAQ
Do you stock cone and thread fittings in North Dakota (Williston, Dickinson or Mandan)?
No, Crestflo doesn't keep a US warehouse. Standard items sit as ready stock in India, while specials get made to order and delivered in roughly 6–8 weeks, plus whatever inland transit takes to reach your North Dakota site or distributor. That's still quicker than the 20-plus-week lead times you'll typically see from the majors on alloy and NACE items. North Dakota sits landlocked, deep in the interior, so containers route through the Port of Tacoma/Seattle or the Port of Houston and travel inland by rail on BNSF. It's a served area. Not a stock location.
Is there a cone and thread fittings supplier near me in North Dakota?
Crestflo works as your North Dakota cone and thread fittings supplier, but we cover the whole western energy corridor, Williston, Watford City, Dickinson, Mandan and Beulah, the way a US-serving supplier does, not a local storefront. Don't expect a Crestflo warehouse "near you" in North Dakota. We ship standard ready stock and made-to-order specials to your Williston Basin, refinery or synfuels site or distributor on roughly a 6–8 week build, plus inland transit. Want something closer to local stock? Ask about our distributor stocking programs.
Are your fittings and valves NACE MR0175 compliant for Bakken sour-gas and Beulah syngas service?
Yes, cone-and-thread fittings, valves and manifolds are available NACE MR0175 / ISO 15156 compliant with controlled hardness, heat-number traceability and EN 10204 3.1/3.2 MTC, in 316/316L, Duplex 2205/2507, Inconel 625, Incoloy 825 and Monel 400. H2S is documented and rising in parts of the Bakken, and it's inherent to coal-gasification syngas. We match the alloy to your measured service.
Which alloys handle Bakken produced-water and saltwater-disposal brine?
Zeron 100 (Super Duplex 2507), 254 SMO, AL-6XN, 904L and Alloy 20 all sit higher up the PREN scale. That extra corrosion resistance matters in Williston Basin brine, where TDS can hit roughly 400,000 mg/L, about ten times what seawater carries. Against chloride pitting and stress-corrosion cracking in that environment, these alloys hold up far better than 316L or 316.
Do your fittings hold up in −40 °F North Dakota winters and cryogenic NGL service?
316/316L austenitic stainless holds onto its toughness even at low and cryogenic temperatures, with no ductile-to-brittle transition. That's why it's the standard choice for cold-climate wellsite tubing, heat-traced impulse lines, cryo NGL sample lines and instrument manifolds.
What pressure can Crestflo cone and thread fittings hold?
Cone-and-thread fittings carry a rating of up to 30,000 psi, and medium- and high-pressure classes are rated per the applicable standard. We check the working-pressure class against your line conditions and alloy. Values follow the applicable standard, and they can be tailored to what you need.
Are your parts drop-in replacements for Swagelok or Parker on existing North Dakota panels?
Compression tube fittings offer dimensional interchange backed by ASTM F1387 performance qualification, both imperial and metric. Swagelok® and Parker® are trademarks of their respective owners; what we're offering is interchange, or equivalence, not "compatible" or "intermix." Request your cross-reference from our engineering team.
What's the real lead time to a Williston wellsite, the Mandan refinery, or the Beulah synfuels plant?
RFQ → ~6–8 weeks build, then ocean-plus-rail/truck transit into deep-interior North Dakota via the Port of Tacoma/Seattle or the Port of Houston and BNSF. Air-freight is available for critical items.
Do you sell to distributors or offer private label in North Dakota?
Yes, we support distributors and master distributors with a line card and stocking programs, and we handle OEMs through private-label and made-to-print cone and thread fittings. Reach out to US sales for terms.
Related Pages
- Cone-and-thread fittings hub, full specs and ordering codes
- High-pressure instrumentation fittings & valves and cone-and-thread vs compression
- North Dakota instrumentation fittings & valves, state overview
- Oil & gas instrumentation and midstream gas processing
- Alloys: Super Duplex 2507, Inconel 625, 316/316L