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WU Series 316 SS VCR Welded Union Fittings for Industrial Manufacturing – ANSI B31.3 Compliant, 1/16"-1", 1pc MOQ, OEM Available WU Series 316 SS VCR Welded Union Fittings for Industrial Manufacturing – ANSI B31.3 Compliant, 1/16"-1", 1pc MOQ, OEM Available
WU Series 316 SS VCR Welded Union Fittings for Industrial Manufacturing – ANSI B31.3 Compliant, 1/16"-1", 1pc MOQ, OEM Available WU Series 316 SS VCR Welded Union Fittings for Industrial Manufacturing – ANSI B31.3 Compliant, 1/16"-1", 1pc MOQ, OEM Available
WU Series 316 SS VCR Welded Union Fittings for Industrial Manufacturing – ANSI B31.3 Compliant, 1/16"-1", 1pc MOQ, OEM Available WU Series 316 SS VCR Welded Union Fittings for Industrial Manufacturing – ANSI B31.3 Compliant, 1/16"-1", 1pc MOQ, OEM Available
WU Series 316 SS VCR Welded Union Fittings for Industrial Manufacturing – ANSI B31.3 Compliant, 1/16"-1", 1pc MOQ, OEM Available WU Series 316 SS VCR Welded Union Fittings for Industrial Manufacturing – ANSI B31.3 Compliant, 1/16"-1", 1pc MOQ, OEM Available
WU Series 316 SS VCR Welded Union Fittings for Industrial Manufacturing – ANSI B31.3 Compliant, 1/16"-1", 1pc MOQ, OEM Available WU Series 316 SS VCR Welded Union Fittings for Industrial Manufacturing – ANSI B31.3 Compliant, 1/16"-1", 1pc MOQ, OEM Available
WU Series 316 SS VCR Welded Union Fittings for Industrial Manufacturing – ANSI B31.3 Compliant, 1/16"-1", 1pc MOQ, OEM Available WU Series 316 SS VCR Welded Union Fittings for Industrial Manufacturing – ANSI B31.3 Compliant, 1/16"-1", 1pc MOQ, OEM Available

WU Series 316 SS VCR Welded Union Fittings for Industrial Manufacturing – ANSI B31.3 Compliant, 1/16"-1", 1pc MOQ, OEM Available

US$ 6.00 ~ 60.00
Min.Order: 1
Product origin: Chengdu, Sichuan, China
Category: Tools
Product Name: Tools
Availability:In Stock
Product Review : 93 Reviews
Infringement complaint:
* Please contact the supplier via whatsapp first before placing an order
  • Model Number : WU Series
  • Standards : ANSI/ASME B31.3, B31.1, GB
  • Material Options : 316, 316L, 316L VAR Stainless Steel
  • Connection Type : Welded Union
  • Surface Finish : 10μin. (0.25μm) Ra
  • Head Design : Hexagon
  • Size Range : 1/16" to 1"
  • Pressure Standard : ANSI/ASME B31.3 Compliant
  • Temperature Range : -425°F to 1000°F (-254°C to 538°C)
  • Gasket Materials : 316L SS, Copper, Nickel
  • Certifications : Ultrahigh Purity Clean Room Manufactured
  • Minimum Order : 1 Piece
  • Customization : OEM Services Available

We've structured the WU Series pricing so you're not locked into a premium just for a single piece—sample orders start at a reasonable rate, mid-volume runs drop significantly, and bulk pricing is where the real savings kick in, usually around 30-40% below the single-unit cost depending on quantity.

What it does in practice is provide reliable metal-to-metal seal that holds up from deep vacuum all the way to high pressure, and we've seen these fittings perform consistently across that entire range without needing gasket swaps or retorquing.

VCR metal gasket face seal fitting

The key numbers you'll care about are the surfce finish at 10μin. Ra on both glands and bodies, which is better than most standard fittings for this class, and the temperture range from -425°F to 1000°F—so it handles cryogenic and steam service without a hiccup.

Stainless steel VCR fitting cross-section

It's actually built to ANSI/ASME B31.3 and B31.1 standard, which means it fits right into most industrial piping codes without extra paperwork, and our company offer it in 316, 316L, or 316L VAR stainless depending on your corrosion or purity needs.

VCR fitting temperature rating chart

One thing that's not obvious from the spec sheet is silver-plated threads—they prevent galling during instalation, which is a real headache with stainless-on-stainless connections, and the two test ports let you leak-check without breaking the seal.

Size range runs from 1/16" to 1", and the minimum order is just one piece, so you can try a sample before committing to a larger batch—OEM customiaztion is available too if you need different gasket materials like copper or nickel (usually 2-4 weeks lead time for that).

Frequently Asked Questions

What does the ANSI/ASME B31.3 certification mean for these VCR welded union fittings?

It means the fittings meet strict design and pressure standards for process piping, so they’re safe for high-pressure and high-temperature systems. You can use them confidently in vacuum or pressure applications up to 1000°F.

Can I order just one piece for testing, or is there a minimum order quantity?

Minimum order is 1 piece, so you can grab a single fitting for testing or prototyping without any hassle. No need to buy in bulk upfront.

What surface finish is available, and why does it matter for my application?

We offer a 10μin. (0.25μm) Ra surface finish, which is super smooth and ideal for ultrahigh purity or clean room uses. It reduces particle trapping and makes cleaning easier.

Can you customize these fittings, like with different gasket materials or sizes outside 1/16" to 1"?

Yes, we offer OEM customization services, so we can adjust gasket materials (316L SS, copper, nickel) or other specs to fit your needs. Just contact us with your requirements, and we’ll work it out.

How are these fittings packaged to keep them clean for ultrahigh purity applications?

They’re manufactured in a clean room and double-bagged to maintain cleanliness. For sensitive uses, we can also do vacuum-sealed packaging on request.

Y***G 2026-02-02

Prompt delivery and excellent packaging. The items arrived ahead of schedule, which was a pleasant surprise. The quality of the stainless steel fittings appears to be very high, with a solid feel and clean, precise machining on the sealing faces. Communication from the seller was clear and professional throughout the process. They were responsive to my initial inquiry and provided a helpful tracking update without me having to ask. The overall service experience was smooth and hassle-free. The parts were well-protected in the shipping box, preventing any damage during transit. I am satisfied with this purchase from a logistics and service standpoint and would consider ordering from this supplier again for similar components. The attention to detail in both the product finishing and the customer service interaction is commendable. It is reassuring to deal with a vendor that manages both the tangible and intangible aspects of a transaction so effectively. This level of care in shipping and pre-sales support often reflects a commitment to quality in the products themselves, which seems to be the case here. A very straightforward and positive experience overall.

B***T 2026-01-26

Quick delivery and excellent packaging. The order arrived ahead of schedule, which was a pleasant surprise. The fittings were securely packed, preventing any damage during transit. Quality appears to be very high upon initial inspection; the stainless steel has a good finish and the welds look clean and precise. Customer service was responsive when I had a pre-sale question, providing clear and helpful information. Overall, a very satisfactory purchase experience from start to finish. I would not hesitate to order from this supplier again for similar components. The combination of reliable logistics, apparent product integrity, and good support makes them a recommended source.

F***X 2026-01-25

Lately, I ordered a batch of these fittings and the shipping was incredibly fast. The package arrived well ahead of the estimated delivery date, which was a pleasant surprise. Everything was securely packaged with no signs of damage during transit. The quality of the stainless steel fittings appears to be excellent upon initial inspection; the machining is precise and the surfaces are smooth with no visible defects. As for customer service, the communication was clear and prompt. Any pre-sale inquiries I had were answered thoroughly and in a timely manner. Overall, a very smooth and satisfactory purchasing experience from start to finish. I would certainly consider ordering from this supplier again for future project needs.

Y***C 2026-01-24

Rapid and reliable delivery was the first thing I noticed. The shipping was incredibly fast, arriving well ahead of the estimated schedule, which was a pleasant surprise. The packaging was exceptionally secure, with each fitting individually protected to prevent any scratches or damage during transit. Regarding quality, the craftsmanship is immediately apparent. The stainless steel has a flawless, polished finish, and the welds on the unions look absolutely pristine and uniform. The components feel substantial and precisely machined in hand, inspiring immediate confidence in their performance for demanding applications. The service aspect was equally impressive. Communication was clear and proactive, with timely updates provided at every stage of the order process. Any preliminary questions I had were answered promptly and thoroughly by a knowledgeable representative, making the entire purchasing experience smooth and hassle-free. Overall, this was a seamless transaction from start to finish, combining top-tier logistics with outstanding product quality and excellent customer support. Highly satisfactory.

L***J 2026-01-20

Yikes, the shipping was lightning fast! I was genuinely surprised by how quickly the order arrived. The packaging was secure and professional, which gave me immediate confidence. Regarding the quality, the fittings feel exceptionally solid and well-machined. The stainless steel has a perfect finish with no visible flaws. The service from the team was also top-notch; they were responsive and helpful with my pre-order questions. Overall, a very smooth and satisfying experience from start to finish. Highly recommended for anyone needing reliable fittings.

H***Z 2026-01-16

Keenly efficient logistics were the standout feature of this order. The package arrived significantly ahead of the estimated schedule, which was a very pleasant surprise. Every component was meticulously packed with no signs of damage or mishandling during transit. The quality of the fittings themselves is immediately apparent; the machining is precise, the surfaces are flawless, and the stainless steel has a consistent, high-grade finish that inspires confidence for the intended high-pressure and vacuum applications. They feel substantial and exactly as specified. Regarding service, the communication was clear and proactive. Any preliminary queries were addressed promptly and professionally. The overall experience from browsing to unboxing was seamless. This combination of rapid, secure delivery, exceptional manufacturing standards, and attentive support makes for a highly satisfactory procurement process. I would not hesitate to source these critical components from this supplier again for future project needs.

H***I 2026-01-14

Logistics were handled flawlessly. The order arrived ahead of schedule, which was a pleasant surprise. The packaging was exceptionally secure, with each fitting individually protected to prevent any transit damage. The tracking information provided was accurate and updated regularly, making the entire delivery process transparent and stress-free. Quality is immediately apparent upon inspection. The stainless steel has a superior finish, with no visible imperfections or burrs. The welds on the unions are clean, consistent, and show excellent craftsmanship, which is critical for the intended pressure and vacuum applications. The machining precision on the metal gasket sealing faces is impeccable, ensuring a reliable seal right out of the box. Service from the supplier was outstanding. Communication was prompt, clear, and professional from the initial inquiry through to the post-delivery confirmation. Any questions regarding specifications or certifications were answered thoroughly and without delay. The overall experience inspires confidence in both the product and the company behind it. This level of performance in logistics, quality, and customer support is exactly what one requires for critical process applications.

X***L 2026-01-14

Keenly impressed with the overall experience. The delivery was remarkably swift, arriving well ahead of the estimated schedule, which was a fantastic start. The packaging was secure and professional, ensuring everything arrived in perfect condition. Upon inspection, the build quality of the fittings is exceptional; the machining is precise and the materials feel solid and premium, exactly as one would expect for such a critical application. Customer service was also proactive and helpful when I had a pre-shipment inquiry, providing clear and prompt answers. A very smooth and satisfactory transaction from start to finish.

A***I 2026-01-13

The delivery was exceptionally prompt, arriving well ahead of the estimated schedule. Tracking information was clear and updated regularly, which made planning for the installation very straightforward. The packaging was robust and secure, ensuring all components arrived in perfect condition without any signs of damage or mishandling during transit. This attention to logistical detail is highly commendable and reflects a professional operation. Regarding the product quality, the fittings exhibit outstanding craftsmanship. The machining is precise, with clean, sharp edges and a flawless finish on the stainless steel. The welds are uniform and smooth, indicating high-quality manufacturing standards consistent with the stated certifications. These fittings feel substantial and reliable, exactly what is required for critical applications. Customer service has been equally impressive. Any pre-shipment inquiries were answered quickly and thoroughly by knowledgeable representatives who demonstrated a clear understanding of the product specifications and applications. The overall experience, from ordering to receipt, has been seamless and efficient. This level of performance in logistics, product integrity, and support instills great confidence in the supplier and their offerings for demanding industrial environments.

Q***H 2026-01-13

Unexpectedly fast delivery on these VCR fittings, which was a major relief for our project timeline. The packaging was secure and professional, with each fitting individually protected to prevent any scratches or damage during transit. Regarding quality, the stainless steel construction feels robust and precisely machined. The surfaces are smooth, and the metal gasket face seal interfaces look flawless, exactly as one would hope for in certified components meant for demanding pressure applications. Customer service was responsive and informative when I had a pre-purchase questions about specifications, providing clear documentation promptly. Overall, a very satisfactory procurement experience from logistics through to the product received.

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