Custom OEM & ODM CNC Machining Service for Carbon Steel and Stainless Steel Pipe Fittings

In industrial fluid systems, pipe fittings are not off-the-shelf commodities. For OEM equipement manufacturers and system integrators, material selection, thread accuracy, machining tolerance, and production consistency directly affect system safety and long-term performance.

Yuhuan Hongqian specializes in custom OEM and ODM CNC machining services for carbon steel and stainless steel pipe fittings,we mainly supply for Australia, Europe, the United States, Latin America, and Russia. With a minimum order quantity starting from 2,000 pieces, we focus on stable batch production, precise threading, and reliable repeatability for long-term OEM CNC programs.

This article explains our materials, thread standards, machining capability, quality control process, and how we support global customers with customized CNC pipe fittings.

What Are Custom CNC Machined Pipe Fittings?

Custom cnc machined pipe fittings means customer can provide the detail demand for pipe fitting , like material , surface treatment , roughness of surface , hardness detail demand etc . Then we prodece based on your demand to provide approved products.

custom CNC machined pipe fittings are produced according to:

• Customer drawings

• Samples

• Specified material grades

• Local thread standards

• Application-specific tolerances

At Yuhuan Hongqian, all pipe fittings are CNC turned, ensuring consistent geometry, clean thread profiles, and controlled tolerances suitable for industrial use.

Types of Pipe Fittings We Manufacture

Our CNC machining service covers a wide range of custom pipe fittings, including:

• Elbow fittings

• Tee fittings

• Couplings

• Adapter fittings

• Threaded nipples

• Plugs and caps

These fittings are widely used in hydraulic systems, pneumatic systems, industrial machinery, fluid transfer equipment, and auxiliary oil & gas systems.

if you have other pipe fitting , hydraulic fitting project , you can also send us drawing to check if we could produce or not .

Carbon Steel Materials for Pipe Fittings

Carbon steel remains the most widely used material for pipe fittings due to its strength, machinability, and cost efficiency.

Carbon steel is classified into low-carbon steel, medium-carbon steel, and alloy steel.

We commonly machine the following grades:

Advantages

• Stable chemical composition

• Good toughness

• Excellent CNC machinability

• Suitable for threaded fittings

Free-Cutting Steel for High-Volume Production

For large OEM orders, we also offer:

These grades are ideal for MOQ ≥ 2,000 pcs, ensuring high output with consistent thread quality.

Stainless Steel Materials for Pipe Fittings

Stainless steel pipe fittings are selected for corrosion resistance, cleanliness, and durability.

Austenitic Stainless Steel Grades

We machine the following stainless steels:

Stainless steel fittings can be supplied with polished or passivated surfaces upon request.

Thread Standards We Can Machine

Thread accuracy is critical for sealing performance and assembly compatibility. All threads are CNC machined and inspected using GO / NO-GO gauges.

Pipe Thread Types

• NPT

• Nominal Size (NPS)	Threads per Inch (TPI)	Major Diameter (OD)	Pitch Diameter (PD)	Minor Diameter (ID)	Taper	Pitch (P)
  1/8"	27	10.242 mm	9.489 mm	8.737 mm	1:16	0.941 mm
  1/4"	18	13.616 mm	12.487 mm	11.358 mm	1:16	1.411 mm
  3/8"	18	17.055 mm	15.926 mm	14.797 mm	1:16	1.411 mm
  1/2"	14	21.223 mm	19.772 mm	18.321 mm	1:16	1.814 mm
  3/4"	14	26.569 mm	25.117 mm	23.666 mm	1:16	1.814 mm
  1"	11.5	33.227 mm	31.461 mm	29.694 mm	1:16	2.209 mm
  1-1/4"	11.5	41.984 mm	40.218 mm	38.451 mm	1:16	2.209 mm
  2"	11.5	60.091 mm	58.325 mm	56.558 mm	1:16	2.209 mm
  2-1/2"	8	72.699 mm	70.159 mm	67.619 mm	1:16	3.175 mm
  3"	8	88.608 mm	86.068 mm	83.528 mm	1:16	3.175 mm

• NPTF

• BSPT

• BSPP (BSP)

Unified Inch Threads

• UNF

• UNEF

• JIC Size	Thread Size (inches)	Threads Per Inch (TPI)	Dash Size	Tap Drill Size (inches)	Flare Diameter (inches)
  1/8″	5/16-24 UNF	24	-2	0.272	0.184
  3/16″	3/8-24 UNF	24	-3	0.332	0.250
  1/4″	7/16-20 UNF	20	-4	0.391	0.313
  5/16″	1/2-20 UNF	20	-5	0.453	0.391
  3/8″	9/16-18 UNF	18	-6	0.510	0.469
  1/2″	3/4-16 UNF	16	-8	0.682	0.625
  5/8″	7/8-14 UNF	14	-10	0.810	0.750
  3/4″	1 1/16-12 UNF	12	-12	0.955	0.938
  1″	1 5/16-12 UNF	12	-16	1.195	1.188
  1 1/4″	1 5/8-12 UNF	12	-20	1.535	1.469
  1 1/2″	1 7/8-12 UNF	12	-24	1.776	1.750
  2″	2 1/2-12 UNF	12	-32	2.276	2.406

• UNS

Metric Threads

• ISO Metric threads

We regularly machine threads according to UK, European, American, and Australian standards, ensuring compatibility with local systems.

CNC Machining Tolerance Capability

Precision is a core requirement for OEM pipe fittings.

• Standard machining tolerance: ±0.02 mm

• Thread profiles controlled to relevant standards

• Stable repeatability for batch production

Our CNC turning process ensures that tolerances of 0.02 mm can be consistently achieved, meeting the requirements of most industrial pipe fitting applications.

OEM & ODM CNC Machining Services

We support both OEM and ODM cooperation models.

OEM CNC Machining

• Manufacture strictly according to customer drawings or samples

• Material compliance and dimensional control

• Stable quality for repeat orders

ODM Support

• Design optimization suggestions

• Material selection guidance

• Machining-friendly structural improvements

Our minimum order quantity is 2,000 pieces, optimized for medium to large batch production.

CNC Equipment & Production Capacity

Located in Yuhuan, a well-known machining hub, Hongqian operates modern CNC equipment for pipe fitting production.

Machining Capability

• CNC lathes for precision turning

• Automatic lathes for high-volume output

• Secondary drilling and machining processes

Production Strength

• Consistent dimensional control

• Clean and accurate threads

• Reliable delivery for long-term OEM customers

Surface Treatment & Finishing Options

Depending on application requirements, we offer various surface treatments:

Surface treatment can be customized based on corrosion resistance and appearance requirements.

Quality Control Process

Quality control is integrated throughout production:

• Incoming material inspection

• In-process dimensional checks

• Thread gauge inspection

• Final visual inspection

Material certificates and inspection records can be provided upon request to support OEM documentation needs.

Applications of Our Pipe Fittings

Our custom CNC machined pipe fittings are used in:

• Hydraulic systems

• Pneumatic systems

• Industrial machinery

• Fluid transfer equipment

• OEM equipment manufacturing

Why Customers Choose Yuhuan Hongqian

Global customers choose us because we offer:

• Focus on custom CNC pipe fittings only

• Strong experience with UK, EU, US, and Australian standards

• Stable production starting from 2,000 pcs MOQ

• Carbon steel and stainless steel specialization

• Reliable tolerance control and thread accuracy

Frequently Asked Questions (FAQ)

What is your minimum order quantity for custom pipe fittings?

Our standard MOQ is 2,000 pieces, suitable for OEM and long-term production programs.

What machining tolerance can you achieve?

We can consistently achieve ±0.02 mm tolerance for CNC machined pipe fittings.

Can you machine both NPT and BSP threads?

Yes. We machine NPT, NPTF, BSPT, BSPP,UNF, UNS as well as UN and metric threads.

Do you support OEM and ODM projects?

Yes. We support OEM/ODM cnc machine service , professional supply pipe fitting , hydraulic fitting  with different mateiral . Carbon steel and stainless steel material .

Which markets do you mainly serve?

Our customers are mainly located in the UK, Australia, Europe, the United States, Latin America, and Russia.

Conclusion

Choosing the right CNC machining partner is essential for reliable pipe fitting performance. With strong expertise in carbon steel and stainless steel materials, precise thread machining, and stable production capability, Yuhuan Hongqian provides dependable OEM and ODM CNC machining services for custom pipe fittings.

If you are looking for a long-term manufacturing partner, feel free to send us your drawings or samples for evaluation.