Inner Angled Union

Inner Angled Union

Inner Angled Union Fittings are engineered for high-density fluid manifolds, hydraulic valve blocks, pneumatic control systems, and instrumentation panels where directional changes are required in confined installation spaces. Featuring an optimized angled internal flow channel, these fittings reduce pressure drop, minimize flow turbulence, and eliminate the need for secondary adapter stacks.
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Product Introduction

Inner Angled Union Fittings are engineered for high-density fluid manifolds, hydraulic valve blocks, pneumatic control systems, and instrumentation panels where directional changes are required in confined installation spaces. Featuring an optimized angled internal flow channel, these fittings reduce pressure drop, minimize flow turbulence, and eliminate the need for secondary adapter stacks.


Manufactured via precision CNC turning and multi-axis milling, our angled unions deliver tight thread pitch tolerances, burr-free internal bores, and smooth sealing seats for stable, leak-free operation under high-pressure and high-vibration conditions.

 

Technical Specifications

 

Parameter

Specifications & Capabilities

Tube / Pipe Sizes

Metric: 6 mm to 42 mm O.D. | Imperial: 1/8" to 1-1/2" Tube/Pipe

Thread Standards

BSPP (ISO 228-1), BSPT (ISO 7-1), NPT (ANSI B1.20.1), Metric (ISO 6149 / DIN 3852), SAE ORB

Pressure Ratings

Up to 400 Bar (5,800 PSI) for Carbon Steel/Stainless; Up to 200 Bar for Brass (size dependent)

Materials

Carbon Steel (12L14, 1045), Stainless Steel 304, 316/316L, Brass (C36000 / HPb59-1)

Surface Treatments

Trivalent Zinc Plated (Cr3+), Zinc-Nickel (720h+ Salt Spray test ASTM B117), Passivated, Electropolished

Internal Bore Finish

Cross-hole deburred; Flow channel roughness ≤ Ra 0.8 µm

Thread Tolerance

Class 2A/2B (NPT/SAE), 6H/6g (Metric), ISO 228 Class A (BSPP)

Compliance

ISO 9001:2015, RoHS, REACH, EN 10204 3.1 Material Test Reports (MTR) available

 

Key Performance Advantages

 

Flow-Optimized Internal Geometry: Smooth internal transitions replace sharp 90° intersections, reducing fluid friction, head loss, and pressure spikes in mobile and stationary hydraulics.


Compact Routing Profile: Allows directional tubing changes directly within the union body, saving up to 40% envelope space compared to standard straight union + elbow adapter assemblies.


Precision Cross-Bore Deburring: Every angled internal passage is 100% deburred and ultrasonic cleaned to prevent loose metal shavings from entering hydraulic pumps or proportional valves.


Reliable Zero-Leakage Sealing: Available in multiple sealing interfaces:


Metal-to-Metal Sealing Cone (37° JIC / 24° DIN Cone)


Elastomeric Sealing (O-ring boss, bonded seals)


Tapered Thread Interference (NPT / BSPT)

 

Material & Operating Environment Guide


Carbon Steel (12L14 / 1045)

Applications: Standard high-pressure industrial hydraulic power units, mobile machinery, construction equipment.
Finish: Trivalent Zinc (Cr3+) or Zinc-Nickel alloy coating providing corrosion protection against hydraulic oils, humidity, and mild atmospheric exposure.

 

Stainless Steel 304

Applications: Food and beverage processing lines, water treatment, general industrial chemical washdown areas.

Finish: Passivated surface for superior oxidation and atmospheric corrosion resistance.

 

Stainless Steel 316 / 316L

Applications: Marine hydraulics, offshore oil & gas, chemical processing manifolds, and outdoor coastal installations.
Features: Molybdenum-bearing alloy delivering maximum resistance to chloride pitting, acidic media, and salt spray exposure.

 

Brass (C36000)

Applications: Pneumatic logic panels, compressed air lines, low-pressure lubrication systems, and instrumentation circuits.

Features: Non-sparking, excellent machinability, and inherent rust resistance.

 

Quality Assurance & Traceability


We enforce a rigorous quality control framework from raw bar stock to final shipping:

 

Spectrometric Material Verification: All raw materials undergo Optical Emission Spectrometry (OES) testing. EN 10204 3.1 Material Test Reports (MTRs) are archived per heat number for complete material traceability.


100% Thread Inspection: Threads are checked using calibrated Go / No-Go pitch gauges to prevent cross-threading and loose engagement during equipment assembly.


Internal Bore & Surface Inspection: Bore dimensions and sealing seats are verified using optical comparators and surface roughness testers (Ra ≤ 0.8 µm).


Ultrasonic Cleaning & Protective Packaging: Components are degreased, fitted with plastic protective thread caps, packed in inner grid boxes, and sealed in export-grade cartons to eliminate ocean transit damage.

 

OEM & Custom Manufacturing Capabilities


We support equipment builders, manifold designers, and industrial distributors with tailored OEM solutions:

 

Non-standard thread combinations (e.g., Metric to NPT / BSPP to SAE jump sizes).


Custom port angles, wall thicknesses, and hex body dimensions according to CAD models.


Pre-applied thread sealants or anti-galling coatings.


Permanent laser engraving (part numbers, thread size markings, company logos).


Customized poly-bagging, barcode labeling, and retail packaging.

 

FAQ

 

Q: What is your Minimum Order Quantity (MOQ)?

A: For standard sizes (zinc-plated steel / stainless steel BSPP, NPT, Metric), our standard MOQ is 100 pieces. For custom drawings or non-standard jump sizes, MOQ starts at 500 pieces.

Q: Can you supply Material Test Reports (MTRs) with the shipment?

A: Yes. We provide EN 10204 3.1 Material Test Reports (MTRs), dimensional inspection sheets, and RoHS/REACH certificates with every batch upon request.

Q: Do you offer free samples for testing and fitting validation?

A: Yes. Standard samples are provided free of charge. Buyers are only responsible for the courier shipping fee (DHL / FedEx / UPS).

Q: What is your standard production lead time?

A: In-Stock Items / Standard Fittings: Dispatched within 3–5 business days.
Standard Mass Production: 15–20 calendar days.
Custom OEM Machining / Special Plating: 25–30 calendar days.

Q: How do you prevent thread damage during international shipping?

A: All external threads are fitted with plastic protective caps. Individual parts are packaged in grid-separated inner boxes, packed into reinforced outer cartons, and palletized with stretch wrapping.

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