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Supplier: SHENZHEN BENXIN ELECTRONIC HARDWARE CO., LTD.

1. Product Introduction

1.1 Overview

We supply high-precision small inner diameter food-grade stainless steel tubes in grades 304 and 316, engineered for applications where hygiene, dimensional accuracy, and surface quality are critical. Manufactured from selected stainless steel raw material and processed through precision machining lines, our tubes feature thin, uniform walls, smooth inner and outer surfaces, and excellent corrosion resistance — making them a reliable choice for medical, industrial, and consumer products.

Every tube is produced with tight dimensional control and consistent wall thickness, and can be customized in outer diameter, wall thickness, and length to match your design and application requirements. Whether you need standard sizes in volume or fully customized specifications, we deliver parts that meet your drawing and tolerance needs.

1.2 Material Grades

Grade	Features	Typical Use
304	Excellent corrosion resistance, good formability and weldability, cost-effective	General food contact, industrial tubing, consumer products
316	Added molybdenum for superior resistance to chlorides, acids, and saline environments	Medical instruments, pharmaceutical and chemical environments, marine/high-corrosion applications
304L / 316L (on request)	Low-carbon variants with improved weldability	Welded assemblies and heavy fabrication

Both grades offer the clean, non-toxic, easy-to-clean characteristics required for food-grade and medical-grade applications. Food contact safety, hygiene, and long service life are the foundations of our product quality.

1.3 Key Features

• Small inner diameter design — precision ID control for flow, fit, and insertion applications
• Food-grade hygienic quality — non-toxic material, smooth surfaces that resist bacteria build-up and residue
• Smooth inner & outer surfaces — low surface roughness, easy to clean and sterilize
• Excellent corrosion resistance — long-term performance in wet, acidic, saline, and high-temperature conditions
• High dimensional accuracy — consistent OD, ID, and wall thickness from piece to piece
• Fully customizable — OD, wall thickness, length, surface finish, and end processing per your drawing
• Volume production capability — in-house CNC machining lines ensure stable quality at scale

1.4 Specifications (Indicative Range — Confirm Your Exact Specs With Us)

Parameter	Typical Range	Notes
Outer Diameter (OD)	3.0 – 30.0 mm	Customizable
Wall Thickness (WT)	0.3 – 2.0 mm	Uniform wall control
Inner Diameter (ID)	Small-ID design (ID = OD − 2 × WT)	Precision internal dimensions
Length	Cut-to-length, custom	Standard or custom cutting
Grades	304 / 316 (304L / 316L available)	Per order requirement
Surface	Bright annealed (BA) / mirror polished	Inner & outer surfaces
Tolerance	Precision grade	Tolerance per order agreement
Reference standards	GB/T 14976, ASTM A269, etc.	Executed per order requirements

Please contact us with your required OD, wall thickness, length, and quantity — we will confirm exact specifications and tolerances for your application.

1.5 Surface Treatment & End Processing

• Bright annealed (BA) surface for a clean, smooth finish
• Mirror polishing on request for maximum surface smoothness
• Deburring and chamfering of tube ends for safe handling and reliable assembly
• Clean packaging to keep surfaces scratch-free during transport

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2. Process Introduction

Our tubes and precision components are produced through a complete in-house manufacturing chain — from raw material inspection to finished, inspected parts. Our workshop is equipped with CNC machining lines and full sheet metal fabrication capabilities.

2.1 CNC Precision Machining

CNC machining is the core of our manufacturing capability:

• CNC turning — precise OD/ID turning and profiling of tube ends and cylindrical parts
• CNC milling — slots, holes, flats, and complex geometries on components
• Drilling, tapping & threading — accurate hole positions and thread quality
• Chamfering & deburring — clean edges, burr-free surfaces ready for assembly

CNC machining gives us repeatable dimensional accuracy, tight tolerances, and the flexibility to handle both prototypes and volume production.

2.2 Sheet Metal Fabrication

In addition to CNC machining, we provide complete sheet metal fabrication services:

• Laser / CNC cutting — precise cutting of sheets and plates
• CNC bending — accurate bends with consistent angles
• Stamping & forming — enclosures, brackets, covers, and chassis parts
• Welding — clean, reliable welds for assemblies and frames
• Surface treatment — powder coating, polishing, and passivation to protect and finish parts

This makes us a one-stop partner for metal components and assemblies — from small precision parts to sheet metal enclosures and structural frames.

2.3 Tube Production Flow

Our stainless steel tube line follows a controlled production sequence:

1. Raw material inspection — incoming material checked for grade, dimension, and surface quality
2. Precision cutting — tubes cut to length with clean, square ends
3. End processing — chamfering and deburring for safe, assembly-ready ends
4. Surface processing — bright annealing / polishing to achieve the required surface finish
5. Cleaning — degreasing and cleaning to remove processing residue
6. Final inspection — dimensional checks, surface quality inspection, and count verification
7. Packaging & delivery — protective packaging to prevent damage and contamination

2.4 Quality Control

• Dimensional inspection — OD, ID, wall thickness, and length verified against order requirements
• Surface inspection — visual and touch-check for scratches, pits, and defects
• Batch traceability — each order inspected and controlled through the production flow
• Custom inspection items — additional tests (e.g., cleanliness, mechanical properties) available on request

We build quality into the process — not just the final check — so you receive consistent parts, order after order.

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3. Application Scenarios

Small inner diameter food-grade stainless steel tubes serve three major application fields: medical, industrial, and consumer. In each field, the same material qualities — hygiene, corrosion resistance, and precision — deliver reliable performance.

3.1 Medical Applications

In medical and healthcare equipment, material safety and dimensional precision are non-negotiable.

• Precision medical instruments — components of surgical and diagnostic instruments
• Puncture / cannula-type parts — thin-walled tubes with precise ID for fluid and instrument passage
• Dental instruments — small-diameter tubes for dental handpieces and tools
• Medical device tubing — instrument lines, housings, and structural sleeves
• Laboratory & pharmaceutical equipment — corrosion-resistant, cleanable tubing

Why stainless steel tubes fit: non-toxic, sterilizable, corrosion-resistant, and dimensionally precise — meeting the strict hygiene requirements of the healthcare industry.

3.2 Industrial Applications

Industrial environments demand tubes that withstand pressure, corrosion, temperature, and continuous operation.

• Instrumentation & gauge lines — precise small-ID tubing for pressure and flow measurement
• Pneumatic & hydraulic lines — reliable fluid and air transmission
• Sensor housings & probes — protective and structural sleeves for sensing elements
• Heat exchanger & condenser tubes — efficient, corrosion-resistant heat transfer
• Food & beverage processing machinery — hygienic piping and components
• Chemical & pharmaceutical equipment — tubes that resist aggressive media

Why stainless steel tubes fit: 304/316 stainless steel offers the strength, corrosion resistance, and dimensional stability required for long-life industrial service.

3.3 Consumer Applications

For everyday consumer products, appearance, safety, and cleanability matter as much as performance.

• Food-grade drinking straws — reusable, hygienic, and durable alternatives to plastic
• Coffee stirrers & bar tools — elegant polished finish for cafes and home use
• Thermos / water bottle inner tubes — corrosion-resistant, food-contact-safe
• Kitchenware & utensils — stirring, dispensing, and handling components
• Beauty & care tools — fine, precise tube components for personal care products

Why stainless steel tubes fit: food-contact-safe material, smooth polished surfaces, easy to clean, and an attractive premium appearance.

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4. About the Company — SHENZHEN BENXIN ELECTRONIC HARDWARE CO., LTD.

Shenzhen Benxin Electronic Hardware Co., Ltd. is a manufacturing company based in Shenzhen, China, specializing in CNC precision machining and sheet metal fabrication.

Our Core Business

Capability	What We Do
CNC Machining	CNC turning, milling, drilling, tapping, and precision component production for a wide range of industries
Sheet Metal Fabrication	Laser/CNC cutting, bending, stamping, welding, and surface treatment for enclosures, brackets, frames, and assemblies

Why Work With Benxin

• One-stop metal manufacturing — precision machining and sheet metal fabrication under one roof, from small parts to complete assemblies
• In-house CNC machining lines — stable quality and capacity for both prototyping and mass production
• Custom manufacturing (OEM/ODM) — we work from your drawings and samples to produce parts that meet your exact requirements
• Quality-focused process — controlled production flow with dimensional and surface inspection before delivery
• Flexible production — small batches to high-volume orders, with consistent quality
• Professional export experience — serving customers worldwide with reliable communication and on-time delivery

Our Commitment

We are not just a parts supplier — we are a manufacturing partner. From material selection and process planning to surface treatment and packaging, we work closely with our customers to deliver components that perform reliably in their products. Tell us your drawing, your application, or your idea — we will turn it into precision-made reality.

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Contact us today for a quote on 304/316 small inner diameter stainless steel tubes, CNC machined parts, or sheet metal fabrication. Your specifications are welcome.