Nickel Tube / Nickel Pipe-Seamless nickel tubing Manufacturers & Suppliers

Nickel Tube is widely used in various industries where high corrosion resistance, high strength and/or high temperature resistance is required. Younglee’s Tubing factory can manufacture and supply high quality seamless nickel tubes and pipes with sizes OD 6mm- 76mm, and wide range of materials, including famous nickel alloy grades such as inconel tubing (inconel 600, inconel 718, inconel 625 tubing, … ), monel tubing (monel 400), and incoloy tubing (incoloy 825). 

Advantages of Nickel Tube

Nickel alloys can provide a combination of high corrosion resistance, high strength, and good metallurgical stability and weldability. 

  • Many nickel alloys provide excellent heat resistance, making Nickel alloy tubes  an ideal option for applications where requiring integrity at elevated temperatures. High temperature heat resistant nickel pipe is ideal for the aerospace, oil & gas, aircraft, defense and power generation industries.
  • Nickel tube can perform excellent corrosion resistance in both aqueous and high-temperature applications.
  • Nickel pipes can be supplied with very thin wall-thickness, for the good ductile performance.
  • Nickel tubes can be electroplated and are easily welded, making them suitable for applications in various fields where very high and low temperatures come into play.

Control Line Tubes in stainless steel or nickle alloy for Downhole and Subsea

Control Line Tube Brief Introduction

Control line tubes and chemical injection lines usually are coiled tubes made of stainless steel, duplex stainless steel or nickle alloys. There are three main forms, including welded & redrawn tube, welded and floating plug redrawn and seamless tube. 

Control line tubing is widely used in applications as 

  • Downhole hydraulic control lines
  • Downhole chemical control lines
  • Subsea control lines for hydraulic power and chemical injection lines
  • Flowline control
  • Instrumentation
  • Smooth inner surface control lines used in fibre optic applications

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Stainless steel tubing for pure gas delivery | Stainless Steel Gas Lines

Stainless steel gas tube for pure gas lines mostly are stainless steel bright annealed tubes or stainless steel mechanical polished tubes. And for ultra high purity gas tubing, people will usually use electropolished stainless steel tubing (EP tubes).

Younglee’s precision steel tube factory manufactures and supplies a wide range of stainless steel gas tubes for gas delivery (gas convey) and gas distribution, especially designed for high purity gas convey systems. 


Our stainless steel gas tubing is produced according to ASTM A 269, A270, A632, or EN ISO standard EN 10216-5.

Materials of stainless steel gas tube

Mostly the most popular material of stainless gas tube is AISI 316L, because 316L stainless steel tubing has stable composition and high performance of corrosion resistance, which greatly ensure the purity of the gas in the tubing.

Besides 316L stainless steel tubing, we also manufactures stainless steel high purity tubing in materials of 304 / 304L, 316 Ti, 321 /321H and so on. 
Besides ASTM standards, we also produce pure gas tubing in stainless steel grades according to EN standard as 1.4401 /1.4404, 1.4301/1.4307, 1.4541, 1.4571 etc.

High Purity Stainless Steel Tube Sizes

We produce and supply stainless steel pure tubes in metric sizes and imperial sizes. The size range of our high performance stainless steel tubing is O.D 5 mm to O.D 50.8 mm.

Inch Stainless steel tubing sizes chart

Size (inch)O.D.(Inch)Wall thickness (inch)Maximum Safe Working Pressure Rate
PSI Bar 

We also supply other stainless steel tubing sizes upon customer’s request.

Metric mm stainless steel tube sizes chart

O.D.(mm)Wall thickness (mm)O.D.(mm)Wall thickness (mm)

Surface Finishing & Surface Roughness

 Younglee’s supplies stainless steel gas tubing in below three surface finish upon customers’ requirements.

·  Bright annealed (BA tube)

Bright annealed stainless steel tubing is supplied with bright inner surface and outer surface. The surface roughness of tube inner can be Ra 0.3 μm to 0.8 μm upon customers’ request.

·  Mechanical polished 

Inner mechanical polished tubing is supplied with surface roughness max. Ra 0.6 μm.

·  Electropolished (EP tube)

Electropolishing stainless steel tubing is mostly used as ultra high purity stainless steel tubing. The roughness of EP tube can be as good as surface roughness Ra 0.2 μm.


In various industries, when pure gas delivery or pure gas distribution is needed, people will mostly use stainless steel gas tubing. For example, when building a biology lab or a chemical laboratory, normally people will need stainless steel tubes to build the laboratory gas lines, these tubes are known as lab supply gas tubing. The application industrial fields including below.

  • Laboratory engineering: Lab gas lines, Lab gas tubes
  • Semiconductor industry: 

HOOK-UP BA tube, HOOK-UP EP tube, HOOK-UP stainless steel tube, HOOK-UP CDA stainless steel tubes.

  • Pharmaceuticals
  • High purity gas industry
  • Food & Beverage industry
  • Bulk Gas industry
  • Fine Chemical industry
  • Precision Instruments
  • CDA industry
  • Special gas industries



High Purity Stainless Steel Tubing | High Purity Gas Tube

High Purity Stainless Steel Tubing | High Purity Gas Tube | High Purity Pipe Fittings

High purity stainless steel tubing is widely used in various industries where high purity, high cleanliness, and high performance are critical required, such as semiconductor industry, sports, pharmaceuticals, laboratory engineering, high purity gas industry, and more. As mostly this kind of tubing is mostly used to deliver various kinds of high purity gas for different applications, it is also known as high purity gas tubing as well.

As one of the top quality China precision stainless steel tube manufacturers, Younglee produces and supplies high purity tubes in a wide range of metric sizes and imperial sizes. Our customers include many respected companies in China & oversea countries.

Details of high purity stainless steel tubing

Ultra High purity stainless steel tubing


We produce and supply high purity tubing in stainless steel of EN DIN steel grades and AISI /UNS steel grades.

AISI / UNS steel grades: 316 / 316L, 304 / 304 L, 316Ti, 2205, S31803

EN DIN steel grades: 1. 4401 / 1.4404 /1.4435, 1.4301 /1.4307, 1.4462

316L high purity tubing is the most popular, also we produce other materials of high purity tubes on customer’s requests.

Size Range:

Tubing metric size: O.D 6 mm to O.D 120 mm, W.T 0.5 mm to 10 mm

Imperial size tubes: O.D 1/4″ to 6″

The most popular size range of the high purity stainless steel tubing is between O.D 6 mm (1/4″) to O.D 50 mm (2″), and we can supply the high purity tubes with random length or fixed length 1 meter to 8 meters.

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Chrome plated tube / Chrome plated pipe for hydraulic piston rod

Chrome plated tube general introduction

Chrome plated tube, chrome plated steel bar and honed cylinder tube are the main materials for manufacturing hydraulic cylinders. As hydraulic cylinders are widely used in various kinds of machines and equipment, these three products are widely used in modern industries.

Chrome plated tube is known as chrome plated hollow bar or chrome plated hollow steel in some industries. This product usually is made of seamless steel tubes or seamless hollow bar, by precision polishing on outside diameter and with a certain thickness of chrome plated layer on outside diameter, so they are called chrome plated OD tube also.

The chrome plated surface provides excellent wear and corrosion resistant performance of the tube. Chrome plated steel tubing has an excellent durability and helps reducing friction. Chrome plated pipe is mostly used as hydraulic piston rods in order to have a lighter hydraulic cylinder. And chrome plated OD tube also can be utilized for applications where precision outside diameter or high smooth outside surface is  required. Chrome plated OD tubes can be supplied with honed inside surface for telescoping hydraulic cylinder applications too.

Chrome-plated-tube, chrome plated hollow bar

Materials of our chrome plated tubes

Our chrome plated pipes are produced from first class quality carbon steel seamless tubes or hollow bar. The steel grades available in SAE 1020, SAE 1026, SAE1045, St 52, St37.4 and so on.

Size Range

Our chrome plated tubes / chrome plated hollow bar is available in size range of O.D: 15 mm to 609 mm, with W.T 1 mm to 40 mm.

We also produce and supply imperial size chrome plated pipes.


Our chrome plated tubes / pipes can be supplied with length up to 14 meters, fixed length and random length are available on customers’ request.

Chrome plated tube outside diameter size tolerance

The Outside diameter tolerance of our chrome plate tube can be as precise as ISO h7, and we can supply with other tolerance on customers’ request.

Surface of Chrome plate tube / chrome plated hollow bar

Normally the outside diameter surface roughness of our chrome plated tubing is below Ra 0.4 microns. And the thickness of the chrome plated layer can be from 10 microns to 30 microns on customers’ request. The most popular requirement of chrome plate layer thickness is Min. 20 microns.

Chrome plate tube / chrome plated hollow bar manufacturer and supplier

The honed tube factory of Younglee is also the high quality chrome plated tube manufacturer and supplier. Every year our factory manufactures more than 5000 metric tons of various sizes of chrome plate tubes and hollow bars. We had supplied our chrome plated tubes to many countries such as USA, Canada, Vietnam, Saudi Arabia, Colombia, South Africa, Brazil, Australia, Thailand and so on.

Customers who want to buy chrome plated tubes/ chrome plated pipes, please contact us by email or phone.


Hydraulic cylinder tubes | Honed Tube Factory Supplier of China

Hydraulic cylinder tube is one typical application type of honed tube. This product is made from cold drawn seamless steel tube (CDS tube), by the process of honing or Skiving & Roller Burnishing (SRB for short) on the inside surface. It is widely used to manufacture hydraulic cylinders, so it is known as hydraulic cylinder tube.

As the most experienced hydraulic cylinder tube supplier and manufacturer, we can understand the requirements of our customers accurately, and we can give our suggestions to our customers to help them to choose the right materials and the hydraulic cylinder tube sizes.


We guarantee you to receive the top quality honed cylinder tubing that you require, at the specific specifications you need.

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SAE flanges /hydraulic SAE flanges-hot products

SAE flanges | Code 61 flange /code 62 flanges

SAE flanges / hydraulic SAE flanges are the main product of Younglee group’s factory also.  The products are made according to SAE J 518 C and ISO 6162-1/2, and they are for safe and leak-free flange connections. And now we are one of the first class quality SAE flanges manufacturer in China.

SAE flanges, hydraulic SAE flanges
Hydraulic SAE flanges

Our Product group of SAE Flange including:

All the above products of SAE flanges come in two main series:

  • 3000 psi standard pressure series designed according to standard ISO 6162-1, SAE 3000 flange is also known as code 61 flanges;
  • 6000 psi high pressure series designed according to standard ISO 6162-2, SAE 6000 flanges are also known as code 62 flanges;

SAE hydraulic flange Pressure rating and working pressure:

There are mainly two different pressure ratings for the SAE hydraulic flanges as below.

  • Standard pressure series SAE class 3000 flanges: pressure rating 3000 psi with working pressure between 35 bar to 350 bar.
  • High pressure series SAE class 6000 flanges: pressure rating 6000 psi with working pressure maximum 400 bar.

SAE Flange Size Range:

As the professional hydraulic SAE flange manufacturers, Younglee can manufacture and supply full size range of SAE 3000 flanges and SAE 6000 flanges.

  • For class 3000 psi standard pressure series: nominal sizes DN 13 (1/2″) – DN 127 (5″)
  • For class 6000 psi standard pressure series: nominal sizes DN 13 (1/2″) – DN 76(3″)

Materials of SAE code 61/ code 62 flanges:

  • Carbon steel SAE flanges
  • Stainless steel SAE flanges: 304, 316,  316L, 316Ti, or equivalent EN/DIN stainless steel grade 1.4301, 1.4401, 1.4404, 1.4571; other grades of stainless steel SAE flanges are available on customers’ request. 

Main applications:

Younglee SAE Flanges are used as one of the most safe and leak free pipe and tube connectors, widely applied in various hydraulic systems in the following fields of industry:

  • Industrial Hydraulics
    • Injection Moulding Machinery
    • Aluminium Die-Casting Machinery
    • Sintering Machinery
    • Steel Mills
    • Hydraulic Presses
    • Paper Processing
  • Mobile Hydraulics

    • Building Machinery
    • Agricultural Machinery
    • Forestry Machinery
    • Lifting and Material Handling Equipment

As the first class China flange suppliers, we had supplied our products of SAE Flanges to many customers in China market and oversea markets, we had gained very good reputation in these markets.

Main advantages:

Younglee SAE Flanges / hydraulic SAE Flanges have below advantages:

  • High pressure resistance,  6000 psi SAE Flanges / code 62 flanges can be used under working pressure upto 400 bar(6000psi).
  • Precision dimensions
  • Low cost

Customers who are interested in China SAE Flanges please feel free to contact us for more details.

SAE socket weld flanges

SAE Socket Weld Flanges and Counterflanges

SAE Socket Weld Flanges are one of the main types of SAE wled flanges, which are designed and manufactured according to standard ISO 6162-1/ ISO 6162-2. Products are conform to standard SAE J518 as well.

SAE Socket weld flanges

Main styles:


  • ISO 6162-1: for 3000 psi standard pressure series (light duty), known as code 61 flanges as well
  • ISO 6162-2: for 6000 psi high pressure series (heavy duty), known as code 62 flanges as well

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SAE Socket Weld Elbow Flanges

SAE Socket Weld Elbow Flanges are one of the popular type of SAE socket wled flanges. The elbow is usually 90°. So they are know as SAE 90° Flanges as well.

Younglee SAE-socket-weld-elbow-flange

  • Carbon steel SAE 90° Flanges: C45, C20, CQ235, or on requests.
  • Stainless steel SAE 90° Flanges: 304, 316, 316L, 316Ti or equivalent EN/DIN stainless steel grades 1.4301, 1.4401, 1.4404, 1.4571, used for connecting stainless steel hydraulic tubing.

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SAE Screw-in Flanges | SAE threaded flanges

SAE screw-in flanges (SAE threaded flanges) are the main products of Younglee’s SAE flange products group. This product is designed according to ISO 6162-1/-2, and conform to SAE J518C, and comes in two main varieties according to the different thread types:


Size Range:

  • 3000 psi standard pressure series: 1/2″ (DN13) to 5″(DN127)
  • 6000 psi high pressure series: 1/2″ (DN13) to 2″(50.8mm)

Materials available:

  • Carbon steel
  • Stainless steel: AISI 304, 316, 316L, 316Ti or corresponding EN/DIN steel grades 1.4301, 1.4401, 1.4404, 1.4571, other steel grades on request.

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