20 Years of Experience in Seamless Steel Tube Production

Black Phosphated Hydraulic Tube In High Precision

Black Phosphated Hydraulic Tube In High Precision
Black Phosphated Hydraulic Tube In High Precision
Black Phosphated Hydraulic Tube In High Precision

Synopsis of Process Routing

Cold drawn and bright NBK seamless steel tube is used as the tube to be phosphated. The phosphated is realized with the imported chemical fluid to form a black film.

The antirust oil is absorbed by means of the micro pore on the film to prevent from the rust. The caps are covered at two ends of tube to prevent from the dust.

Main Application

Used in hydraulic system, shipment industry, nested card connector (pipe joints) with matching.

Main Features

High precision

Great property of anti-rust

Color is homogeneously
distributed on the tube surface

High cleanness
of inside wall

The steel tube is able to withstand high pressure. No deformation after cold bending, no crack after flaring and flattening. The complicated geometrical forming and machining can be realized. 

Color of tube:
bright black

Customer Question

Q: What is precision tolerance tolerance of tube?

A: 

Name Scope GB Series DIN series mm
Enterprise internal control 
standards mm
Special high-precision mm
OD 4~30 ±0.10 ±0.08 ±0.05 ±0.03
31~40 ±0.15 ±0.15 ±0.05 ±0.03
41~50 ±0.20 ±0.20 ±0.08 ±0.03
51~60 ±0.25 ±0.25 ±0.08 ±0.03
Wall 0.5~7 ±10%;MIN±0.12 ±10% ±10%;MIN±0.05 ±10%;MIN±0.03
Q: What is the pressure resistance of the tube?

A: The pressure table of tube Download

Q: What is the delivery time of tube?

A: Our products will be delivered within 30 days.

Q: How long can the tube be stored?

A:
    NBK 1 years without rust
    NBK+Phosphated 2 years without rust
    NBK+Galvanized 3 years without rust

Additional Services

Pipe cutting service
End planing
Chamfering
Spray mark
Surface treatment
Sourcing hard-to-find products

Learn More

Product Inquiry

Verify Code
×

Contact Us

captcha