Manufacturing methods of precision honing tubes: heating, piercing, annealing, borax spraying, hot rolling, stripping, stress relief annealing, pickling treatment, phosphating, saponification treatment, primary cold drawing, secondary cold drawing, heat treatment, honing , Heat straightening treatment, precision honing tube is generally intermittent production.
Hydraulic steel pipes are basically divided into fluid pipes and oil steel bobbins used in hydraulic systems, also known as honing pipes, while cold-drawn or cold-rolled precision seamless steel pipes also include hydraulic steel pipes.
The fluid pipe on the hydraulic system is close to the domestic national standard GB3639-83. Introduction of hydraulic steel pipe: cold-drawn or cold-rolled precision seamless steel pipe with high dimensional accuracy and good surface finish for hydraulic equipment . The precision seamless steel pipe is used to manufacture mechanical structures or hydraulic equipment, etc. The precision steel pipe is a high-precision seamless steel pipe after cold drawing or cold rolling. Because there are no oxide layers on the inner and outer walls of the precision steel pipe, no leakage under high pressure, high precision, high finish, no deformation in cold bending, no flaring, no cracks in flattening, etc., it is mainly used to produce pneumatic or hydraulic products.
In the standard it is DIN2391-1. The raw material of the hydraulic steel pipe has undergone precise drawing, non-oxidative bright heat treatment (NBK state), non-destructive testing, the inner hole of the steel pipe is subjected to high pressure washing and pickling, the inner and outer walls of the steel pipe are treated with anti-rust oil, and the two ends are sealed for dust-proof treatment. . The steel pipe produced has high precision, good finish, no oxide layer on the inner and outer walls of the steel pipe, the steel pipe can withstand the high pressure of liquid flow through, and the steel pipe is not deformed by cold bending, and can be flared and flattened without cracks. Mechanical properties can be bent at any angle without deformation. It is mainly used to prepare steel pipes in the oil circuit of hydraulic systems, also known as hard piping in hydraulic systems, and precision steel pipes for automobiles. The length is 6 meters to fixed length (except for custom-made), and the delivery state is NBK (normalizing), GBK (annealing), BKS ( stress relief annealing ). The main materials are ST35, ST37.4 (10#), ST45 (20#), ST55 (35#), ST52 (16Mn), etc., which can meet the requirements of high precision, high finish, tensile strength and high mechanical properties for steel pipes. client.
European standard EN10305-4:2003 quasi-hydraulic steel pipe introduction: The precision hydraulic steel pipe produced is a precision cold drawn seamless pipe, which is made of anaerobic tempering treatment to eliminate surface and internal stress, and then phosphating and rust-proofing treatment. The product has high dimensional accuracy, good ductility, and is easy to be processed and bent into various required shapes without shrinking or flattening the section of the pipe; the surface of the pipe has high precision and moderate surface hardness after anaerobic tempering. And the surface can be installed directly without pickling and rust removal after phosphating and anti-rust treatment.
Honing pipe : The cold-rolled precision seamless steel pipe is a hydraulic steel pipe made of a finished seamless steel pipe or a blank seamless pipe after pickling, phosphating, and saponification, and then rolled by a cold rolling mill. The precision of the hydraulic steel pipe is extremely high and can generally be controlled within the range of 0.02-0.05MM, the standard is: GB3639-83, the allowable deviation of the inner diameter is 0.03mm, the inner surface roughness: Ra 0.2 ~ 0.8μm, the hydraulic steel pipe is straight Degree: 0.3～1.5mm/m, the cylinder diameter is specially made of oil steel.
The weight of seamless steel pipe kg/m = (Od - Wt) * Wt * 0.02466 where Od is the outer diameter Wt is the wall thickness (: (outer diameter - wall thickness) * wall thickness * 0.02466 Kg/m.
cold finished Rm Mpa
cold finished Elonggation
Q:What is your terms of payment?
A:We usually accept T/T in advance, L/C for large sum.If you prefer other payments terms, please discuss.
Q:What is the terms of delivery?
A:EXW, FOB, CIF
Q:What is the terms of packing?
A:Generally, we pack our goods in bundles or coils with rods or belts, we could also pack the goods as the customers' requirements.
Q:What is your delivery time?
A:For products in stock, we can ship it within 7 days after receiving the deposit.For custom order, production time is 15-30
workdays after received the deposit.
Q:Could you produce according to the samples?
A:Yes, we could customer-made by your samples or technique drawings, we could build the mold and fixtures.
Q:Can I place an sample order and what is your MOQ if I accept your quality?
A:Yes, we can send you samples but you may pay the express fees, our MOQ is 1 ton.
Q:How could you guarantee your products?
A:We accept and support the third-party inspection.We also could issue the warranty to customer to guarantee the quality.
Q:Where is the port of shipment?
A:Ningbo or Shanghai sea port.
Q:How can I get the price of needed product?
A:It's the best way if you can send us the material, size and surface, so we can produce for u to check the quality.If you
still have any confusion, just contact us, we would like to be helpful.