Steel Hydraulic Pipe En10305-4 Bright Annealed Galvanizing Cold Drawn Precision Steel Pipe

Name: Steel Hydraulic Pipe En10305-4 Bright Annealed Galvanizing Cold Drawn Precision Steel Pipe
Brand: Zhangjiagang Chewit International Co., Ltd.
SKU: 2132384205

Jiangsu, ChinaZhangjiagang Chewit International Co., Ltd.

US$1.50-7.00

1,000 kg

Sample price:US$50.00/piece.Request sample

Product profile

Customization

Available

Type

Seamless

Technique

Cold Drawn

Model NO.

12*2mm, 16*2mm, as per request.

Material

Carbon Steel

Surface Treatment

Bright Annealing, Black Phosphating, Galvanizing

Usage

Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Machinery Industry, Chemical Industry, Mining, Heat Exchanger

Section Shape

Round

Standard

DIN2391/1629/1630/2445/73000

Delivery Condition

Bk, Gbk, Bkw, Bks or Nbk

Steel Grade

St35/37/44/45/52/37.4/44.4/52.4

Certificate

ISO 9001 Ts16949

Secondary or Not

Non-Secondary

Application

Automotive, Hydraulic System and Precision Device

Transport Package

Plywood Box or Bundles

Specification

OD2-60mm

Trademark

Origin

China

HS Code

7304319000

Key features

Compliant with DIN2391 & EN10305-4 standards, ST37.4/E235 grade delivers precise dimensional tolerance and excellent pressure resistance, ideal for high-pressure hydraulic systems.

Available in bright annealed, galvanized and black phosphated finishes to meet diverse anti-rust, lubrication and assembly requirements for different working conditions.

Superior ductility and machinability, performs well in bending, flaring and flattening processes without cracking, ensuring easy installation and long service life.

Company profile

Zhangjiagang Chewit International Co., Ltd.

Jiangsu, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: OEM Service AvailableExport Year: 2013-08-01 CertifiedNearest Port: shanghaiAverage Response Time: ≤6.94h CertifiedTerms of Payment: LC, T/T

AI-Powered supplier vetting

SummaryZhangjiagang Chewit is a China-based limited trading company established in 2010, with stated precision-tube and steel-forging manufacturing activities. The supplier reports ISO9001:2015 certification, more than 10 production lines, approximately 5,000 tons of annual seamless-steel-pipe productivity, broad export-market coverage, and one-month lead times in both peak and off-peak seasons. Its quality claims include 100% dimensional and surface checks, batch chemical and mechanical testing, and non-destructive testing upon request. Evidence is insufficient to assess after-sales service, financial credibility, and customization capability. Innovation evidence is limited to an associated forging operation reporting 11 authorized patents, while customer evidence consists of one listed buyer and one trade transaction.

Supplier typeThe supplier is identified as a China-based limited company and trade company, with stated manufacturing activities in precision steel tubes and forgings. Its product scope includes seamless, welded, carbon, stainless, hydraulic, cold-drawn, and precision tubes, indicating a specialized steel-product supplier with both trading and manufacturing positioning.

CertificationsThe supplier explicitly reports an ISO9001:2015 management-system certificate. It also describes inspection and industry-related qualifications associated with its forging operation, including API 20B, PED, and classification-society credentials, although the scope and holder of each qualification are not separately specified.

R&D capabilityThe supplier describes advanced production and inspection equipment, precision-tube manufacturing, and a forging operation with 11 authorized patents, including three invention patents. These statements provide explicit but limited evidence of process and product-development capability, mainly linked to the forging operation rather than clearly to the entire supplier entity.

Production capacityThe supplier reports more than 10 production lines, annual seamless-steel-pipe productivity of 5,000 tons, heat-treatment furnaces, inspection equipment, and manufacturing of precision tubes and forgings. The descriptions also cite a 10,000-square-meter tube operation and a substantially larger forging facility, although employee and facility figures are inconsistent across slices and should be verified.

Client casesThe supplier states that it serves wind power, oil and gas, transportation, shipbuilding, and gearbox sectors and has entered the global purchasing system of a major company since 2006. The trade data identifies one buyer and one transaction, so sector references are available but the breadth and depth of verifiable customer cases remain limited.

Product Q&A

Q:What are the main differences between your hydraulic steel pipes and ordinary seamless pipes?

Our pipes are specifically designed for hydraulic systems, featuring high precision (tolerance up to 0.05mm) and a highly clean inner surface. We use a specialized bright annealing process to ensure no scale or oxidation inside, which prevents damage to sensitive hydraulic valves and pumps.

Q:Which international standards and steel grades do you follow?

We strictly produce according to DIN 2391, EN 10305-1, and EN 10305-4. Common grades include E235 (St 37.4), E355 (St 52.4), and specialized carbon steel for high-pressure environments. Each batch comes with a EN10204-3.1 Mill Test Certificate (MTC).

Q:How do you ensure the internal cleanliness and corrosion resistance of the tubes?

For corrosion resistance, we offer options like zinc-plating (Cr6-free), phosphating, or oil-dipped surfaces to ensure the pipes remain rust-free during long-distance sea freight and storage.