How do you guarantee product quality?

We provide a pre-production sample before mass production and conduct a final inspection before shipment. All products undergo double inspection by quality controllers.

What payment and delivery terms are accepted?

Accepted terms include FOB, CFR, CIF, EXW, DDP, DDU. Payments via T/T, L/C, MoneyGram in USD, EUR, HKD, or CNY.

What is the lead time for production?

The average lead time is one month for both peak season and off-season periods.

En 10305-4 E355 E235 Precision Hydraulic Line Galvanized Steel Pipe

Name: En 10305-4 E355 E235 Precision Hydraulic Line Galvanized Steel Pipe
Brand: Zhangjiagang Chewit International Co., Ltd.
SKU: 2213885755

Jiangsu, ChinaZhangjiagang Chewit International Co., Ltd.

US$1.50-7.00

1,000 kg

Product profile

Customization

Available

Type

Seamless

Technique

Cold Drawn

Model NO.

E215 235 255 355

Material

Carbon Steel

Surface Treatment

Black Phosphated, Ba,Galvanized

Usage

Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Mining, Special Purpose

Section Shape

Round

Standard

En10305-4

Delivery Condition

Bk, Gbk, Bkw, Bks or Nbk

Steel Grade

E235 355

Certificate

ISO 9001 Ts16949

Secondary or Not

Non-Secondary

Application

Automotive, Hydraulic System and Precision Device

Transport Package

Bundles or Boxes

Specification

OD2-60mm

Trademark

Origin

China

HS Code

7304319000

Production Capacity

1000ton/Month

Key features

High Precision & Low Roughness: Cold drawn seamless tubes with precise size, low inner/outer surface roughness, and good mechanical performance.

Wide Standard Compliance: Meets EN 10305-4, DIN 2391, ASTM A822, GB/T 8163, JIS G3445, and ISO 8535 standards.

Versatile Material Options: Available in Carbon Steel, Alloy Steel, and Stainless Steel (304, 316, etc.) with various steel grades.

Comprehensive Quality Inspection: 100% Eddy Current Test, tensile/yield strength checks, flattening, flaring, and chemical analysis.

Broad Industrial Applications: Ideal for automotive, hydraulic systems, aerospace, mining, heat exchangers, and precision engineering.

Multiple Surface Treatments: Options include Black Phosphated, Galvanized, and various delivery conditions like BK, GBK, NBK.

Strict Quality Guarantee: Pre-production samples and final inspections before shipment ensure consistent high quality.

Flexible Customization: Customizable standard, delivery condition, steel grade, and certificate according to EN 10204 3.1.

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: ≤6.53h 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 advantages of this steel pipe?

Advantages include high precision in size, excellent mechanical performance, and lower roughness for both inner and outer surfaces.

Q:What standards and steel grades are available?

We comply with EN 10305-4, DIN 2391, ASTM A822, GB/T 8163, JIS G3445, etc. Grades include E235, E355, ST35, ST45, ST52, and stainless steels like 304/316.

Q:What is the size range for these tubes?

The Outer Diameter (OD) ranges from 2mm to 60mm, and Wall Thickness (WT) from 0.3mm to 10mm. Inner Diameter (ID) can be 1-12.5mm for specific standards.

Q:What inspection items are performed on the products?

Inspections include 100% Eddy Current Test, tensile strength, yield strength, elongation, flattening, flaring, chemical analysis, and 100% size and surface checking.

Q:What are the common applications for these pipes?

They are used in automotive (fuel lines, power steering), hydraulic systems, aerospace, mining machinery, heat exchangers, and precision engineering.