What is the lead time for production?

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

Do you offer OEM services?

Yes, OEM service is available for our products.

What standards do your pipes comply with?

Our pipes comply with GB/T3639, DIN2391, EN10305-1, and other equivalent standards.

Jacks Seamless Carbon Steel Pipes Tube

Name: Jacks Seamless Carbon Steel Pipes Tube
Brand: Zhangjiagang Chewit International Co., Ltd.
SKU: 2021757775

Jiangsu, ChinaZhangjiagang Chewit International Co., Ltd.

US$0.80-2.50

1,000 kg

Product profile

Customization

Available

Type

Seamless

Technique

Cold Drawn

Model NO.

E215 E235 E255 E355

Material

Carbon Steel

Surface Treatment

Galvanized, Black Phosphated, Ba

Usage

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

Section Shape

Round

Standard

DIN 2391

Delivery Condition

Bk, Bkw, Nbk

Steel Grade

St35, St37.4, St45, St52, St52.4

Secondary or Not

Non-Secondary

Certificate

ISO 9001 Ts16949

Application

Automotive,Hydraulic System and Precision Device

Transport Package

Box or Bundles

Specification

OD2-60mm

Trademark

Origin

China

HS Code

7304319000

Key features

Precision Tolerance Control: OD and ID tolerance can be +/-0.03mm min or as per request with 100% size checking.

Multiple Steel Grades: Available in ST35, ST37.4, ST45, ST52, 10#, 20#, 45#, 4130, 4140 and others upon request.

Advanced Surface Treatment: Galvanized, Black Phosphated, or Ba treated for lower roughness and best surface condition.

Strict Quality Inspection: Double inspection by professional controllers with vivid test reports before delivery.

Versatile Application Scope: Suitable for hydraulic systems, automotive, machinery, oil/gas drilling, and chemical industries.

Customized Delivery Conditions: Options include BK, BKW, and NBK to meet specific mechanical property requirements.

Comprehensive Certifications: ISO 9001 and TS16949 certified for automotive, hydraulic system, and precision device applications.

Flexible Standard Compliance: Meets GB/T3639, DIN2391, EN10305-1 and other equivalent international standards.

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: ≤5.43h 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.