How is quality guaranteed?

Pre-production samples and final inspections before shipment are always conducted.

What is the lead time for delivery?

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

Is OEM service available?

Yes, OEM service is available for customized requirements.

30*4mm Smooth Surface High Precision Welded Carbon Steel Tube

Name: 30*4mm Smooth Surface High Precision Welded Carbon Steel Tube
Brand: Zhangjiagang Chewit International Co., Ltd.
SKU: 2141268265

Jiangsu, ChinaZhangjiagang Chewit International Co., Ltd.

US$1,000.00-1,800.00

1 Ton

Product profile

Customization

Available

Type

Welded

Technique

Cold Drawn

Model NO.

1010 1015 1025 1030

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

Section Shape

Round

Standard

BS 6323(-6)

Delivery Condition

Bk (+C) Bkw (+LC) Bks (+Sr) Gbk (+a) Nbk (+N)

Steel Grade

Cws2/Cws4/Cws5/etc

Secondary or Not

Non-Secondary

Certificate

ISO 9001 Ts16949

Application

Automotive, Hydraulic System and Precision Device

Product Name

Carbon Welded Steel Pipes

MOQ

1ton

Transport Package

Box or Bundles

Specification

OD3-100mm

Trademark

Origin

China

HS Code

7304319000

Key features

High Precision & Smooth Surface: Free from scale, rust, and imperfections with invisible welding seams.

Customizable Material & Size: Carbon, stainless, or alloy steel; OD 3-100mm or as per request.

Multiple Delivery Conditions: Available in BK, BKW, BKS, GBK, NBK states for specific needs.

Wide Application Scope: Suitable for automotive, hydraulic systems, machinery, and oil/gas.

Strict Quality Inspection: 100% eddy current, size, and surface checks; EN 10204 3.1 certs.

Low Inner Roughness: Ensures good mechanical performance and smooth fluid flow.

Global Market Presence: Serving Eastern Asia, Mid East, Europe, and Americas since 2010.

Flexible Payment Terms: Accepts USD, EUR, HKD, CNY via T/T or L/C.

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: ≤5.37h 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.