What are the advantages of welded pipe over polished pipe?

Welded pipes with acid pickling have more uniform wall thickness and stronger pressure bearing. Polishing can thin the weld zone and alter chemical composition, increasing magnetism in austenitic stainless steel.

Alloy-Base Seamless Stainless Steel N08028 N08904 N08800 Tube

Name: Alloy-Base Seamless Stainless Steel N08028 N08904 N08800 Tube
Brand: Wenzhou Sinco Steel Co., Ltd.
SKU: 860086745

Zhejiang, ChinaWenzhou Sinco Steel Co., Ltd.

US$2.45-3.65

50 kg

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Type

Seamless,Welded

Technique

Cold Rolled,Cold Drawn,Hot Rolled,ERW,Efw

Model NO.

304/316L

Material

Alloy Steel

Surface Treatment

Varnishing/Antispetical/Polished/Oiled

Usage

Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose

Section Shape

Round

Wall Thickness

1mm-5mm

Length

Customize

Certs

ISO 9001-2008, CE. PED

Color

Sliver

Lead Time

15-50days

Transport Package

Nylon Bags or Wooden Box

Specification

1/2"-8"(DN15-DN200)/21.3mm-273mm

Trademark

SINCO

Origin

Wenzhou, China

HS Code

7304419000

Production Capacity

2000ton/Month

Key features

Wide Material Range: Available in 316L, TP304, TP316, TP347, S32750 and other grades.

Flexible Dimensions: OD 4mm-812.8mm, Thickness 0.5mm-60mm, Length 5.8-6.1m or custom.

Multiple Techniques: Seamless and Welded options via Cold Rolled, Hot Rolled, ERW, etc.

Global Certifications: ISO 9001-2008, CE, PED, ASME, ABS, CCS, LR, DNV, BV certified.

OEM Service: Supports customization from samples, designs, and flexible adjustments.

Low MOQ: Minimum Order Quantity starts at just 5 pieces.

Fast Delivery: Lead time typically 15-50 days depending on quantity and location.

One-Stop Service: Supply fittings, flanges, valves alongside seamless and welded pipes.

Company profile

In-stock CapacityManagement CertificationYears of Export ExperienceFast Delivery

Wenzhou Sinco Steel Co., Ltd.

Zhejiang, China

CertifiedBusiness Type: Trading Company CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 13 Years CertifiedNearest Port: Ningbo Port, Shanghai PortAverage Response Time: ≤6.14h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryThe supplier is identified as a professional technical supplier serving nuclear, food processing, coal gasification, environmental protection, and aerospace industries. It offers broad customization, including sample-, design-, full-, minor-, and flexible customization, supported by CAD and documented design inputs, outputs, reviews, verification, and validation. However, it does not provide 3D software design, ODM, SDK, private mold, or well-known-brand OEM services, and reported no new products in the past year. Export experience is established, with 13 years of exporting and 71%–90% of sales from exports, but no overseas showroom, agent, branch, or offline trade-show participation. ERP, OA, CRM, SAP, digitalization, and big-data initiatives are reported. Complaint handling and corrective/preventive action lack written procedures or records, while certification, financial credibility, production capacity, and customer cases are insufficiently evidenced.

Supplier typeThe supplier explicitly identifies as a professional technical supplier and describes service orientation toward nuclear, food processing, coal gasification, environmental protection, and aerospace industries. This supports classification as an industry-focused technical supplier rather than a general trading entity.

After-Sales capabilityThe supplier has no overseas showroom, agent, branch, or offline trade-show history, and reports no written procedures or records for complaint handling or corrective and preventive actions. These explicit limitations indicate weakly documented after-sales and service-support capability.

R&D capabilityThe supplier has R&D-related design documentation and CAD capability, but reports no new products in the past year, no ODM, no SDK, no patents, and no private mold designs. The evidence shows basic design capability but also explicit limitations in recent product innovation and proprietary development.

Customization capabilityThe supplier explicitly provides customization from samples, designs, full customization, minor customization, and flexible customization, supported by CAD and documented design review, verification, and validation materials. This is direct evidence of broad customization capability, although the supplier does not offer 3D software design services or private molds.

Product Q&A

Q:How many countries have you exported to?

We have exported stainless steel pipes to more than 30 countries, mainly including Egypt, Turkey, India, Iran, Dubai, Thailand, and the Philippines.

Q:What is your product range?

Based on our stainless steel seamless pipe factory, we supply a one-stop service including fittings, flanges, and valves alongside our pipes.

Q:What is your delivery time?

Delivery time depends on demanded quantities and location, typically 15-50 days. Seamless and welded pipes may require more time than other pipe fittings.

Q:Can you provide OEM service?

Yes, we welcome OEM requests. Please contact us for more details to discuss your specific customization needs.

Q:Can we visit your factory?

Yes, you are warmly welcome. Once we have your schedule, we will arrange a professional sales team to follow up and guide your visit.