Can you customize the product size and shape?

Yes, we support OEM/ODM. We can produce round, square, rectangular, or profiled tubes with custom outer diameters (16-2000mm), thicknesses, and lengths based on your drawings.

What are the main applications of your stainless steel tubes?

Our tubes are widely used in mechanical industries (boilers, heat exchangers), sanitary industries (food, beverage, pharmacy), and large diameter fluid conveying (oil, chemical).

DN30 DN40 DN50 Outer Diameter Stainless Steel Tubing Sizes

Name: DN30 DN40 DN50 Outer Diameter Stainless Steel Tubing Sizes
Brand: Guangdong Yaolong Metal Technology Co., Ltd.
SKU: 788224052

Guangdong, ChinaGuangdong Yaolong Metal Technology Co., Ltd.

US$4.25

600-1,799 Meters

US$3.85

1,800-2,999 Meters

US$3.45

3,000+ Meters

Sample price:US$0.00/piece.Request sample

Product profile

Customization

Available

Type

Stainless Steel Pipes

Standard

ASTM, AISI, GB, JIS, DIN, EN

Model NO.

YLGD-WT-198

Grade

300 Series

Certification

ISO, SGS/En 10204 3.1

Shape

Round

Technique

Welded

Surface Treatment

No.1,No.4,2b,Ba,Hl,8K,Polish,Pickling

Outer Diameter

16mm - 2000mm

Thickness

0.8mm - 20mm

Length

6~18.3 Meter

MOQ

2 Tons

Visit Our Factory

Welcome

Transport Package

Poly Bag, Woven Bag, Wooden Box Packing

Trademark

Yaolong

Origin

Foshan or Nantong

HS Code

7326909000

Production Capacity

150 Tons Per Month

Key features

Wide Size Range: Outer diameter 16-2000mm, thickness 0.8-20mm, length 6-18.3m or customized.

High Strength & Safety: 3x stronger than steel, 8-10x stronger than plastic; earthquake resistant and leak-proof.

Hygienic Surface: Smooth inner wall prevents scaling and bacterial growth, ensuring drinking water safety.

Superior Insulation: Low thermal conductivity with insulation performance 5x that of copper pipes.

Professional Manufacturing: 5 factories, 13+ years experience, annual capacity over 15,000 tons.

Custom OEM/ODM: Supports custom shapes, sizes, and surface treatments based on engineering drawings.

Global Certifications: Certified by ISO9001, TUV, SGS, PED 2014/68/EU, and AD 2000-Merkblatt W0.

Versatile Applications: Suitable for petrochemical, food, pharmaceutical, and high-temperature fluid industries.

Company profile

Guangdong Yaolong Metal Technology Co., Ltd.

Guangdong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service AvailableExport Year: 2005-01-01 CertifiedNearest Port: Foshan Port, Guangzhou port, Nantong Port, Shenzhen PortAverage Response Time: ≤1.60h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryGuangdong Yaolong Metal Technology Co., Ltd. is a China-based limited company established in 2004, with 131 employees and operations in Foshan, Guangdong. It specializes in stainless steel and aluminum flagpoles, light poles, bollards, tubes, pipes, and related products. The supplier reports ISO 9001, ISO 14001, and ISO 45001 certifications, more than 10 production lines, 50 quality-control staff, seven R&D engineers, and documented production capacity across poles, tubes, pipes, and bollards. It has exported since 2005, with exports representing 41%–50% of sales, and lists overseas markets including the United States, Canada, Australia, the United Kingdom, Spain, and Gulf countries. Evidence supports production, certification, international sales, and some innovation capability, while after-sales service, financial credibility, customization capability, and specific customer cases remain insufficiently documented.

Supplier typeThe supplier is identified as Guangdong Yaolong Metal Technology Co., Ltd., a Chinese limited company established in 2004, with its head office and operating location in Foshan, Guangdong. It is described as an enterprise integrating R&D, design, production, and distribution, while another record classifies the company nature as a trading company; therefore, it has both trading and manufacturing-related characteristics.

CertificationsThe supplier reports ISO 9001:2015 quality-management certification, ISO 14001:2015 environmental-management certification, and ISO 45001:2016 occupational-health-and-safety certification. A separate description also references ISO 9001, ISO 1400, and GB/T 28001 systems, providing consistent evidence of formal management-system certification.

R&D capabilityThe company states that it integrates R&D and design, employs seven R&D engineers, and has applied for patents including an electronic monitoring and control device for a flag-raising system. Its listed CNC, laser, plasma, water-jet, bending, polishing, and other equipment further supports technical development and engineering capability.

Production capacityThe supplier reports more than 10 production lines, 50 quality-control staff, monthly output of 5,000 units and annual output of 60,000 units for stated products, plus annual capacities of 240,000 meters each for flag poles and light poles, 10,000 tons for tubes and pipes, and 100,000 meters for bollards. Its extensive machinery list and dedicated factory location in Shunde provide additional evidence of established manufacturing capability.

Product Q&A

Q:Are you a trading company or manufacturer?

We are a professional manufacturer with 5 factories, specializing in producing welded stainless steel pipe/tube and stainless steel bollards for over 13 years.

Q:What is the delivery time?

Delivery time depends on quantity. Generally, it takes 30 days. Peak season lead time is one month, while off-season lead time is within 15 workdays.

Q:Do you provide free samples?

If you do not need to print your logo or artwork, samples are free. You only need to provide your freight collect account (e.g., FedEx, DHL). Otherwise, express fees apply.

Q:How can I get the best price?

Please leave your contact information for the best quotations. We will get back to you with the best solutions and prices as soon as possible.

Q:What certifications do you have?

We are certified by ISO9001:2015, ISO14001:2015, ISO45001:2016, TUV, SGS, PED 2014/68/EU, and AD 2000-Merkblatt W0.