Heavy-Wall Factory Wholesale Cold Rolled Precision Steel Pipe with Competitive Price

• Customization: Available
• Type: Seamless/Welded
• Technique: Cold Drawing/Cold Rolling/ Welded
• Material: Carbon Steel/ Stainless Steel/Alloy Steel/Other
• Surface Treatment: Black/Oiled/Galvanized/Other
• Usage: Hydraulic/Automobile Pipe, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Construction & Decoration, Special Purpose
• Section Shape: Round/ Square/ Rectangular/ Oval/ Other Special Se
• Od: 5mm ~ 114mm
• Wall Thickness: 0.3mm ~ 20mm
• Tolerance: +/-0.1mm
• Steel Material: 10#, 20#, 45#, Q235B, ASTM 1020, E235, etc.
• Delivery State: Bk, Bkw, Nbk, Gbk, Bks
• Transport Package: Bundles or Boxes
• Origin: China

Product Description

Product Description

Tolerance	+/-0.1mm
Technique	Cold drawing/Cold rolling/ Welded
Standard	ASTM A519, DIN2391, SAE J524, EN10305-4, GB/T3639
Steel material	10#, 20#, 45#, Q235B, etc.
Delivery state	BK, BKW, NBK, GBK, BKS

Product Application

Sanli Precision Steel Tube Processing Factory was established in October 2003 and is located in Huadu District, Guangzhou, Guangdong Province. With over 20 years of development, our factory has grown into a key local enterprise with more than 10,000 m² of production area and has achieved over 10% annual growth for five consecutive years.

Our "Guanggang DNA" – The Foundation of Our Technical Strength

Sanli's technical strength is rooted in our "Guanggang DNA"—a team with experience at Guangzhou Iron & Steel Enterprise Group (Guanggang), which was widely regarded as one of the leading steel groups in South China. This strong industrial heritage ensures that every step—from raw materials to processing and quality control—meets large-enterprise standards with meticulous attention to detail.

End-to-End Process Control

What sets us apart is full-chain manufacturing under one roof. From pickling and annealing to cold drawing/cold rolling and welding, we manage chemistry, dimensions, and surface finish as one integrated system—reducing variation across batches and ensuring reliable precision.

Trusted by Leading Supply Chains

Today, our thin-wall precision tubes support demanding applications across home appliances and automotive components, including long-term programs connected to GREE, Midea, Panasonic, Mitsubishi, Hitachi, Galanz, and the GAC Group ecosystem.

Our Factory

FAQ

Q1: What are your main products?

 A1: We specialize in small-diameter, thin-wall precision tubes, fully customized to your specifications.

· Seamless tubes (cold-drawn/rolled): OD 5–114mm, WT 0.3–20mm

· Welded tubes: OD 18–42mm, WT 1–6mm

Materials include carbon steel, alloy steel, stainless steel (201/304/316L), aluminum, and SPCC/SPHC/Q235B for welded tubes.

 

Q2: How do you ensure product quality?

 

A2: Our quality system is built on the strict industrial culture of Guangzhou Iron & Steel Group (GZ Steel).

We provide:

· Full in-house testing: chemical analysis, dimensional checks, eddy-current, hardness & tensile tests

· EN10204 3.1 MTC with every shipment

· Integrated process control ensuring H8/H10 accuracy and Ra 0.8–1.6μm surface quality

 

Q3: What packaging do you offer?

 

A3: Export-standard packaging: bundled with waterproof covers or wooden cases.

Custom labels, markings, and packaging options are available upon request.

 

Q4: What is your typical delivery time?

 

A4: Standard orders ship within 15–25 working days.

Urgent orders can be accelerated depending on requirements.

 

Q5: Are you a manufacturer?

 

A5: Yes. We are a direct manufacturer (since 2003) with a 10,000+ sqm facility in Guangzhou.

Our technical team comes from GZ Steel with 30+ years of tube-making expertise, ensuring top quality and competitive pricing.

 

Q6: What is your MOQ?

 

A6: MOQ is flexible and negotiable.

We support small-batch orders, prototyping, and rapid size changes for customized production.

 

Q7: What are your payment terms?

 

A7:

· T/T: 30% deposit + 70% balance before shipment

· L/C: negotiable

Trade terms available: FOB, CIF, CFR, EXW, DDP etc.

 

Q8: Why choose Sanli Precision?

 

A8:

· Niche expertise: Small-diameter (5–114mm) & thin-wall (0.3–20mm) tubes

· GZ Steel heritage: 30+ years of metallurgical and process know-how

· Reliable quality: Strict QC, full traceability

· Flexible service: Small MOQ, quick turnaround, customized materials & specs

· Trusted by global brands: Gree, Midea, Panasonic, Mitsubishi, GAC Group