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Painted Welded Pipe

Painted Welded Pipe
"Painted welded pipe" is not a separate category of steel pipes; it refers to products whose surface has been painted after being welded pipes (such as straight seam welded pipes and spiral welded pipes). The core purpose of this treatment is corrosion prevention and aesthetic identification.
Therefore, its "characteristics" need to be understood from two levels: first, the characteristics of the "welded pipe" itself as the base material; and second, the additional properties brought about by the "painting" surface treatment.

No. 121, Daqiao Road, Licheng District, Jinan City

Product Description
Spot warehousing
Product Inspection
Product Measurement
Customer Feedback
Parameter categoriesSpecific projectsDetailed description/numerical range
Substrate SpecificationsOuter diameter (OD)Φ21mm - Φ3620mm (covering ERW straight seam pipe and SSAW spiral pipe)
Wall thickness (WT)1.0mm - 30mm (customizable according to pressure rating and nozzle diameter)
lengthTypically 6m - 12m, custom length production supported.
Substrate materialCarbon structural steelQ195, Q235A/B (commonly used for low-pressure fluid transportation)
Low alloy high strength steelQ345B (Q355B) is used for structural supports requiring higher strength.
Pipeline steelL245 (B), L360 (X52), X42 - X70 (for long-distance oil and gas pipelines)
Coating parametersCoating materialsEpoxy resin (EP), polyethylene (PE), epoxy coal tar pitch, acrylic resin, polyurethane, etc.
Coating thickness100μm - 1000μm

 Ordinary anti-corrosion paint: 100-300μm

 Epoxy powder/PE coating: 400-1000μm

Surface treatmentShot blasting/sandblasting removes rust to Sa2.5 grade, ensuring coating adhesion.
Implementation StandardsSteel pipe standardsGB/T 3091 (Low-pressure fluid transportation)

GB/T 9711 / API 5L (Oil and gas industry)

SY/T 5037 (General fluid transportation)

Coating StandardsCJ/T 120 (Plastic-coated composite steel pipe for water supply)

DL/T 802 (Conduit for power cables)

Performance indicatorsCorrosion resistance levelSalt spray testing can last 1000-2000 hours without rust (depending on the coating system).

Applicable temperature-30℃ to 120℃ (temperature resistance varies depending on the coating material)

AdhesionThe cross-cut test meets Level 1 standards, and the coating is not easily peeled off.
Typical applicationsSceneUrban water supply and drainage, fire protection pipelines, oil and gas transmission, building structural support, cable protection conduits


仓库现货3


01

Acid and alkali resistance test

02

Zinc layer experiment

03

Bending test

04

Yield strength test

05

Tensile strength test

06

Spectral detection

07

Hardness testing

08

Chemical composition detection

壁厚测量

Thickness measurement

厚度测量

Thickness measurement

厚度测量666

Thickness measurement

半径测量

Radius measurement

直径测量

Diameter measurement

直径测量2

Diameter measurement

长度测量

Length measurement

涂层测量

Coating measurement

TESTIMONIALS

The quality of this batch of steel pipes far exceeded expectations. The material is uniform and thick, the cut is smooth and burr-free, and the installation is seamless. The project efficiency was maximized, and the cooperation was very pleasant!

Julian

Julian

Sales Director

We've collaborated several times, and the hardness and toughness of the steel perfectly meet our project standards. The delivery speed is fast, and the packaging is secure with no damage. A reliable supplier is our first choice!

John Smith

John Smith

Sales Director

The surface treatment of the steel pipe is very good, the anti-rust coating is uniform and firm, and the dimensional accuracy is very high. It does not require secondary processing at all, which greatly saves our time and costs.

Freya

Freya

Purchasing Manager

The steel is very cost-effective, has stable mechanical properties, and passed the test on the first try. Customer service responded promptly, and communication was very smooth. We will continue to cooperate with them in the long term.

Elara

Elara

Purchasing Manager

The custom-made irregular-shaped steel pipes perfectly replicated our design drawings. The workmanship was exquisite and flawless, and the delivery time perfectly met the project schedule. We are extremely satisfied with this purchase!

Lila

Lila

Purchasing Manager

 Online Consultation

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