# Tianjin Ruide Steel Pipe Manufacturing Co., Ltd.

## Company Profile

Tianjin Ruide Steel Pipe Manufacturing Co., Ltd., a leading manufacturer established in 2014 in Tianjin—China's largest steel pipe production base[reference:0]. Equipped with advanced facilities, we operate 4 welded pipe production lines, 2 hot-dip galvanizing lines, 2 square and rectangular pipe production lines, a state-of-the-art laboratory, and a precision finishing and packaging workshop[reference:1].

**Key Facts:**
- **Year Established:** 2014[reference:2]
- **Production Lines:** 8[reference:3]
- **Annual Welded Pipe Capacity:** 800,000 tons[reference:4]
- **Countries Served:** 50+[reference:5]
- **Certifications:** API (American Petroleum Institute), BV (Bureau Veritas), TÜV[reference:6]

## Product Catalog

### 1. ERW Steel Pipe
Electric Resistance Welded steel pipes for construction, oil & gas, water infrastructure, and mechanical applications.[reference:7]

- **Specifications:** Diameter 1/2" to 24" (DN15 to DN600); Wall Thickness 0.5mm to 25mm; Length 6m to 12m (customizable)[reference:8]
- **Material Grades:** ASTM A53 Gr. A/B, API 5L Gr. B/X42/X52/X60, ASTM A333 Gr. 1/Gr. 6, ASTM A500 Gr. B/C, ASTM A252[reference:9]
- **Standards:** API 5L, ASTM A53, ASTM A500, EN 10219, EN 10255[reference:10]
- - [ERW Steel Pipe Details](https://www.rd-steel.com/products/erw-steel-pipe.html)

### 2. LSAW Steel Pipe
Longitudinal Submerged Arc Welded steel pipes for high-pressure oil & gas transmission, large-diameter water pipelines, and structural projects.[reference:11]

- **Specifications:** Diameter 406mm to 1,422mm (16" to 56"); Wall Thickness 6mm to 40mm; Length 3m to 50m (customizable)[reference:12]
- **Forming Processes:** UOE, RBE, JCOE[reference:13]
- **Material Grades:** API 5L X42/X52/X60/X65/X70/X80; ASTM A/B/Gr.60/70[reference:14]
- **Standards:** API 5L (PSL1/PSL2), ASTM A671/A672, EN 10217, ISO 3183[reference:15]
- - [LSAW Steel Pipe Details](https://www.rd-steel.com/products/lsaw-steel-pipe.html)

### 3. Galvanized Square Tubes
Hot-dip galvanized square tubes for construction fencing, scaffolding, greenhouse frames, and machinery applications.[reference:16]

- **Specifications:** 10×10mm to 150×150mm; Wall Thickness 0.8mm to 6.0mm; Length up to 12m[reference:17]
- **Galvanization:** Hot-dip (zinc coating 40-275 g/m²) or electro-galvanized[reference:18]
- **Base Material:** Q195, Q235, SS400, ASTM A36[reference:19]
- **Standards:** ASTM A500, ASTM A53, EN 10219, JIS G3463, ASTM A653, EN 10346, JIS G3302[reference:20]
- - [Galvanized Square Tubes Details](https://www.rd-steel.com/products/galvanized-square-tubes.html)

### 4. Seamless Line Pipes
High-pressure seamless pipes for oil & gas transmission, industrial fluid transport, power plants, and petrochemical systems.[reference:21]

- **Specifications:** Diameter 1/2" to 24" (DN15 to DN600); Wall Thickness SCH 10 to SCH XXS; Length 5.8m to 12.5m (customizable)[reference:22]
- **Material Grades:** Carbon Steel (ASTM A106 Gr. B, API 5L Gr. B/X42/X52/X60/X65/X70/X80); Alloy Steel (ASTM A335 P11/P22/P91); Stainless Steel (ASTM A312 TP304/316)[reference:23]
- **Pressure Rating:** API 5L PSL1 & PSL2 (up to X80)[reference:24]
- **Standards:** API 5L, ASTM A106, ASTM A53, ASME B36.10, ISO 3183[reference:25]
- - [Seamless Line Pipes Details](https://www.rd-steel.com/products/seamless-line-pipes.html)

### 5. Seamless Structure Pipes
High-strength seamless pipes for building frames, bridges, high-rise structures, and industrial machinery supports.[reference:26]

- **Specifications:** Diameter 10mm to 500mm; Wall Thickness 1mm to 50mm; Length 3m to 12m (customizable)[reference:27]
- **Material Grades:** Carbon Steel (ASTM A53, ASTM A106, API 5L Gr. B); Alloy Steel (ASTM A335 P11/P22/P91); Stainless Steel (ASTM A312 304/316/316L)[reference:28]
- **Standards:** ASTM, EN 10210, DIN 2448, JIS G3441[reference:29]
- - [Seamless Structure Pipes Details](https://www.rd-steel.com/products/seamless-structure-pipes.html)

### 6. Steel Sheet
Carbon steel, stainless steel, and checkered sheets for construction, bridge building, and food/pharma equipment.[reference:30]

- **Carbon Steel:** ASTM A36, A572, SS400, Q235, S355JR; Thickness 0.5mm-50mm[reference:31]
- **Stainless Steel:** 304/304L, 316/316L, 321, 310S, 410, 420, 430, 409; Thickness 0.3mm-20mm[reference:32]
- **Checkered Sheets:** Aluminum, Stainless Steel, Mild Steel; Thickness 1.5mm-12mm[reference:33]
- **Standards:** ASTM, EN, JIS, GB, ISO, AISI[reference:34]
- - [Steel Sheet Details](https://www.rd-steel.com/products/steel-sheet.html)

### 7. Steel Coils
Hot-rolled, cold-rolled, galvanized, pre-painted carbon steel coils and stainless steel coils for automotive, appliance, and construction industries.[reference:35]

- **Carbon Steel Coils:** HR (Q235, SS400, ASTM A36/A569/A1011); CR (SPCC, DC01, ASTM A1008/A109); Galvanized (SGCC, DX51D, ASTM A653); Pre-Painted (PPGI/PPGL)[reference:36]
- **Stainless Steel Coils:** 201, 304, 304L, 316, 316L, 430, 409, 439, 410, 420[reference:37]
- **Thickness:** HR 1.5mm-12mm; CR 0.2mm-3.0mm; Galvanized 0.3mm-4.0mm; Stainless 0.3mm-6.0mm[reference:38][reference:39]
- **Standards:** ASTM, JIS, EN, GB, ISO[reference:40]
- - [Steel Coils Details](https://www.rd-steel.com/products/steel-coils.html)

### 8. Flanges
Forged steel flanges for pipeline connections in high-pressure and high-temperature industrial systems.[reference:41]

- **Types:** Welding Neck, Blind, Lap Joint, Slip On, Socket Weld, Threaded, Plate[reference:42]
- **Size:** ½" to 60" (standard); custom up to 120"[reference:43]
- **Pressure Ratings:** Class 150, 300, 600, 900, 1500, 2500 (ANSI/ASME B16.5, B16.47)[reference:44]
- **Materials:** Carbon Steel (ASTM A105); Stainless Steel (ASTM A182 F304/316); Alloy Steel (ASTM A182 F11/F22); Duplex/Super Duplex (ASTM A182 F51/F53/F55); Nickel Alloys (Inconel, Monel, Hastelloy)[reference:45]
- **Standards:** ANSI/ASME B16.5, ANSI/ASME B16.47, API, DIN, EN, JIS, ISO[reference:46]
- - [Flanges Details](https://www.rd-steel.com/products/flanges.html)

## News & Blogs

- [How to Tell Real & Fake Galvanized Pipes by Eyes? | Hot-Dip vs Cold-Dip Guide](https://www.rd-steel.com/newsdetail/hot-dip-galvanized-fluid-pipe.html) — A practical guide to distinguishing genuine hot-dip galvanized pipes from cold-dip or fake seamless pipes using visual and manual checks.[reference:47]
- [Expanding Our Business with Ductile Iron Pipe and Fittings Solutions](https://www.rd-steel.com/newsdetail/ductile-iron-pipes-and-fittings.html) — Announcement of strategic expansion into Ductile Iron pipes, fittings, couplings, valves, and manhole covers.[reference:48]
- [How to Improve the Abrasion Resistance of Galvanized Welded Pipes](https://www.rd-steel.com/newsdetail/alvanized-welded-pipe-abrasion-resistance.html) — Technical exploration of coating upgrades and base material improvements to enhance wear resistance.[reference:49]

## Quality & Certifications

Our factory maintains a complete control system covering production, processing, packaging, and shipment[reference:50]. All raw materials come from ISO-compliant certified mills[reference:51]. We hold globally recognized certifications including API (American Petroleum Institute), BV (Bureau Veritas), and TÜV[reference:52].

## Contact

- **Company:** Tianjin Ruide Steel Pipe Manufacturing Co., Ltd.
- **Location:** Tianjin, China
- **Website:** https://www.rd-steel.com/

## Site Links

- [Homepage](https://www.rd-steel.com/): Overview of Tianjin Ruide Steel and its main offerings
- [Products](https://www.rd-steel.com/products/): Complete product catalog
- [News](https://www.rd-steel.com/news/): Industry news and company announcements