Galvanized Round Pipe

Multi‑grade availability: GB, ASTM A53, EN, JIS standard grades for global market requirements
Full size coverage DN15‑DN600, Sch40 / Sch80; standard 6/12m or custom 1‑18m cutting service
Flexible pipe‑end options: plain end, bevel end, threaded BSPP/BSPT/NPT, flange welding, coupling pre‑assembly
HDG hot‑dip galvanized coating meets ISO1461, coating weight 85‑600g/m² for long‑term anti‑corrosion

Product Overview

Galvanized Round Pipe, also known as hot-dip galvanized (HDG) round steel pipe, is a corrosion-resistant carbon steel tubular product designed for outdoor structures, fluid transportation and infrastructure projects. Manufactured with hot-dip galvanizing technology, it provides enhanced protection against rust and corrosion in humid and outdoor environments.

Galvanized Round Pipe is produced according to international standards including GB/T3091-2024, ASTM A53, EN10255, JIS G3444 and ISO1461. Available material grades cover Chinese, American, European and Japanese standard systems, including Q195, Q235B, Q355B, ASTM A53 Gr.A/B, S235JR and STK400 to meet different global project requirements.

The product supports a wide size range from DN15 to DN600, with Sch40 standard wall thickness and optional Sch80 heavy-duty series. Standard lengths include 6m and 12m, while customized cutting from 1m to 18m is available for different installation requirements.

With flexible pipe-end processing, ISO1461 compliant hot-dip galvanized coating and multiple application possibilities, Galvanized Round Pipe is widely used in fire protection systems, municipal water pipelines, low-pressure gas networks, electrical conduits, agricultural greenhouses and steel structure projects.

Galvanized Round Pipe

Chemical & Mechanical Property Snapshot

Grade	C ≤	Si ≤	Mn ≤	P ≤	S ≤	Tensile Strength (MPa) ≥	Yield Strength (MPa) ≥	Elongation (%) ≥	Zinc Coating
Q195	0.15	0.30	0.60	0.045	0.045	315	195	33	85–600 g/m², ISO 1461
Q215	0.15	0.30	0.70	0.045	0.045	335	215	31	85–600 g/m², ISO 1461
Q235B	0.20	0.35	1.40	0.045	0.045	375	235	26	85–600 g/m², ISO 1461
Q355B	0.20	0.50	1.60	0.040	0.040	470	355	21	85–600 g/m², ISO 1461
ASTM A53 Gr.A	0.25	—	0.95	0.06	0.05	330	205	30	85–600 g/m², ISO 1461
ASTM A53 Gr.B	0.30	—	1.20	0.06	0.05	415	240	20	85–600 g/m², ISO 1461
S195T	0.15	0.35	0.70	0.045	0.045	315	195	33	85–600 g/m², ISO 1461
S235JR	0.17	0.35	1.40	0.045	0.045	360	235	26	85–600 g/m², ISO 1461
S275JR	0.21	0.35	1.50	0.045	0.045	410	275	23	85–600 g/m², ISO 1461
S355JR	0.24	0.55	1.60	0.040	0.040	470	355	21	85–600 g/m², ISO 1461
STK400	0.25	0.35	1.40	0.040	0.040	400	235	25	85–600 g/m², ISO 1461
STK490	0.18	0.55	1.60	0.040	0.040	490	325	23	85–600 g/m², ISO 1461
STPG370	0.25	0.35	1.40	0.040	0.040	370	215	28	85–600 g/m², ISO 1461
STPG410	0.30	0.35	1.40	0.040	0.040	410	245	25	85–600 g/m², ISO 1461

Detailed Technical Specifications

Item	Specification
Product Name	Galvanized Round Pipe
Product Category	Galvanized Steel Pipe
Material Grades	Q195, Q215, Q235B, Q355B
ASTM Material Grades	ASTM A53/A53M-22 Grade A, Grade B
European Material Grades	S195T, S235JR/S235JRG, S275JR, S355JR
Japanese Material Grades	STK400, STK490, STPG370, STPG410
Manufacturing Standards	GB/T 3091-2024, GB/T 13793, GB/T 8163, ASTM A53/A53M, ASME B36.10M, EN 10219-1/2, EN 10255, ISO 1461, BS EN 39, JIS G3444, JIS G3452
Production Type	Hot-Dip Galvanized Round Steel Pipe
Nominal Diameter Range	DN15-DN600
NPS Size Range	NPS 1/2″ – 24″
Outside Diameter Range	According to DN/NPS standard sizes
Wall Thickness	Sch40 standard wall thickness, Sch80 heavy-duty thickness available
Standard Length	6m / 12m
Customized Length	1m-18m available
Pipe End Options	Plain End, Bevel End, Threaded End (BSPP/BSPT/NPT), Flange Welding, Coupling Pre-assembly
Thread Processing	BSPP, BSPT, NPT thread options
Surface Treatment	Hot-dip galvanizing with zinc coating
Galvanizing Standard	ISO 1461
Zinc Coating Weight	Minimum 85g/m²; Regular 120-275g/m²; Heavy coating 300-600g/m²
Size Processing Service	Cutting, segmented processing, customized length
Quality Control	Dimensional inspection, coating weight inspection, appearance inspection
Packaging	Waterproof seaworthy export packaging
Main Applications	Fire protection pipelines, water supply and drainage systems, gas pipelines, cable protection conduits, greenhouse structures, agricultural facilities, guardrails, support structures, steel fabrication projects
MOQ	5 Ton
Payment Terms	T/T, L/C at Sight
Delivery Time	7–15 working days after receiving deposit

Dimension Table

DN	NPS	Outside Diameter (mm)	Sch40 Wall Thickness (mm)	Sch80 Wall Thickness (mm)
DN15	1/2″	21.3	2.75	3.73
DN20	3/4″	26.9	2.75	3.91
DN25	1″	33.7	3.25	4.55
DN32	1-1/4″	42.4	3.25	4.85
DN40	1-1/2″	48.3	3.50	5.08
DN50	2″	60.3	3.65	5.54
DN65	2-1/2″	73.0	5.16	7.01
DN80	3″	88.9	4.55	7.62
DN100	4″	114.3	4.50	8.56
DN125	5″	139.7	5.00	9.52
DN150	6″	168.3	4.50	11.13
DN200	8″	219.1	6.30	12.70
DN250	10″	273.0	6.30	12.70
DN300	12″	323.9	6.35	12.70
DN350	14″	355.6	7.94	12.70
DN400	16″	406.4	8.80	12.70
DN450	18″	457.2	10.00	17.20
DN500	20″	508.0	10.00	17.20
DN600	24″	609.6	Customized	Customized

Product Comparison Table

GB Grade	ASTM Grade	EN Grade	JIS Grade	Equivalent Feature
Q195	—	S195T	—	Low carbon, good ductility, suitable for greenhouses and light structures
Q215	—	—	—	Low carbon, excellent bending performance, suitable for fencing pipes
Q235B	ASTM A53 Gr.A	S235JR	STPG370	General purpose, widely used for water and fire pipelines
Q355B	ASTM A53 Gr.B	S355JR	STK490	High strength, suitable for heavy loads, guardrails, and steel structures
—	ASTM A53 Gr.B	S275JR	STK400	Medium strength, suitable for fluid transmission and building frames

App Market

Reliable Steel Coil Solutions For Diverse Industrial Applications

Fire Protection System Engineering

Low-Pressure Gas Transmission

Municipal Water Supply and Drainage Pipeline Network

Product Packaging

Secure Export Packaging For Safe Handling And Delivery

FAQs

What is Galvanized Round Pipe used for?

Galvanized Round Pipe is commonly used for fire protection systems, municipal water pipelines, low-pressure gas delivery, electrical conduits, agricultural greenhouse frames and steel structures.

What standards does Galvanized Round Pipe follow?

Galvanized Round Pipe can be manufactured according to GB/T3091-2024, ASTM A53, EN10255, JIS G3444 and ISO1461 standards.

What sizes are available for Galvanized Round Pipe?

The product covers DN15-DN600 sizes with Sch40 standard and Sch80 heavy-duty wall thickness options.

Can Galvanized Round Pipe be customized?

Yes. Customized lengths from 1m to 18m and different pipe-end processing options are available.

What galvanizing coating options are available?

The hot-dip galvanized coating can range from 85g/m² to 600g/m² depending on corrosion protection requirements.

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Galvanized Round Pipe