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Youfa Hot-Dip Galvanized Steel Pipes, compliant with GB/T 3091 national standard, specially designed for greenhouse supports and guardrails, rust-proof and durable, available in stock for direct delivery.

Engineered for optimal performance in agricultural and construction applications, Youfa Hot-Dip Galvanized Steel Pipes meet the rigorous standards of GB/T 3091, ensuring reliability and consistency. Tailored specifically for greenhouse supports and guardrails, these pipes combine robust structural integrity with exceptional rust-proof capabilities. The advanced hot-dip galvanization process forms a dense, uniform zinc coating that shields the steel from moisture, UV exposure, and atmospheric corrosion—critical for maintaining durability in outdoor environments where traditional pipes might succumb to rust and degradation.With a focus on rust resistance and longevity, these pipes are an ideal choice for clients who prioritize cost-effectiveness and reliability. The combination of national standard compliance, specialized design for greenhouse and guardrail applications, and ready-to-ship inventory makes Youfa’s galvanized steel pipes a trusted solution for professionals seeking durable, hassle-free materials.

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Galvanized steel pipe

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Youfa Hot-Dip Galvanized Steel Pipes, compliant with GB/T 3091 national standard, specially designed for greenhouse supports and guardrails, rust-proof and durable, available in stock for direct delivery.

Tianjin Xingrong Metal Products Co., LTD

Tianjin Youfa steel pipe group were founded on July 1st, 2000, with the headquarters location at the largest welded pipe production base in China-Daqiuzhuang Village, Tianjin city, which is a large-scale steel pipe manufacturing enterprise producing many kinds of pipe products GALVANIZED STEEL PIPE, ERW STEE LPIPE, SQUARE AND RECTANGULAR STEEL TUBE, GALVANIZED SQUARE PIPE, SPIRAL STEEL TUBES, STAINLESS STEEL PIPE, SCAFFOLDING, AND PIPE FITTINGS. have been rated as top 500 enterprises of China in the same industry,and as top 500 manufacturing of china.

Youfa brand was affirmed as a China renowned brand by SAIC trademark bureau in March 2008.

Product	Hot Dip Galvanized Steel Pipe
Material	16Mn,Q345B,T1,T2,T5,T9,T11,T12,T22,T91,T92,P1,P2,P5,P9,P11,P12,P22,P91,P92,15CrMO,Cr5Mo,10CrMo910,12CrMo,13CrMo44,30CrMo,A333 GR.1,GR.3,GR.6,GR.7
	Gr.B,X42,X46,X52,X60,X65,X70,X80,
	ASTM A53A/A53B/ A178C/A106B API5L
	ST37,ST37-2,DIN 1629 ST35, ST45,DIN 17175 ST35.8,DIN 17175 19Mn5
Grade	Q195 = S195 / A53 Grade A
	Q235 = S235 / A53 Grade B / A500 Grade A / STK400 / SS400 / ST42.2
	Q345 = S355JR / A500 Grade B Grade C
	Q235, Q345, S235JR, S275JR, STK400, STK500, S355JR, GR.B-D
Standard	EN39, BS1139, BS1387, EN10255,ASTM A53, ASTM A500, A36, ASTM A795,ISO65, ANSI C80, DIN2440, JIS G3444,
Inspection	ISO,BV,SGS,MTC
MOQ	100/ton-1000ton According to customer requirements
Surface	Zinc coating 200-500g/m2 (30-70um)
Ends	Plain ends
Ends	with or without caps
payment method	L/C D/P D/A TT

Galvanized Carbon Steel Pipe Size Chart :

DN	OD		ASTM A53 / API 5L / ASTM A795			BS1387 / EN10255
	OD		SCH10S	STD SCH40	SCH80	Light	Medium	Heavy
	MM	INCH	MM	MM	MM	MM	MM	MM
15	21.3	1/2"	2.11	2.77	3.73	2	2.6	-
20	26.7	3/4“	2.11	2.87	3.91	2.3	2.6	3.2
25	33.4	1"	2.77	3.38	4.55	2.6	3.2	4
32	42.2	1-1/4"	2.77	3.56	4.85	2.6	3.2	4
40	48.3	1-1/2"	2.77	3.68	5.08	2.9	3.2	4
50	60.3	2"	2.77	3.91	5.54	2.9	3.6	4.5
65	73 or 76	2-1/2"	3.05	5.16	7.01	3.2	3.6	4.5
80	88.9	3"	3.05	5.49	7.62	3.2	4	5
90	101.6	3-1/2"	3.05	5.74	8.08
100	114.3	4"	3.05	6.02	8.56	3.6	4.5	5.4
125	141.3	5"	3.4	6.55	9.53		5	5.4
150	168.3	6"	3.4	7.11	10.97		5	5.4
200	219.1	8"	3.76	8.18	12.7
250	273.1	10"	4.19	9.27	15.09

Application:

Construction / building materials steel pipe
Scaffolding steel pipe
Fence post steel pipe
Fire protection steel pipe
Greenhouse steel pipe
Low pressure liquid, water, gas, oil, line pipe
Irrigation pipe
Handrail pipe

PIPE ENDS TREATMENT:

*THREADED BOTH ENDS (BS or ASTM standard)One end with plastic caps, and the other end with coupling;
*GROOVED ENDS (BS or ASTM standard);
*PLAIN ENDS (regular situation);
*Add plastic caps or not;
*BEVEL ENDS WITH PLASTIC CAPS( 30 degree bevel suitable to welding ).

Strict Quality Control:
1) During and after production, 4 QC staffs with more than 5 years experience inspect products in random.
2) National accredited laboratory with CNAS certificates
3) Acceptable inspection from third party appointed/paid by buyer, such as SGS, BV.
4) Approved by Malaysia, Indonesia, Singapore, Philippines, Australia, Peru and UK. We own UL /FM, ISO9001/18001, FPC certificates.

PACKING AND DELIVERY: -- Round hollow section pipe
1. OD 219mm and below In hexagonal seaworthy bundles packed by steel strips, With two nylon slings for each bundles
2. above OD 219mm in bulk or according to custom opinion
3. 25 tons/container and 5 tons/size for a trial order;
4. For 20" container the max length is 5.8m;
5. For 40" container the max length is 11.8m.

About us:

Tianjin Youfa Steel Pipe Group Co., Ltd was founded on July 1st, 2000. There are totally about 8000 employees, 13 factories, 293 steel pipe production lines, 3 national accredited laboratory, and 1 Tianjin government accredited business technology center.

5 factories producing galvanized steel pipe under Youfa Group until 2021;
60 hot dipped galvanized steel pipe production lines;
4,240,000 tons annual output of gi pipe;
104,300 tons exported around the world.

Galvanized steel pipe