Name: Welding Stainless Steel Tube Seamless Stainless Pipe 304
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Welding Stainless Steel Tube Seamless Stainless Pipe 304

Weld Seam Types
Straight Seam Welded Pipe: The weld seam is straight, resulting in a simple and efficient production process, suitable for small-diameter pipes.
Spiral Welded Pipe: The weld seam is spiral, resulting in higher strength. It can be used to produce large-diameter steel pipes from narrow billets, but production speeds are slower.

By Material
Carbon Steel Welded Pipe: Examples include Q195 and Q235, widely used in construction and fluid transportation.
Stainless Steel Welded Pipe: Examples include Type 304 (containing 18-20% Cr and 8-10.5% Ni), offering high corrosion resistance and used in the chemical, food, and other industries.
Alloy Steel Welded Pipe: Examples include X42-X70 pipeline steel, suitable for high-pressure oil and gas transportation.

Product name	(carbon steel, stainless steel)Straight seam welded pipe, Seamless welded pipe, Spiral welded pipe
Standard	API, ASTM, BS, DIN, GB, JIS
Outside Diameter	20.3-800mm
Wall Thickness	2.24-30mm
Dia Tolerance	Control with in the standard, OD:+-1%, WT:+-10%
Materials	304,304L,309S,310S,316,316Ti,317,317L,321,347,347H,304N,316L, 316N,201,202,etc
	10#,20#,45#,Q235,Q345,Q195,Q215,Q345C,Q345A
	ASTM A53A/A53B/ A178C/A106B API5L
	ST37,ST37-2,DIN 1629 ST35, ST45,DIN 17175 ST35.8,DIN 17175 19Mn5
	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,A333GR.1,GR.3,GR.6,GR.7
	Gr.B,X42,X46,X52,X60,X65,X70,X80,X100
Processing Service	Welding, Punching, Cutting, Bending, Decoiling
Packing	Steel strip packed. Standard Export Seaworthy Package or as required
Application	Widely used in Structure, Accessorize,Construction, Fluid transportation,machinery parts,the stress parts of the automobile tractor parts and so on
MOQ	5 ton,sample order accepted
Shipment time	Within 7-10 workdays after receiving deposit or L/C

Round steel tube specifications
Nominal diameter	Inch outside diameter	Outside diameter	Wall thickness
15	1/2	20-22	0.7-2.75
20	3/4	24-26.5	0.7-2.75
25	1	21-33.4	0.7-3.75
32	1 1/4	40-42.5	0.7-4.0
40	1 1/2	46-48.3	0.7-7.0
50	2	57-60.3	0.7-7.0
65	2 1/2	74-76.3	0.7-7.0
80	3	86-89	0.7-8.0
100	4	111-114	0.8-9.0
125	5	138-140	0.9-9.0
150	6	164-165	1.0-11.5
200	8	218-219	1.1-12

Category	Element	Content Range (%)	Characteristics/Application Scenarios
‌Carbon Steel Welded Pipe‌	C	≤0.30	Carbon content affects weldability
	Mn	≤1.20	Enhances strength and toughness
	P	≤0.05	Harmful element control
	S	≤0.045	Sulfur causes hot brittleness
	Cu	≤0.40	Residual element limitation
	Ni/Cr	≤0.40	Trace alloying elements
‌Low Alloy High Strength Pipe‌	C	0.11-0.17	Pressure vessel applications
	Mn	1.23-1.70	Synergistic strengthening with C
	Si	0.13-0.20	Deoxidizing agent function
	V/Ti	Trace addition	Grain refinement
‌Stainless Steel Pipe (304 Type)‌	Cr	18.00-20.00	Core corrosion-resistant element
	Ni	8.00-10.50	Stabilizes austenitic structure
	C	≤0.08	Low-carbon prevents intergranular corrosion

Shandong Zhonglian Yongsheng Special Steel Co., Ltd. is a steel production enterprise that has been engaged in steel production, processing and sales for many years. Its main products include stainless steel series, carbon steel, galvanized steel and other profile products. It can also provide other metal products according to customer needs, with an annual export volume of about 1 million tons. It has five finishing production lines, three hot-dip galvanizing production lines, and two color coating production lines. It adopts advanced automatic width control system (AWC), automatic thickness control system (AGC), bending roll system, work roll guide roll system and other effective measures to ensure product quality. Its products are exported to more than 30 countries and regions including the United States, Canada, Spain, Russia, Iran, Saudi Arabia, Morocco, India, Pakistan, Malaysia, Singapore, Australia, New Zealand, etc. "Punctuality, integrity, and humanized service" have always been the development principles that the company and all employees have always adhered to.

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