TP304/304L,TP316/316L Stainless Steel Seamless Pipe,Custom High-Precision Cutting Survice

• Customization: Available
• Application: Automotive Industry, Chemical Industry, Food Industry, Oil and Gas Industry, Pharmaceutical Industry
• Certification: ISO9001
• Model NO.: GH-131
• Length: Random length/ Fixed Length
• Material: 304 Stainless Steel
• Outer Diameter: 6~630 mm
• Type: Seamless Pipe
• Wall Thickness: 0.89~80 mm
• Surface: AP / BA / MP
• Process: Cold-rolled or Cold-drawn
• Delivery condition: CFA / CFD / CFP
• Trade Term: EXW / FOB / FCA / CFR / CIF
• Value-added Services: High-precision Length Cutting
• Cutting Type: sawing machine cutting;laser cold cutting
• Transport Package: Seaworthy packaging
• Specification: SMLS PIPE
• Trademark: GH-STEEL
• Origin: Wenzhou, Zhejiang
• HS Code: 7304419000
• Production Capacity: 2000 Tons Per Month
• Package Size: 600.00cm * 45.00cm * 45.00cm
• Package Gross Weight: 1300.000kg

Product Description

Our precision cut stainless steel seamless tubes adopt two professional cutting processes.Large-diameter tubes are processed by sawing machine cutting, while small-diameter tubes adopt laser cold cutting technology. We provide custom fixed-length cutting, short segment cutting, thin-walled ring slices and micro small piece processing services. The finished products feature smooth burr-free cut surface, no deformation, no oxidation and high dimensional consistency. Widely applied in medical equipment, precision instruments, mechanical accessories, electronic hardware, chemical fittings and other high-precision assembly scenarios.

Product Description

Product Name	Stainlesss Steel Seamless Tube/Pipe with Cutting Processing
Company	Wenzhou Guohao Steel Co., Ltd. — Manufacturer and Exporter of Stainless Steel and Nickel Alloy Products • Tax ID: 91330303679583678U             • Special Equipment Manufacturing License No.: TS2733T07–2029
Custom Processing Services	• High-precision length cutting:   High-precision cut stainless steel seamless tubes. Large-diameter pipes are processed by sawing machine; small-diameter tubes (OD ≤ 30 mm) are processed by laser cold cutting. Custom fixed-length cutting, thin-slice machining, and micro-part processing are supported, ensuring excellent dimensional consistency. Available grades include 304, 316L, 310S, and S31803—suitable for medical devices, instrumentation, precision machinery, electronic hardware, and chemical fitting components.
Cutting Processing Type	Sawing Machine (Large OD Pipe) End face perpendicularity: ≤0.25mm/100mm (normal), ≤0.10mm/100mm (precision) Normal length tolerance: ±0.3~±0.5mm; Precision mode: ±0.15~±0.2mm Saw kerf loss: 1.8-2.7mm; Saw marks and burrs exist, deburr & chamfer required
	Laser Cold Cutting (OD ≤30mm Small Tube) Length tolerance: ±0.05~±0.10mm Advantanges:Low heat-affected zone, few burrs, suitable for thin slices & micro-pieces
Processing Tips	• Tolerance increases for thin-wall & extra-short pieces (L<5mm), laser cutting is recommended • Saw kerf loss shall be taken into account for length calculation • Deburr and chamfer suggested for precision-assembly applications
Grade	• American ASTM/ASME Standards: TP304, TP304L, TP304H, TP309S, TP310S, TP316L, TP316Ti, TP317L, TP321, TP321H, TP347H, N08904 (904L), S32550 (254SMO), S30815 (253MA) ,S31803,S32205,S32750
Standard	•ASTM A312,ASTM A213,ASTM A269,ASTM A789,ASTM A790 •GOST 9940-81,GOST 9941-2022 •EN 10216-5
Specification	• Nominal Pipe Size (NPS): 1/8 in to 24 in      Schedule Designations: SCH 10S, SCH 40S, SCH 80S, SCH 160, and SCH XXS (per ASME B36.19M/B36.10M)   • Mechanical Tubing Dimensions:     – Outside Diameter (OD): 6.35 mm to 108.0 mm (1/4 in to 4¼ in)     – Wall Thickness: 10 BWG to 20 BWG (in increments of 2 BWG)   • Metric Dimensions:     – OD Range: 6.0 mm to 630.0 mm     – Wall Thickness Range: 0.89 mm to 80.0 mm — applicable to both seamless pipe and precision tubing
Pipe End	•Plain End (PE) •Beveled End (BE)
Surface Treatment Processes	• Acid Pickling   • Mechanical Polishing   • Bright Annealing (in Controlled Atmosphere)   • Sand Blasting   • Shot Blasting and Shot Peening
Quality Verification Tests and Inspections	All goods pass pre-shipment inspection to comply with contract requirements and ISO/ASTM/EN/GB/T standards. Our core test items cover: Mechanical properties: Tensile strength, Yield strength, Elongation, Charpy impact test(as required) Hardness test: HBW, HRC/HRB, HV as required Chemical composition: OES analysis to ISO 11573 / ASTM E415 Flattening test: ASTM A269/A269M & GB/T 246-2023 IGC test: ASTM A262 A–E series per technical agreement Grain size inspection: ASTM E112 & GB/T 6394-2023 Hydrostatic test & NDT (UT/RT/PT), customized per product & technical agreement
Pipe's Markings	Brand + SML + Standard + Grade + Specification + HEAT/LOT NO.
Applications	Medical, instrument, precision machinery, electronic hardware, chemical fitting components

Applicable Standards and Dimensional Tolerances for Stainless Steel Seamless Tubes and Pipes
Standard	Outside Diameter Tolerance(mm)		Thickness Tolerance				Length Tolerance (mm)
ASTM A213	D<25.4	±0.1	D≤38.1		T:+20%/-0%		D≤50.80,L:+3/-0 D>50.8,L:+5/-0
	25.4≤D≤38.1	±0.15
	38.1<D≤50.8	±0.2	D>38.1		T:+22%/-0%
	50.8<D≤63.5	±0.25
	63.5<D≤76.2	±0.30
	76.2<D≤101.6	±0.38
	101.6<D≤190.5	+0.38/-0.64
	190.5<D≤228.6	+0.38/-1.14
ASTM A312 ASTM A790	10.29≤D≤48.26	+0.4/-0.8	10.3≤T≤73		T:+20%/ -12.5%		L:+6/-0
			88.9≤T≤457 T/D≤5%		T:+22.5%/-12.5%
	48.26<D≤114.3	±0.80	88.9≤T≤457 T/D>5%		T:+15%/-12.5%
	114.3<D≤219.1	+1.6/-0.8	508above T/D<5%		T:+22.5%/-12.5%
	219.1<D≤457.2	+2.4/-0.8	508above T/D>5%		T:+15%/-12.5%
ASTM A269 ASTM A789	D<12.7	±0.13	T:±15%				L:+3.2/-0 L:+4.8/-0
	12.7<D≤38.1	±0.13	T:±10%
	38.1<D≤88.9	±0.25
	88.9<D≤139.7	±0.38
	139.7<D≤203.2	±0.76
EN10216-5	D3	±0.75%/±0.30	T3		T:±10%/ ±0.20mm		L≤6m,+5/-0 6<L≤12m,+10/-0
	D4	±0.5%/±0.10	T4		T:±7.5% / ±0.15mm
GOST 9941-2022 (except 06XH28MAT)	D<10	Normal:±0.30 High:±0.20 Higher:±0.15	T<0.3		Normal:±0.05 mm High:±0.03 mm		L:+15/-0
	10<D≤30	Normal:±0.40 High:±0.30 Higher:±0.20	0.3<T≤0.4		Normal:±0.07 mm High:±0.05 mm
	30<D≤95	Normal:±1.2% High:±1% Higher:±0.8%	0.4<T≤0.6		Normal:±0.10 mm High:±0.07 mm
			0.6<T≤1.0		Normal:±0.15 mm High:±0.10 mm
	D>95   D/S<40	Normal:±1.2% High:±1% Higher:±0.8%	1<T≤3 D/S<40		Normal:+12.5%/-15% High:+12.5%/-10% Higher:±10%
			3<T≤7 D/S >40		Normal:+12.5%/-15% High:±12.5%
	D>95   D/S >40	Normal:±1.5% High:±1.2% Higher:±1.0%	T>7 D<325		Normal:+12.5%/-10% High:±10%
			T>7 D>325		Normal:+12.5%/-15% High:±12.5%

Packing & Delivery

WENZHOU GUOHAO STEEL CO.,LTD

Wenzhou Guohao Steel Co., Ltd. is a Chinese manufacturer of high-performance stainless steel seamless pipes for construction, petrochemical, and offshore engineering.
We source raw materials from Tsingshan and Yongxing, and control the full production process—from cold rolling and solution annealing to fully automated eddy current and ultrasonic NDT—ensuring compliance with GB/T 14976, ASTM A312, GOST 9941 and EN 10216-5 on tensile strength, yield strength, elongation, dimensional tolerance, intergranular corrosion resistance, and uniform corrosion resistance.
We produce seamless tubes in austenitic (e.g., 304, 316L, 321, 310S), duplex (e.g., S32205, S32750), and nickel-based (e.g., Inconel 625, Hastelloy C-276, KhN78T) grades. All products are manufactured according to customer specifications, including outer diameter (OD), wall thickness, length, surface roughness, end finish, and packaging. Certificates of conformity are issued in accordance with EN 10204 Type 3.1 or 3.2, and third-party pre-shipment inspections are conducted by IAF-accredited bodies such as SGS or Bureau Veritas (BV).

FAQ

1.Q: Do you offer customized product services?

A: We manufacture products to your specifications and drawings, including custom dimensions, controls, and OEM orders.

2.Q: Are you a manufacturer or trader?

A: We are manufacturers. We have our own factory to produce and process various kinds of stainless steel /nickel alloy pipes.

3.Q: Can we get some samples? Is there a charge?

A: Yes, we will provide you with the samples you want. The samples are free of charge, but the customer may have to pay the freight..

4.Q: Can we visit your factory?  

A: Of course, we welcome you to visit our factory on-site or visit our production line through online videos to learn more about our strength and quality. Once we have your schedule, we will arrange a professional sales team to follow up with you.

5.Q: How do you ensure the quality of the product?  

A: Our company's stainless steel pipe products are subject to full-process inspection in strict accordance with the enterprise quality manual. The factory inspection report is provided with the goods. If necessary, third-party inspections such as SGS can be accepted.

6.Q: What is your delivery time? 

A: Different products and procurement quantities have different delivery times. The product will be delivered as soon as possible on the basis of quality assurance. Usually, if the goods are in stock, it takes 3-10 days. Alternatively, if the goods are out of stock, it will take 25 to 45 days

7.Q: Can you arrange shipment?  

A: Of course, we have freight forwarders who have been cooperating for many years.

8.Q: What if I don't have import experience?  

A: We handle all import logistics for first-time buyers. With a valid import license, we manage documentation (commercial invoice, packing list, bill of lading), customs classification, freight forwarding, and delivery—ensuring secure, on-time, and compliant shipment.

9.Q: Do you have an export license for steel products?

· A: We are a factory and can directly apply for export licenses for steel products and export them in compliance with regulations.

10.Q: Do you have a VTB account?

· A: We hold a VTB Bank account, reducing cross-border collection fees and export-related costs.