Thick Wall Seamless Stainless Steel Piping

• Customization: Available
• Type: Stainless Steel Pipes
• Standard: ASTM, AISI, GB, DIN, GOST9941
• Model NO.: Thick wall seamless pipe
• Certification: ISO
• Shape: Round
• Technique: Cold-Drawing
• Surface Treatment: Ap/Ba/Polishing/Sand Blasting/Shot Blasting
• Material: Stainless Steel
• Test: Ht/Et/Ut
• Delivery Time: Stock 7 Days; Mto 30 Days
• Trade Terms: EXW, Fob, CFR, CIF etc.
• Markings: According to A999/A999m
• Transport Package: Packed in Bundles or Plywooden Box
• Specification: AISI 304/304L/316L/321
• Trademark: GH-STEEL
• Origin: China
• HS Code: 7304419000
• Production Capacity: 2000ton Per Month

Product Description

Product Description

Heavy wall seamless pipes are a type of steel pipe that is manufactured without a welded seam, featuring a thick wall construction for increased durability and strength. These pipes are typically used in high-pressure applications and demanding environments due to their superior performance characteristics. Heavy wall seamless pipes are available in various materials, sizes, and wall thicknesses, making them suitable for a wide range of industrial applications.

What is considered heavy wall pipe?
A. Wall thickness specifications
A heavy wall pipe is determined by its wall thickness relative to its diameter. While there is no specific standard that defines a pipe as "heavy wall," it is generally considered as having a wall thickness-to-diameter ratio greater than 0.1. The wall thickness of heavy wall pipes can vary greatly, ranging from a few millimeters to several inches, depending on the application and material.
In the industry, pipes are often categorized based on their Schedule Number, which is a standardized system that relates to the wall thickness. For instance, Schedule 40, 80, and 160 pipes have increasing wall thicknesses, with Schedule 160 being one of the heaviest and most commonly referred to as "heavy wall" in certain applications.
It is essential to note that the specific wall thickness requirements may vary depending on the industry, application, and relevant standards or codes. Thus, it is crucial to consult the appropriate guidelines and specifications when determining the suitable heavy wall pipe for a particular application.

Product Name	Seamless Stainless Steel Pipes /Tubes
Company Inform	1.Name:WENZHOU GUOHAO STEEL., LTD   2.Type: Manufacturer
Material	Austenitic: TP304, TP304L, TP304H, TP309S, TP310S, TP316L, TP316Ti, TP317L, TP321, TP321H, TP347H , 904L, 254SMO GOST Grade: 08х18н10т,12х18н10т(AISI 321), 10х17н13м2т(AISI 316Ti), , 20х23н18(AISI 310S), 06хн28мдт(AISI 904L), 08х18н10(AISI304) EN Grade: 1.4301,1.4306,1.4311,1.4541,1.4401,1.4404,1.4550,1.4571,1.4429,1.4435,1.4436,1.4439
	Duplex Stainless: UNS S31803,UNS S2205,UNS S32750, UNS S32760
	Nickel Alloy: Incoloy: 800/800H/800HT 825 926 20 28 201 200 Inconel :718 600 601 625 Hastelloy: C-22 C-276 B-2 B-3 GH3030 GH3039 Cr20Ni80 ; Monel400,K-500
Standard	ASTM A312,ASTM A213,ASTM A269,ASTM A511,ASTM A789,ASTM A790 EN 10216-5,DIN 17456 GB/T 14976,GB13296,GB/T21833 GOST 9940,GOST 9941
Specification	D(Outer Diameter)	6mm-630mm ; 1/8inch-24inch
	T(Wall Thickness)	1mm-40mm ;  SCH5S, SCH10S, SCH40S, SCH80S, SCH160, SCHXXS
	L(Length)	Random length 5~7m Fixed length 6m /6.096m /6.1m/12m  or as customer's actual request
Surface	Annealing&Pickling Polishing(180#-600#) Bright Annealing Sand Blasting Shot Blasting
Pipe end	Plain Ends (PE) Bevelled Ends (BW) Threaded Ends (TE)
Markings	Markings will adhere to prescribed specifications in A999/A999M and shall include the NPS or OD and schedule number or average wall thickness, heat number, and NH (when hydrotesting is not performed) and ET (when eddy-current testing is performed) or UT (when ultrasonic testing is performed). The marking shall also include the manufacturer's private identifying mark, the marking requirement of section 12.3 on Hydrostatic or Nondestructive Electric Test, if applicable, and whether seamless (SML), welded (WLD), or heavily cold-worked (HCW). For Grades TP304H, TP316H, TP321H & TP347H, the marking shall also include the heat number and heat-treatment lot identification.
Flattening Test	For material heat treated in a continuous furnace flattening tests shall be made on a sufficient number of pipes to constitute 5% of the lot, but in no case less than 2 lengths of pipe.
Hydrostatic or Nondestructive Testing	Each pipe shall be subjected to the nondestructive electric test or the hydrostatic test
Delivery Time	For ready stock :7 days after receiving the deposit of T/T For MTO: 35 days after receiving the  deposit of T/T
Trade Terms	EXW,FOB, CFR, CIF etc.
Loading Port	Ningbo/Wenzhou/Shanghai
Remittance method	TT/LC/CASH
Container	20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High) 24-26CBM 40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High) 54CBM  40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High) 68CBM
Referenced Documents	ASTM Referenced Standards A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels A370 Test Methods and Definitions for Mechanical Testing of Steel Products A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys A999/A999M Specification for General Requirements for Alloy and Stainless-Steel Pipes A1016/A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless-Steel Tubes E112 Test Methods for Determining Average Grain Size E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

Product Parameters

 ASTM A511 Chemical Composition:

Grade	C	Mn,max	P,max	S,max	Si, max	Ni	Cr	Mo	Ti	Nb	Se
MT 302	0.08 to 0.20	2.00	0.040	0.030	1.00	8.0-10.0	17.0-19.0	...	...	...	...
MT 303	0.15 max	2.00	0.20	0.15 min	1.00	8.0-10.0	17.0-19.0	...	...	...	...
MT 303Se	0.15 max	2.00	0.040	0.040	1.00	8.0-11.0	17.0-19.0	...	...	...	0.12-0.2
MT 304	0.08 max	2.00	0.040	0.030	1.00	8.0-11.0	18.0-20.0	...	...	...	...
MT 304L	0.035 maxA	2.00	0.040	0.030	1.00	8.0-13.0	18.0-20.0	...	...	...	...
MT 305	0.12	2.00	0.040	0.030	1.00	10.0-13.0	17.0-19.0	...	...	...	...
MT 309S	0.08 max	2.00	0.040	0.030	1.00	12.0-15.0	22.0-24.0	...	...	...	...
MT 310S	0.08 max	2.00	0.040	0.030	1.00	19.0-22.0	24.0-26.0	...	...	...	...
MT 316	0.08 max	2.00	0.040	0.030	1.00	11.0-14.0	16.0-18.0	2.0-3.0	...	...	...
MT 316L	0.035 maxA	2.00	0.040	0.030	1.00	10.0-15.0	16.0-18.0	2.0-3.0	...	...	...
MT 317	0.08 max	2.00	0.040	0.030	1.00	11.0-14.0	18.0-20.0	3.0-4.0	...	...	...
MT 321	0.08 max	2.00	0.040	0.030	1.00	9.0-13.0	17.0-20.0	...	5XC - 0.60	...	...
MT 347	0.08 max	2.00	0.040	0.030	1.00	9.0-13.0	17.0-20.0	...	...	10XC - 1.00	...

A For small diameter or thin wall tubing or both, where many drawing passes are required, a maximum of 0.040 % carbon is necessary in grades MT-304L and MT-316L. Small outside diameter tubes are defined as those under a 0.500 in. [12.7 mm] outside diameter and light-wall tubes as those under a 0.049 in. [1.2 mm] average wall thickness (0.044 in. [1.1 mm] min wall thickness).
Permissible Variations in Outside Diameter, Ovality, Wall Thickness, and Cut-Length Variations
(Cold-Finished Round Tubing)A

Outside Diameter,in.	Outside Diameter, Tolerance,B in. Over and Under	Ovality,B Double Outside Diameter Tolerance when wall is:	Wall Thickness in %C,D		Permissible Variations in Cut Length, in.E
			Over	Under	Over	Under
Under 1⁄2	0.005	less than 0.015 in.	15	15	1⁄8	0
1⁄2 to 11⁄2 , excl	0.005	less than 0.065 in.	10	10	1⁄8	0
11⁄2 to 31⁄2 , excl	0.01	less than 0.095 in.	10	10	3⁄16	0
31⁄2 to 51⁄2 , excl	0.015	less than 0.150 in.	10	10	3⁄16	0
51⁄2 to 8, exc	0.03	less than 0.240 in.	10	10	3⁄16	0
8 to 85⁄8 , excl	0.045	less than 0.300 in.	10	10	3⁄16	0
85⁄8 to 123⁄4 , incl	0.062	less than 0.350 in.	10	10	3⁄16	0

Permissible Variations in Outside Diameter, Wall Thickness, and Cut-Length Variations
(Hot-Finished Round Tubing)

Specified Size, Outside Diameter, in.	Ratio of Wall Thickness to Outside Diameter	Outside Diameter and Wall Thickness Tolerances										Permissible Variations   in Cut Length, in.A
		Wall Thickness, %
		Outside Diameter, in.		0.109 in. and under		0.109 to 0.172 in., incl		Over 0.172 to 0.203 in., incl		Over 0.203 in.
		over	under	over	under	over	under	over	under	over	under
Under 3	all wall thicknesses	0.023	0.023	16.5	15	15	15	14	14	12.5	12.5	3⁄16	0
3 to 51⁄2 , excl	all wall thicknesses	0.031	0.031	16.5	15	15	15	14	14	12.5	12.5	3⁄16	0
51⁄2 to 8, excl	all wall thicknesses	0.047	0.047	…	…	…	…	14	14	12.5	12.5	3⁄16	0
8 to 103⁄4 , excl	5 % and over	0.047	0.047	…	…	…	…	…	…	12.5	12.5	3⁄16	0
103⁄4 to 123⁄4 , incl	under 5 %	0.063	0.063	…	…	…	…	…	…	12.5	12.5	3⁄16	0

A These tolerances apply to cut lengths up to and including 24 ft (7.3 m). For lengths over 24 ft, an additional over tolerance of 1⁄8 in. (3.1 mm) for each 10 ft (3 m) or faction thereof shall be permissible, up to a maximum tolerance of 1⁄2 in. (12.7 mm).
Straightness Tolerances (Cold-/Finished or Hot-/Finished Round Tubing)A

Size Limits	Max Curvature in any 3 ft, in.	Max Curvature in Total Lengths, in.	Max Curvature for Lengths under 3 ft
OD 5 in. and smaller. Wall thickness, over 3 % of OD but not over 0.5 in.	0.03	0.030 3 [(Number of feet of length)/3]	Ratio of 0.010 in./ft
OD over 5 in. to 8 in., incl. Wall thickness, over 4 % of OD but not over 0.75in.	0.045	0.045 3 [(Number of feet of length)/3]	Ratio of 0.015 in./ft
OD over 8 in. to 123⁄4 , incl. Wall thickness, over 4 % of OD but not over 1 in.	0.06	0.060 3 [(Number of feet of length)/3]	Ratio of 0.020 in./ft

A The usual procedure for measuring straightness is by means of a 3-ft (0.9 m) straight edge and feeler gage. If determined by the dial indicator method, the values obtained will be approximately twice those determined by the straightedge feeler gage method.
Permissible Variations in Outside Dimensions for Square and Rectangular Seamless Mechanical Tubing AB

Largest Outside Dimension Across Flats, in.	Tolerances, Outside Dimension Seamless Mechanical Tubing Plus and Minus, in.	Tolerances, Outside Dimension Seamless Mechanical Tubing Plus and Minus, in.
	For Wall Thickness, Given, in.	Tolerance for Outside Dimension (Including Convexity or Concavity) Plus and Minus, in.
To 3⁄4 , incl	0.065 and lighter	0.015
To 3⁄4 , incl	over 0.065	0.01
Over 3⁄4 to 11⁄4 , incl	all thicknesses	0.015
Over 11⁄4 to 21⁄2 , incl	all thicknesses	0.02
Over 21⁄2 to 31⁄2 , incl	0.065 and lighter	0.03
Over 21⁄2 to 31⁄2 , incl	over 0.065	0.025
Over 31⁄2 to 51⁄2 , incl	all thicknesses	0.03
Over 51⁄2 to 71⁄2 , incl	all thicknesses	1%

A The wall thickness tolerance is plus and minus 10 % of nominal wall thickness.
B The straightness tolerance is 0.075 in. 3 ft. using a 3-ft straight edge and feeler gage
 

ANSI/ASME B36.10M B36.19M Dimension Coparison Table

Norminal Pipe Size	Outside Diameter	Wall Thicknesses Schedule ANSI/ASME B36.10M,B36.19M
DN(in.)	D	sch5s	sch10s	sch10	sch20	sch30	sch40s	STD	sch40	sch60	sch80s	XS	sch80	sch100	sch120	sch140	sch160	XXS
1/8	10.3	---	1.24	---	---	---	1.73	1.73	1.73	---	2.41	2.41	2.41	---	---	---	---	---
1/4	13.7	---	1.65	---	---	---	2.24	2.24	2.24	---	3.02	3.02	3.02	---	---	---	---	---
3/8	17.1	---	1.65	---	---	---	2.31	2.31	2.31	---	3.2	3.2	3.2	---	---	---	---	---
1/2	21.3	1.65	2.11	---	---	---	2.77	2.77	2.77	---	3.73	3.73	3.73	---	---	---	4.78	7.47
3/4	26.7	1.65	2.11	---	---	---	2.87	2.87	2.87	---	3.91	3.91	3.91	---	---	---	5.56	7.82
1	33.4	1.65	2.77	---	---	---	3.38	3.38	3.38	---	4.55	4.55	4.55	---	---	---	6.35	9.09
1¼	42.2	1.65	2.77	---	---	---	3.56	3.56	3.56	---	4.85	4.85	4.85	---	---	---	6.35	9.7
1½	48.3	1.65	2.77	---	---	---	3.68	3.68	3.68	---	5.08	5.08	5.08	---	---	---	7.14	10.15
2	60.3	1.65	2.77	---	---	---	3.91	3.91	3.91	---	5.54	5.54	5.54	---	---	---	8.74	11.07
2½	73	2.11	3.05	---	---	---	5.16	5.16	5.16	---	7.01	7.01	7.01	---	---	---	9.53	14.02
3	88.9	2.11	3.05	---	---	---	5.49	5.49	5.49	---	7.62	7.62	7.62	---	---	---	11.13	15.24
3½	101.6	2.11	3.05	---	---	---	5.74	5.74	5.74	---	8.08	8.08	8.08	---	---	---	---	---
4	114.3	2.11	3.05	---	---	---	6.02	6.02	6.02	---	8.56	8.56	8.56	---	11.13	---	13.49	17.12
5	141.3	2.77	3.4	---	---	---	6.55	6.55	6.55	---	9.53	9.53	9.53	---	12.7	---	15.88	19.05
6	168.3	2.77	3.4	---	---	---	7.11	7.11	7.11	---	10.97	10.97	10.97	---	14.27	---	18.26	21.95
8	219.1	2.77	3.76	---		7.04	8.18	8.18	8.18	10.31	12.7	12.7	12.7	15.09	18.26	20.62	23.01	22.23
10	273.1	3.4	4.19	---	6.35	7.8	9.27	9.27	9.27	12.7	12.7	12.7	15.09	18.26	25.4	28.58	25.4
12	323.9	3.96	4.57	---	6.35	8.38	9.53	9.53	10.31	14.27	12.7	12.7	17.48	21.44	25.4	28.58	33.32	25.4
14	355.6	3.96	4.78	6.35	7.92	9.53	---	9.53	11.13	15.09	---	12.7	19.05	23.83	27.79	31.75	35.71
16	406.4	4.19	4.78	6.35	7.92	9.53	---	9.53	12.7	16.66	---	12.7	21.44	26.19	30.96	36.53	40.49
18	457.2	4.19	4.78	6.35	7.92	11.13	---	9.53	14.27	19.05	---	12.7	23.83	29.36	34.93	39.67	45.24
20	508	4.78	5.54	6.35	9.53	12.7	---	9.53	15.09	20.62	---	12.7	26.19	32.54	38.1	44.45	50.01
22	558.8	4.78	5.54	6.35	9.53	12.7	---	9.53	---	22.23	---	12.7	28.58	34.93	41.28	47.63	53.98
24	609.6	5.54	6.35	6.35	9.53	14.27	---	9.53	17.48	24.61	---	12.7	30.96	38.89	46.02	52.37	59.54
26	660.4	---	---	7.92	12.7	---	---	9.53	---	---	---	12.7
28	711.2	---	---	7.92	12.7	15.88	---	9.53	---	---	---	12.7
30	762	6.35	7.92	7.92	12.7	15.88	---	9.53	---	---	---	12.7
32	812.8	---	---	7.92	12.7	15.88	17.48	9.53	17.48	---	---	12.7
34	863.6	---	---	7.92	12.7	15.88	17.48	9.53	17.48	---	---	12.7
36	914.4	---	---	7.92	12.7	15.88	19.05	9.53	19.05	---	---	12.7
38	965.2	---	---	---	---	---	---	9.53	---	---	---	12.7	Note: sch5s,10s,40s,80s Used for steel pipe fittings
40	1016	---	---	---	---	---	---	9.53	---	---	---	12.7
42	1066.8	---	---	---	---	---	---	9.53	---	---	---	12.7
44	1117.6	---	---	---	---	---	---	9.53	---	---	---	12.7
46	1168.4	---	---	---	---	---	---	9.53	---	---	---	12.7
48	1219.2	---	---	---	---	---	---	9.53	---	---	---	12.7

 

Packaging & Shipping

1. All of our stainless steel seamless pipe & tubes are packaged as per international standard to prevent any possible damage or loss. By default, we will use thick woven plastic bag to bundle the finished pipes together in batches.
2. For some special pipes & tubes that are vulnerable to dirt, scratches, stress or rough handling, we will suggest wooden case for protection. Kindly note, wooden case can incur extra cost, not only its own cost, but also the increased freight cost, which is especially true for air transportation.
3. For enhanced customer experience, we also provide dedicated package as per your special requirements.

Certifications

The inspection of our company and products is open to customers themselves or their designated third-party inspectors, such as SGS, BV, TUV, DNV, etc., who are well-known in the industry.

PRODUCT APPLICATION

• Oil and Gas: Heavy wall seamless pipes are commonly used in the oil and gas industry for transporting crude oil, natural gas, and other petroleum products, as they can withstand the high pressures and corrosive environments associated with these applications.
• Power Generation: In power plants, heavy wall seamless pipes are essential for transporting steam, water, and other fluids under high pressure and temperature conditions, ensuring the safe and efficient operation of power generation systems.
• Chemical and Petrochemical: The chemical and petrochemical industries rely on heavy wall seamless pipes for their corrosion resistance and ability to handle aggressive chemicals and high temperatures, ensuring the safe transportation of various chemicals and byproducts.
• Water Treatment and Distribution: Heavy wall seamless pipes are used in water treatment and distribution systems for their strength and durability, allowing them to handle the high pressures often found in these applications.
• Construction and Infrastructure: In construction projects, heavy wall seamless pipes are used for their load-bearing capabilities and resistance to external pressures, making them suitable for applications such as piling, structural supports, and bridge construction.
• Automotive and Aerospace: Heavy wall seamless pipes are utilized in the automotive and aerospace industries for manufacturing high-strength components, such as engine parts, chassis components, and hydraulic systems, which require excellent mechanical properties and resistance to fatigue.

• The widespread use of heavy wall seamless pipes across various industries highlights their importance in modern engineering.

Company Profile

Wenzhou Guohao Steel was established in 2008. We are ISO 9001:2015 approved manufacturer, having a state-of-the-art infrastructure facility for having smooth production process. It has successfully grown by focusing on serving customers across a range of high technology industries. One of our company strengths is its people, with many colleagues having been with the company from the beginning. This provides our customers with the benefit of a wealth of experience and industry knowledge. Guohao Steel now has the whole of manufactured stainless steel products to add to its already large range of High Performance Nickel Alloys.
Guohao Steel adhere to the high standards of integrity and compliance required, including:

1. Environmental standards
2. Health and safety standards
3. Ethical trading standards
4. Export compliance requirements

We now stock and have direct access to a wide range of other materials, including stainless steels and nickel alloys. We supply and process pipes for numerous key industry sectors, collaborating with both small businesses and large international manufacturers across various countries. Due to our reputation for quality, reliability, and industry approvals, we are a well-regarded supplier in diverse sectors. Our delivery of long-term tangible benefits enables our customers to compete in today's challenging global marketplace.
In order to achieve our goals, we are improving our facilities and expanding our machinery to offer broader processing capabilities. Additionally, our investment extends to the growth and development of our teams, which represent our most valuable resource. We aim for our customers to receive the best experience and trust in the expertise, knowledge, and experience of our teams. As we continue looking towards the future, we rely on our core values to guide both decisions and actions.

Our Advantages

1. More than 16 Years of Experience in Stainless Steel Production.
2. Provides cost-effective products and professional services to you.
3. We offer an extensive range of stainless steel, super duplex steel,nickel alloy.

FAQ

1.Q: Do you provide customized product services?
A: Of course, we can design and produce the products you need based on your specifications and drawings. For example: special dimensions, special controls, OEM, etc.

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 the 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: All products must undergo three inspections throughout the entire manufacturing process, including production, cutting, and packaging. 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. We are VIP and can provide you with the most favorable prices and professional services.

8.Q: What if I don't have import experience?
A: We have rich export experience. As long as you have an import license, please leave the rest to us! We will help you choose the most suitable transportation service to safely and accurately deliver the product to the place where it is needed.