347/347H Stainless Steel Pipes

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347/347H Stainless Steel Pipes Surface Finish Characteristics & Compliance Standards

Metinox Overseas is a trusted manufacturer and supplier of stainless steel pipes that are suitable for the most demanding industrial needs in all industries all over the world. The 347/347H Stainless Steel Pipes have been produced with highest surface finish quality, dimensional accuracy and corrosion resistance properties. The SS pipes are manufactured using sophisticated manufacturing processes and heat treatments to obtain smooth and reflective surface finish. Further polishing and buffing can also be carried out to improve the reflection of the surface when being used for decorative or hygienic purposes.

Metinox Overseas 347/347H stainless steel pipe suppliers guarantee the quality of their materials are in accordance with national and international standards. Excellent mechanical strength and durability make our seamless stainless steel pipeline the best solution for chemical processing, food processing, petrochemical plants, refrigeration systems and high temperature industrial applications.

The seamless stainless steel pipe products have very high resistance to high temperature oxidation, pitting, crevice corrosion and thermal fatigue. We are one of the top stainless steel pipe suppliers, and our 347/347H SS pipes are produced with high-quality raw materials with a rigorous quality management system, ensuring their stable performance and durability. The excellent corrosion resistance and superior mechanical properties make these stainless steel pipes suitable for critical industrial environments where reliability and performance are essential.

347/347H Stainless Steel Pipes Heat Resistance & Mechanical Performance

347/347H Stainless Steel Pipe is particularly suited for applications where the pipe requires heat and cooling for short periods between temperatures ranging from 800°F to 1600°F. In high temperature applications with many thermal exposures, 347/347H stainless steel pipe is specifically recommended for use in the temperature range 427°C to 899°C. To resist carbide precipitation and intergranular corrosion during welding and high temperature service, these ss pipes contain niobium as a stabilizer.

Seamless stainless steel pipe products offer superior creep strength and enhanced stress rupture properties when compared to conventional grades, such as 304, 304L and 307 stainless steel pipe. The 347H has a higher carbon content which provides better mechanical stability at high temperatures, suitable for use in heat exchangers, boilers, pressure vessels, refinery equipment and power generation.

Metinox Overseas is one of the top manufacturers of ss pipe and provides high-quality and high-strength 347/347H stainless steel pipes with properties of high toughness, high corrosion resistance and thermal resistance. We are producing our products according to ASTM and ASME specifications to ensure our products are reliable to perform under extreme industrial conditions. Our stainless steel pipe products' reliable quality, anti-corrosion and competitive price have made them the preferred choice among industries looking for reliable stainless pipe suppliers.

Inspection Procedures, Manufacturing Practices & Packaging at Metinox Overseas

Every S/S pipe at Metinox Overseas is carefully inspected and tested to provide high quality products and adhere to international standards. When necessary, chemical, mechanical, hardness, Positive Material Identification (PMI), intergranular corrosion tests, hydrostatic tests, and other non-destructive examinations are performed as part of our quality assurance procedure.

As one of the reliable 347/347h stainless steel pipe distributors and 347/347h stainless steel pipe suppliers, our SS pipes are produced by the high-quality production line, which is equipped with the modern production equipment and precision production tools. To manufacture seamless stainless steel pipe without defects with excellent surface finish, dimension, long service life, we must continuously improve the process performance.

The professional staff ensures that all the requirements of the suppliers of ss pipes are met with high quality products, which are industrial standard and meet customer demands. Complete material test certificates and inspection reports are provided with all products, providing full traceability and compliance.

Care is taken to ensure that the stainless steel pipes can be packed in wooden boxes, crates and protective materials so that the material is not damaged during handling and transportation to ensure safe delivery. Metinox Overseas has a dedication to deliver high quality stainless seamless pipe solutions of superior service, competitive pricing and prompt delivery throughout the world.

347/347H Stainless Steel Pipe Price List

Note: Prices are subject to change based on market fluctuations. Contact us for the latest quote.

Product Description	Price (USD/Kg)	Price (INR/Kg)
SS 347 Seamless Pipe	$4.50 - $6.00	?375 - ?500
SS 347H Seamless Pipe	$5.00 - $6.50	?415 - ?540
SS 347 Welded / ERW Pipe	$3.80 - $5.00	?315 - ?415
SS 347H Welded / ERW Pipe	$4.20 - $5.50	?350 - ?460

Types Of 347/347H Stainless Steel Pipes

347/347H Stainless Steel Pipe Specification

Our inventory covers a wide range of sizes and schedules, manufactured to meet stringent global quality standards.

Specification	Details
Specifications	ASTM A312, A358 / ASME SA312, SA358
Outside Diameter	6.00 mm OD up to 914.4 mm OD, Sizes up to 24" NB available Ex-stock, OD Size Steel Tubes available Ex-stock
Thickness Range	0.3mm, 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Type	Seamless / ERW / Welded / Fabricated / CDW
Form	Round Pipes, Square Pipes, Rectangular Pipes
Length	Single Random, Double Random & Required Length
End	Plain End, Beveled End, Treaded
Outside Finish	2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Pipes, Finish as per customer Requirements
Delivery Condition	Annealed and Pickled, Polished, Bright Annealed, Cold Drawn
EN 10216-5	EN 10216 347/347H Seamless Steel Pipe, EN 10216-5 1.4550 / 1.4961 Seamless Steel Pipes for pressure purposes
EN 10217-7	EN 10217 347/347H Welded Steel Pipe, Steel EN 10217-7 1.4550 / 1.4961 Welded Pipes for pressure purposes

Stainless Steel UNS S34700 Pipe / Stainless Steel UNS S34709 Pipes Equivalent Grades

Global cross-references for international procurement and engineering compliance.

STANDARD	UNS	WERKSTOFF NR.	EN	JIS	GOST
SS 347	S34700	1.4550	X6CrNiNb18-10	SUS 347	08Ch18N12B
SS 347H	S34709	1.4961	X6CrNiNb18-12	SUS 347H	-

347 Stainless Steel Pipe and 347H Stainless Steel Pipe Chemical Composition

The defining characteristic of Grade 347 is the Niobium (Cb/Nb) content, which locks in corrosion resistance.

Grade	C	Mn	Si	P	S	Cr	Cb	Ni	Fe
SS 347	0.08 max	2.0 max	1.0 max	0.045 max	0.030 max	17.00 - 20.00	10xC - 1.10	9.00 - 13.00	62.74 min
SS 347H	0.04 - 0.10	2.0 max	1.0 max	0.045 max	0.030 max	17.00 - 19.00	8xC - 1.10	9.0 -13.0	63.72 min

ASME SA312 SS TP347 Pipes / ASME SA312 SS TP347H Pipes Mechanical Properties

Tensile Strength	Yield Strength (0.2% Offset)	Elongation	Hardness Rockwell B (HR B) max	Hardness Brinell (HB) max
Psi 75000, MPa 515	Psi 30000, MPa 205	35 %	92	201

AISI 347H Schedule 40 Pipe Pressure Ratings

The following data outlines the allowable working pressure (PSI) for Grade 347H at various temperatures.

Stainless Steel 347H Welded Tube Tolerance

Metinox Overseas ensures high precision in manufacturing to meet tight project tolerances.

Nominal Pipe Size Designator	Permissible Variations in Outside Diameter Over In.	Permissible Variations in Outside Diameter Under In.
1/8 to 1-1/2, incl	1/64 (0.015)	1/32 (0.031)
Over 1-1/2 to 4, incl	1/32 (0.031)	1/32 (0.031)
Over 4 to 8, incl	1/16 (0.062)	1/32 (0.031)
Over 8 to 18, incl	3/32 (0.093)	1/32 (0.031)

Applications & Uses of 347 / 347H Stainless Steel Pipe

The niobium-stabilized chemistry of SS 347 and 347H pipes implies them as the main solution in the environment where the high-temperature operation and sensitization is not an option. The design of these pipes ensures that they do not experience any intergranular corrosion even at the extreme end of the carbide precipitation range.

Aerospace Industry

These are extensively used in the exhaust stacks of aircrafts, collector rings, jet engine and rocket engine components because they are more thermally stable.

Oil and Gas Refineries

It is good in high pressure steam pipes, refinery equipment and catalytic cracking units that contain hydrogen sulfide and high temperatures.

Chemical Processing

It is used in the processing of organic and inorganic chemicals especially in equipment that has heat exchangers and reactors.

Power Generation

Power plants with high creep and stress rupture strength require essentials of power generation such as boiler tubes, superheater tubes and high-pressure steam lines.

Automotive Industry

It is used in exhaust manifolds and turbocharger parts which are heavy duty and subject to extreme cycles of heat.

Heat Treatment Plants

Applied to high-heat gaskets, expansion joints and furnace components that need to withstand oxidation to a maximum temperature of 1600-F.

Why Choose Metinox Overseas?

Since Metinox Overseas is a highly specialized manufacturer of ASTM A312 TP347 and TP347H pipes, it has both technical knowledge and modern metallurgy to provide high quality piping solutions.

• Niobium Stabilization Mastery: We have an accurate control over Niobium to Carbon ratios so that our pipes are fully resistant to intergranular corrosion both during the welding process and during high-heat service.
• Extensive Testing: Each pipe is tested on a 10-point quality check; PMI (Positive Material Identification), Intergranular Corrosion (IGC) tests; according to ASTM A262 Practice E, and Hydrostatic testing.
• Inventory Level: We maintain an enormous stock of SS 347H Seamless Pipes of different schedules (SCH 40, 80, 160) and sizes to guarantee the shortest lead times on urgent project specifications.
• Custom Fabrication: We offer custom-made solutions, such as special lengths, finely beveling work, as well as special surface finishes (Mirror, 2B, No.4), which are based on client specifications.
• Certified Traceability: Our products are all supplied with 3.1/3.2 Mill Test Certificate (MTC) according to EN 10204 and this provides full transparency to international EPC contractors.

Looking for High-Quality Stainless Steel 347/347H Pipes?

Choose Metinox Overseas - Your Reliable SS 347/347H Pipe Manufacturer & Exporter.

Let us support your projects with quality, precision, and performance.

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Export Destinations - USA, Europe, Middle East, LATAM

We are a major exporter of SS 347/347H pipes to high-consumption regions:

• Middle East: UAE (Dubai, Abu Dhabi), Saudi Arabia (Riyadh, Jubail), Qatar, Oman, Kuwait.
• Americas (LATAM & USA): USA (Houston, New York), Brazil, Mexico, Argentina, Canada.
• Europe: Germany, Italy, UK, Netherlands, Belgium, France.
• Asia & Africa: Singapore, Malaysia, South Africa, Nigeria, Egypt, Thailand.

SS 347/347H Pipe Delivery Time & CIF Pricing by Country

The Metinox Overseas has established an effective global logistics network that has enabled it to supply ASTM A312 TP347/347H Pipes to its customers in a timely fashion all over the world. We have highly flexible INCOTERs that can be customized to suit your purchasing requirements including CIF (Cost, Insurance and Freight), FOB (Free on board), CFR (Cost and Freight) and DDP (Delivered Duty Paid). We have strategic alliances with shipping lines and other freight forwarders and this provides us with competitive freight rates and a consistent transit time to all ports in the world that are major.

Destination Region	Major Ports / Cities	Estimated Delivery Time	Typical CIF Terms
Middle East (GCC)	Dubai (Jebel Ali), Dammam, Doha, Muscat, Kuwait	7 - 10 Days	CIF Dubai / CIF Dammam / CIF Doha
Europe	Rotterdam, Hamburg, Antwerp, Southampton, Genoa	20 - 25 Days	CIF Rotterdam / CIF Hamburg
USA & Canada	Houston, New York, Los Angeles, Long Beach, Vancouver	25 - 30 Days	CIF Houston / CIF New York / CIF LA
Latin America (LATAM)	Santos (Brazil), Veracruz (Mexico), Buenos Aires, Callao	30 - 35 Days	CIF Santos / CIF Veracruz
Southeast Asia	Singapore, Port Klang, Bangkok, Manila, Jakarta	10 - 15 Days	CIF Singapore / CIF Port Klang
Africa	Lagos, Durban, Mombasa, Dar es Salaam, Alexandria	15 - 20 Days	CIF Lagos / CIF Durban

Note: The delivery time is approximated and may vary based on the shipping lines, congestion and the custom clearance process at the port. In case of immediate needs, we provide the air freight services with the delivery in 5-7 days to the largest international airports. Get in touch with our export department to have tailor-made logistics and prevailing CIF prices of SS 347 Seamless Pipes, SS 347H Welded Pipes and SS 347/347H ERW Pipes.

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Supplier and Exporter of Stainless Steel 347 Pipe / 347H Stainless Steel Pipe in Cities Like

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Supplier and Exporter of SS 347 / 347H SS Pipes in Countries Like

Chile, Azerbaijan, Egypt, Puerto Rico, Turkey, Angola, Peru, Colombia, Italy, Bahrain, Hungary, Gabon, Iran, Austria, Hong Kong, Netherlands, Nepal, Russia, Czech Republic, United Arab Emirates, Nigeria, Spain, China, Macau, Germany, Canada, Argentina, Oman, Australia, Poland, Libya, Lithuania, Ukraine, Mexico, Kenya, Kuwait, New Zealand, Belgium, Kazakhstan, Qatar, Belarus, Mexico, Chile, Ecuador, Zimbabwe, Trinidad & Tobago, Tunisia, Israel, Bolivia, Saudi Arabia, Norway, Portugal, Ghana, Gambia, Venezuela, United Kingdom, South Africa, Bulgaria, Bhutan, Indonesia, Mongolia, Thailand, Romania, Poland, France, Greece, Switzerland, Vietnam, Singapore, Malaysia, Japan, Lebanon, Morocco, Iran, Afghanistan, Finland, Jordan, Sweden, Slovakia, Ireland, South Korea, Namibia, Costa Rica, Taiwan, Croatia, Iraq, United States, Yemen, Denmark, Serbia, Tibet, Sri Lanka, India, Nigeria, Algeria, Brazil, Bangladesh, Pakistan, Estonia, Philippines.

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