Stainless Steel 347 Pipes / Stainless Steel 347H Pipes

Stainless steel 347 and 347H pipes hold up where welding heat or long service at high temperature would sensitise standard 304 or 316 stainless steel pipes. Niobium stabilises the carbon in both alloys, so chromium carbides do not precipitate at grain boundaries during welding or thermal cycling. That stabilisation removes the intergranular corrosion risk that limits unstabilised grades in welded assemblies. 347H carries a higher carbon range than standard 347, which raises strength at sustained high temperatures.

These grade 347 pipes also are used for parts which are intermittently heated and cooled to temperatures between 800 degree F and 1600 degree F. Grade 347H pipes can be used in applications requiring repeated heating in the range of 427 Degree C -899 Degree C. Alloy 347 Pipes offers higher creep and stress rupture properties than Alloy 304. Meanwhile, these Alloy 347H pipes can consider for exposures where sensitization and intergranular corrosion are concerns.347 stainless steel pipes is generally used for parts which are intermittently heated up to 1500 degree F. 347H stainless steel pipes offers good mechanical properties with higher creep and stress rupture characteristics than other grades.

These pipes undergo various tests such as chemical and mechanical tests, hardness tests, positive material identification tests, intergranular corrosion tests, and many more. We ensure to share test reports and certificates along with the product at the time of dispatch. Our company focuses on providing defect-free and dimensionally accurate products. Using modern tools and advanced machinery, we fabricate this ss 347h seamless pipe in our highly developed manufacturing unit. We keep upgrading our manufacturing methodology and tools to offer the best service.

Check out our - Stainless Steel 904L Pipe.

Stainless steel 347/347H pipes are processed by qualified crude materials; with the advancement of machinery and technology these acquire high dimensional accuracy and surface finish. Silver Tubes offer SS pipes at the most reasonable price, you can place bulk orders here. And the important part manufacturer performs the various tests like mechanical, chemical test, IGC test, positive material test, and third-party inspections. The wooden boxes, crates, cardboard boxes are used in packaging to avoid damages.

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347/347H Stainless Steel Pipe Price List

Types Of Stainless Steel 347/347H Pipes

Stainless Steel 347 Pipe / 347H Stainless Steel Pipe Specification

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

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

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

AISI 347H Schedule 40 Pipe Pressure ratings

Stainless Steel 347H Welded Tube Tolerance

Why Choose Stainless Steel 347/347H Pipes?

Fabricators select these pipes for seven specific properties:

• - Resists intergranular corrosion after welding and heat treatment
• - Maintains oxidation resistance at elevated service temperatures
• - Carries higher carbon content than 347 for added high-temperature strength
• - Delivers good creep resistance under sustained load
• - Holds stress-rupture strength at operating temperature
• - Withstands repeated heating and cooling without cracking
• - Welds with standard procedures using matched filler metal

Stainless Steel 347 vs 347H Pipes

The two grades share a base composition but diverge in carbon content and intended service range.

Applications of Stainless Steel 347H Pipes

347H pipes run in power generation plants, petrochemical units, refineries, and chemical processing lines. Heat exchangers, boiler components and high-temperature piping depend on the same carbide stability that protects exhaust systems and furnace components. Process piping in continuous high-temperature service rounds out the list.

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.

FAQs

Are 347H stainless steel pipes suitable for welded applications?

Yes. Niobium stabilisation resists carbide precipitation in the heat-affected zone, so 347H pipes weld well with matched filler metal.

What sizes and schedules are available for 347H stainless steel pipes?

347H pipes are available from 1/2 inch to 24 inch NPS, in schedules 5S through XXS, seamless or welded.

What tests are performed on 347H stainless steel pipes?

Mills run chemical analysis, tensile and hardness testing, intergranular corrosion testing per ASTM A262, hydrostatic testing and radiography on welds.

Can SS 347H pipes be supplied with MTCs?

Yes. Suppliers issue mill test certificates per EN 10204 3.1, covering composition, mechanical properties, and heat treatment records.

What industries use stainless steel 347H pipes?

Power generation, petrochemical, refining and chemical processing industries specify 347H pipes for high-temperature, high-pressure piping systems.

What is the difference between 347H and 321H stainless steel pipes?

347H uses niobium for carbide stabilisation, while 321H uses titanium. Niobium carbides are stable at higher temperatures than titanium carbides.