Stainless Steel 347 and 347H Welded Pipes

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Stainless Steel 347 and 347H Welded Pipes Manufacturer, Supplier and Exporter in Muscat, OMAN

Laila Pipes and Tubes has established itself as a reliable manufacturer and supplier of top-notch Stainless Steel 347 and 347H Welded Pipes in Muscat, Oman. They specialize in precision-engineered welded pipes that meet international standards, making them perfect for high-temperature and corrosive environments. With state-of-the-art manufacturing facilities, strict quality control measures, and a talented technical team, Laila Pipes and Tubes caters to various industries, including chemical processing, petrochemical, oil and gas, power generation, and aerospace. Their commitment to consistent quality, timely delivery, and a customer-centric approach has helped them build a solid reputation in both regional and global markets.

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The Stainless Steel 347 and 347H Welded Pipes are made from titanium-stabilized austenitic stainless steel, which includes chromium, nickel, and titanium. The 347H variant, with its higher carbon content, offers improved high-temperature strength and creep resistance. Both grades excel in resisting intergranular corrosion, pitting, and oxidation in harsh environments. On the mechanical side, these pipes boast high tensile and yield strength, toughness, and fatigue resistance, all while maintaining good weldability and machinability. Their welded design ensures uniform wall thickness, dimensional stability, and reliable performance even under high-pressure and high-temperature conditions.

Stainless Steel 347 and 347H Welded Pipes Welded Pipe Specification

Specifications : ASTM A312 / ASME SA312

Outside Diameter : 6.00 mm OD up to 914.4 mm OD, Sizes up to 24″ NB available Ex-stock, OD Size available Ex-stock

Thickness : 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS

Size : 1/2″ NB – 24″ NB

Type : Welded

Form: Round Pipes, Square Pipes, Rectangular Pipes.

Length : Single Random, Double Random & Required Length

End : Plain End, Beveled End, Treaded

Equivalent Grades for Stainless Steel 347 and 347H Welded Pipes

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

Stainless Steel 347 and 347H Welded Pipes Chemical Composition

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

SS 347 and 347H Welded Pipes Mechanical Properties

Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
8.0 g/cm3	1454 °C (2650 °F)	Psi – 75000, MPa – 515	Psi – 30000, MPa – 205	35 %

If You Are Looking To Buy High Quality

We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.

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Why Choose 347 and 347H Stainless Steel Welded Pipes from Laila Pipes and Tubes?

Stainless Steel 347 and 347H welded pipes are austenitic stainless steels that are stabilized with niobium (columbium) to prevent intergranular corrosion. These pipes typically contain around 17–19% chromium and 9–13% nickel, while 347H features a higher carbon content to enhance creep strength at elevated temperatures. They are known for their excellent corrosion resistance, high tensile strength, good creep resistance, and dimensional stability during welding and extended thermal exposure. The welded design ensures uniformity, making them suitable for a variety of industrial piping systems.

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Largest 347 and 347H Stainless Steel Welded Pipes Supplier in Muscat, OMAN

Laila Pipes and Tubes, a leading manufacturer and supplier of Stainless Steel 347 and 347H Welded Pipes in Muscat, OMAN, offers a comprehensive range of high-quality pipes and tubing suitable for various industrial applications. Our extensive inventory and commitment to exceptional service make us a trusted choice for regional products.

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347 and 347H Stainless Steel Welded Pipe Sizes

NB Sizes	Sch 5	Sch 10	Sch 40	Sch 80	Sch 160
1/8″	✓	✓	✓	✓
1/4″	✓	✓	✓	✓
3/8″	✓	✓	✓	✓
1/2″	✓	✓	✓	✓	✓
3/4″	✓	✓	✓	✓	✓
1″	✓	✓	✓	✓	✓
1 1/4″	✓	✓	✓	✓	✓
1 1/2″	✓	✓	✓	✓	✓
2″	✓	✓	✓	✓	✓
2 1/2″	✓	✓	✓	✓	✓
3″	✓	✓	✓	✓	✓
4″	✓	✓	✓	✓	✓
5″	✓	✓	✓	✓
6″	✓	✓	✓	✓

Types of 347 and 347H Stainless Steel Welded Pipes

Are Custom Sizes Available for 347 and 347H Stainless Steel Welded Pipes?

These welded pipes are extensively used in high-temperature and corrosive applications. You’ll often find them in boilers, heat exchangers, superheaters, chemical processing equipment, and petrochemical plants. The power generation and oil and gas sectors depend on them for high-pressure, high-temperature piping systems. Moreover, aerospace and marine applications also make use of these pipes, where resistance to intergranular corrosion, long-lasting durability, and thermal stability are essential.

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You’ll find Stainless Steel 347 and 347H Welded Pipes commonly used in boilers, heat exchangers, pressure vessels, and high-temperature piping systems. They’re also essential in petrochemical plants, oil & gas refineries, and power generation facilities where corrosion resistance and durability at elevated temperatures are crucial. Plus, they’re perfect for furnace components, industrial ovens, and high-temperature process piping that require long-lasting strength and reliability. With their blend of mechanical strength, corrosion resistance, and high-temperature performance, these pipes are truly a reliable choice for demanding applications.