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GB/T 20409 20G Seamless Multi-Rifled Steel Tubes For High Pressure Boiler

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GB/T 20409 20G Seamless Multi-Rifled Steel Tubes For High Pressure Boiler

MOQ:	1 Tonnen
Preis:	800-1000 USD/Tons
Standardverpackung:	In Bündeln oder in Holzkisten.
Lieferfrist:	20-30 Tage nach Produkten
Zahlungsmethode:	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Lieferkapazität:	60000 Tonne/Tonnen pro Jahr

Detail-Informationen

Beschreibung des Produkts

Einzelheiten

Herkunftsort

Zhejiang/China

Markenname

TORICH

Zertifizierung

ISO9001, ISO14001, TS16949

Modellnummer

GB/T 20409

Material:

Kohlenstoffkesselstahl

Standard:

GB/T 20409

Materialreferenzstandard:

GB/T 5310

Grad:

Röhrentyp:

Nahtloses, mehrfach gezogenes Stahlrohr

Außendurchmesser:

Typischer Bereich von gezogenen Kesselrohren: 22–82,6 mm; Der Projektbereich kann durch Zeichnung be

Artikelbeschreibung Material Kohlenstoffkesselstahl Standard GB/T 20409 Materialreferenzstandard GB/:

Typischer Bereich: 4,0–16,0 mm

Länge:

1–12 m anpassbar; gängige Lieferlängen: 6 m, 9 m, 12 m

Beschreibung des Produkts

GB/T 20409 20G Seamless Multi-Rifled Steel Tubes For High Pressure Boiler 0

GB/T 20409 20G Seamless Multi-Rifled Steel Tubes for High-Pressure Boiler

GB/T 20409 20G seamless multi-rifled steel tubes are internally ribbed boiler tubes designed for high-pressure boiler water-wall service. Compared with plain bore boiler tubes, the internal rifling promotes spiral flow of the steam-water mixture, helping maintain a water film on the inner wall under high heat flux conditions. 20G is a carbon boiler steel grade commonly used under GB/T 5310 material requirements, offering a tensile strength range of 410–550 MPa, minimum yield strength of 245 MPa, and minimum elongation of 24%.

Specifications

Item	Description
Material	Carbon boiler steel
Standard	GB/T 20409
Material reference standard	GB/T 5310
Grade	20G
Tube type	Seamless multi-rifled steel tube
Outer diameter	Typical rifled boiler tube range: 22–82.6 mm; project range can be confirmed by drawing
Wall thickness	Typical range: 4.0–16.0 mm
Length	1–12 m customizable; common supply lengths: 6 m, 9 m, 12 m
Rib form	Internal multi-rifled profile; common options include 4, 6, 8, 12 or 14 ribs, subject to drawing
Tolerance range	As per GB/T 20409 / GB/T 5310 and purchase drawing; tighter tolerance available after technical review
Straightness	Controlled for boiler-panel fabrication and automatic welding alignment
Surface condition	Bare, oiled, anti-rust coated, shot-blasted or pickled as required
Heat treatment	Normalized or normalized and tempered according to grade, wall thickness and purchase specification
Inspection	Chemical analysis, tensile test, dimensional inspection, surface inspection, NDT, hydraulic test or equivalent test as specified

Main Characteristics

Characteristic	Technical Detail
Pressure-grade material	20G boiler steel: tensile strength 410–550 MPa, yield strength ≥245 MPa, elongation ≥24%
Internal rifling	Multi-rib inner profile creates spiral flow, improving water-wall wetting behavior compared with smooth bore tubes
Heat-transfer service	Designed for high-pressure boiler furnace water-wall tubes exposed to high heat flux
Seamless structure	No longitudinal weld seam, reducing weld-related weakness in high-pressure boiler operation
Impact requirement	For applicable sizes such as OD ≥76 mm and WT ≥14 mm, Charpy KV2 impact value is commonly specified at ≥40 J
Fabrication suitability	Suitable for bending, panel welding and membrane water-wall fabrication after material and dimensional confirmation

Our Advantages

Professional Concern	Our Solution
Will the rifled profile match the boiler designer’s drawing?	We confirm rib number, lead angle, inner profile, OD, wall thickness and minimum wall thickness before production. Inspection can include profile section checking and dimensional reports.
Can the tubes maintain stable quality for water-wall panel fabrication?	We control straightness, OD tolerance, wall thickness consistency and surface condition to support automatic welding, tube bending and membrane panel assembly.
Is 20G the right material for the boiler condition?	We match GB/T 20409 tube requirements with GB/T 5310 material performance. If temperature, pressure or creep conditions exceed 20G’s typical range, we can review alternatives such as 15CrMoG or 12Cr1MoVG.

Execution Standards

Standard System	Applicable Standard	Brief Description
GB	GB/T 20409	Seamless multi-rifled steel tubes for high-pressure boiler
GB	GB/T 5310	Seamless steel tubes and pipes for high-pressure boilers; material grades and mechanical requirements
ASTM / ASME	ASME SA-210 / ASTM A210	Seamless medium-carbon steel boiler and superheater tubes; often used for comparable boiler applications
ASTM / ASME	ASME SA-213 / ASTM A213	Seamless ferritic and austenitic alloy-steel boiler, superheater and heat-exchanger tubes
EN	EN 10216-2	Seamless steel tubes for pressure purposes; non-alloy and alloy steel tubes with elevated temperature properties
JIS	JIS G3461 / JIS G3462	Carbon steel and alloy steel boiler and heat exchanger tubes
GOST	GOST 8731 / GOST 8732	Seamless hot-formed steel pipe technical and dimensional standards

Application Field

Specific application: furnace water-wall tube panels for high-pressure utility boilers.

Chemical Composition

Grade	C %	Si %	Mn %	P max %	S max %	Cr %	Mo %	Cu max %	Ni max %	V %
20G	0.17–0.24	0.17–0.37	0.35–0.65	0.030	0.030	≤0.25	≤0.15	≤0.20	≤0.25	≤0.08
20MnG	0.17–0.24	0.17–0.37	0.70–1.00	0.030	0.030	≤0.25	≤0.15	≤0.20	≤0.25	≤0.08
25MnG	0.18–0.24	0.17–0.37	0.80–1.10	0.030	0.030	≤0.25	≤0.15	≤0.20	≤0.25	≤0.08
15CrMoG	0.12–0.18	0.17–0.37	0.40–0.70	0.025	0.015	0.80–1.10	0.40–0.55	≤0.20	≤0.30	≤0.08
12Cr1MoVG	0.08–0.15	0.17–0.37	0.40–0.70	0.030	0.030	0.90–1.20	0.25–0.35	≤0.20	≤0.30	0.15–0.30

Mechanical Properties

Grade	Tensile Strength MPa	Yield Strength MPa	Elongation %	Typical Heat Treatment
20G	410–550	≥245	≥24	Normalized
20MnG	≥415	≥240	≥22	Normalized
25MnG	≥485	≥275	≥20	Normalized
15CrMoG	440–640	≥295	≥21	Normalized + tempered
12Cr1MoVG	470–640	≥255	≥21	Normalized + tempered or quenched + tempered, depending on wall thickness

GB/T 20409 20G Seamless Multi-Rifled Steel Tubes For High Pressure Boiler 1

GB/T 20409 20G Seamless Multi-Rifled Steel Tubes For High Pressure Boiler 2

GB/T 20409 20G Seamless Multi-Rifled Steel Tubes For High Pressure Boiler 4

GB/T 20409 20G Seamless Multi-Rifled Steel Tubes For High Pressure Boiler 6

TORICH Group, an one-stop service provider of raw materials engaged in raw material production, R&D and

trade, has 30+ years of experience in the market, exported to 56 +countries, and won good reputation and

credibility among domestic and foreign customers.

The company's production plant covers an area of over 10,000 square meters, with an annual production

capacity of 50,000 tons of materials and a comprehensive trading and warehousing capacity of 100,000 tons, which can satisfy customers' personalized needs for raw materials in terms of diversity and timeliness.

The group holds shares in more than ten domestic production entities, whose main products include

seamless steel pipes ( carbon steel and stainless steel), welded pipes ( carbon steel and stainless steel), pipe fittings ( carbon steel and stainless steel), titanium (titanium tubes, titanium rods, titanium cakes, titanium plates, etc.), aluminum (aluminum tubes, aluminum rods, aluminum die casting, aluminum casting, CNC machining), and CNC deep processing of metal materials such as tubes, rods, and casting parts.

Over the past 30 years, the company has been gradually developing new technologies and materials to meet

the growing needs of customers and various diversified needs, exporting to more than 56 countries and still

increasing the number of exporting countries, aiming to help customers to solve the demand for raw materials, and to facilitate one-stop purchasing for customers.

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.

Schlagworte:

kaltbezogenes nahtloses Rohr,

nahtloses Rohr der Präzision,

Schwarzes Kohlenstoffstahl-Rohr

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GB/T 20409 20G Seamless Multi-Rifled Steel Tubes For High Pressure Boiler

MOQ:	1 Tonnen
Preis:	800-1000 USD/Tons
Standardverpackung:	In Bündeln oder in Holzkisten.
Lieferfrist:	20-30 Tage nach Produkten
Zahlungsmethode:	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Lieferkapazität:	60000 Tonne/Tonnen pro Jahr

Einzelheiten

Beschreibung des Produkts

Einzelheiten

Herkunftsort

Zhejiang/China

Markenname

TORICH

Zertifizierung

ISO9001, ISO14001, TS16949

Modellnummer

GB/T 20409

Material:

Kohlenstoffkesselstahl

Standard:

GB/T 20409

Materialreferenzstandard:

GB/T 5310

Grad:

20g

Röhrentyp:

Nahtloses, mehrfach gezogenes Stahlrohr

Außendurchmesser:

Typischer Bereich von gezogenen Kesselrohren: 22–82,6 mm; Der Projektbereich kann durch Zeichnung be

Artikelbeschreibung Material Kohlenstoffkesselstahl Standard GB/T 20409 Materialreferenzstandard GB/:

Typischer Bereich: 4,0–16,0 mm

Länge:

1–12 m anpassbar; gängige Lieferlängen: 6 m, 9 m, 12 m

Min Bestellmenge:

1 Tonnen

Preis:

800-1000 USD/Tons

Verpackung Informationen:

In Bündeln oder in Holzkisten.

Lieferzeit:

20-30 Tage nach Produkten

Zahlungsbedingungen:

L/C, D/A, D/P, T/T, Western Union, MoneyGram

Versorgungsmaterial-Fähigkeit:

60000 Tonne/Tonnen pro Jahr

Beschreibung des Produkts

GB/T 20409 20G Seamless Multi-Rifled Steel Tubes For High Pressure Boiler 0

GB/T 20409 20G Seamless Multi-Rifled Steel Tubes for High-Pressure Boiler

Specifications

Item	Description
Material	Carbon boiler steel
Standard	GB/T 20409
Material reference standard	GB/T 5310
Grade	20G
Tube type	Seamless multi-rifled steel tube
Outer diameter	Typical rifled boiler tube range: 22–82.6 mm; project range can be confirmed by drawing
Wall thickness	Typical range: 4.0–16.0 mm
Length	1–12 m customizable; common supply lengths: 6 m, 9 m, 12 m
Rib form	Internal multi-rifled profile; common options include 4, 6, 8, 12 or 14 ribs, subject to drawing
Tolerance range	As per GB/T 20409 / GB/T 5310 and purchase drawing; tighter tolerance available after technical review
Straightness	Controlled for boiler-panel fabrication and automatic welding alignment
Surface condition	Bare, oiled, anti-rust coated, shot-blasted or pickled as required
Heat treatment	Normalized or normalized and tempered according to grade, wall thickness and purchase specification
Inspection	Chemical analysis, tensile test, dimensional inspection, surface inspection, NDT, hydraulic test or equivalent test as specified

Main Characteristics

Characteristic	Technical Detail
Pressure-grade material	20G boiler steel: tensile strength 410–550 MPa, yield strength ≥245 MPa, elongation ≥24%
Internal rifling	Multi-rib inner profile creates spiral flow, improving water-wall wetting behavior compared with smooth bore tubes
Heat-transfer service	Designed for high-pressure boiler furnace water-wall tubes exposed to high heat flux
Seamless structure	No longitudinal weld seam, reducing weld-related weakness in high-pressure boiler operation
Impact requirement	For applicable sizes such as OD ≥76 mm and WT ≥14 mm, Charpy KV2 impact value is commonly specified at ≥40 J
Fabrication suitability	Suitable for bending, panel welding and membrane water-wall fabrication after material and dimensional confirmation

Our Advantages

Professional Concern	Our Solution
Will the rifled profile match the boiler designer’s drawing?	We confirm rib number, lead angle, inner profile, OD, wall thickness and minimum wall thickness before production. Inspection can include profile section checking and dimensional reports.
Can the tubes maintain stable quality for water-wall panel fabrication?	We control straightness, OD tolerance, wall thickness consistency and surface condition to support automatic welding, tube bending and membrane panel assembly.
Is 20G the right material for the boiler condition?	We match GB/T 20409 tube requirements with GB/T 5310 material performance. If temperature, pressure or creep conditions exceed 20G’s typical range, we can review alternatives such as 15CrMoG or 12Cr1MoVG.

Execution Standards

Standard System	Applicable Standard	Brief Description
GB	GB/T 20409	Seamless multi-rifled steel tubes for high-pressure boiler
GB	GB/T 5310	Seamless steel tubes and pipes for high-pressure boilers; material grades and mechanical requirements
ASTM / ASME	ASME SA-210 / ASTM A210	Seamless medium-carbon steel boiler and superheater tubes; often used for comparable boiler applications
ASTM / ASME	ASME SA-213 / ASTM A213	Seamless ferritic and austenitic alloy-steel boiler, superheater and heat-exchanger tubes
EN	EN 10216-2	Seamless steel tubes for pressure purposes; non-alloy and alloy steel tubes with elevated temperature properties
JIS	JIS G3461 / JIS G3462	Carbon steel and alloy steel boiler and heat exchanger tubes
GOST	GOST 8731 / GOST 8732	Seamless hot-formed steel pipe technical and dimensional standards

Application Field

Specific application: furnace water-wall tube panels for high-pressure utility boilers.

Chemical Composition

Grade	C %	Si %	Mn %	P max %	S max %	Cr %	Mo %	Cu max %	Ni max %	V %
20G	0.17–0.24	0.17–0.37	0.35–0.65	0.030	0.030	≤0.25	≤0.15	≤0.20	≤0.25	≤0.08
20MnG	0.17–0.24	0.17–0.37	0.70–1.00	0.030	0.030	≤0.25	≤0.15	≤0.20	≤0.25	≤0.08
25MnG	0.18–0.24	0.17–0.37	0.80–1.10	0.030	0.030	≤0.25	≤0.15	≤0.20	≤0.25	≤0.08
15CrMoG	0.12–0.18	0.17–0.37	0.40–0.70	0.025	0.015	0.80–1.10	0.40–0.55	≤0.20	≤0.30	≤0.08
12Cr1MoVG	0.08–0.15	0.17–0.37	0.40–0.70	0.030	0.030	0.90–1.20	0.25–0.35	≤0.20	≤0.30	0.15–0.30

Mechanical Properties

Grade	Tensile Strength MPa	Yield Strength MPa	Elongation %	Typical Heat Treatment
20G	410–550	≥245	≥24	Normalized
20MnG	≥415	≥240	≥22	Normalized
25MnG	≥485	≥275	≥20	Normalized
15CrMoG	440–640	≥295	≥21	Normalized + tempered
12Cr1MoVG	470–640	≥255	≥21	Normalized + tempered or quenched + tempered, depending on wall thickness

GB/T 20409 20G Seamless Multi-Rifled Steel Tubes For High Pressure Boiler 1

GB/T 20409 20G Seamless Multi-Rifled Steel Tubes For High Pressure Boiler 2

GB/T 20409 20G Seamless Multi-Rifled Steel Tubes For High Pressure Boiler 4

GB/T 20409 20G Seamless Multi-Rifled Steel Tubes For High Pressure Boiler 6

TORICH Group, an one-stop service provider of raw materials engaged in raw material production, R&D and

trade, has 30+ years of experience in the market, exported to 56 +countries, and won good reputation and

credibility among domestic and foreign customers.

The company's production plant covers an area of over 10,000 square meters, with an annual production

The group holds shares in more than ten domestic production entities, whose main products include

Over the past 30 years, the company has been gradually developing new technologies and materials to meet

the growing needs of customers and various diversified needs, exporting to more than 56 countries and still

increasing the number of exporting countries, aiming to help customers to solve the demand for raw materials, and to facilitate one-stop purchasing for customers.

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.

Schlagworte: