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GB 28883 Composite Seamless Steel Tubes For Pressure

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GB 28883 Composite Seamless Steel Tubes For Pressure

MOQ:	1 Tons
Price:	800-1000 USD/Tons
Standard Packaging:	In bundles or in wooden boxes.
Delivery Period:	20-30days upon products
Payment Method:	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Capacity:	60000 Ton/Tons per Year

Details Information

Product Description

Detail Information

Place of Origin

Zhejiang/China

Brand Name

TORICH

Certification

ISO9001, ISO14001, TS16949

Model Number

GB 28883

Material:

Composite Seamless Steel Tube: Carbon/alloy Steel Base Layer + Stainless Steel, Duplex Stainless Steel, Or Corrosion-resistant Alloy Cladding Layer

Standard:

GB 28883 / GB/T 28883, Composite Seamless Steel Tubes For Pressure

Common Base Grades:

10, 20G, 20MnG, 16Mn, 15MoG, 12CrMoG, 15CrMoG, 12Cr1MoVG

Outer Diameter:

Φ10–426 Mm

Wall Thickness:

2–60 Mm

Length:

Standard 4,000–12,000 Mm; Customized 1–12 M Available By Agreement

Heat Treatment:

Supplied In Heat-treated Condition; Heat Treatment Process Recorded In The Quality Certificate

Pressure Test:

Hydrostatic Test On Each Tube; Maximum Test Pressure 20 MPa; Holding Time ≥10 S; No Leakage Permitted

Product Description

GB 28883 Composite Seamless Steel Tubes For Pressure 0

GB 28883 Composite Seamless Steel Tubes for Pressure

GB 28883 composite seamless steel tubes are pressure-bearing bimetallic seamless tubes designed for boilers, pressure vessels, and pressure piping where the tube must combine mechanical strength from the base metal with corrosion resistance from the cladding metal. The standard defines the tube as a composite structure made from different inner and outer steel grades, with ordering based on “outer grade + inner grade” and wall thickness shown as “base layer + cladding layer.” The standard scope covers dimensions, tolerances, technical requirements, testing, inspection, marking, packaging, and quality certificates for pressure service.

Specifications

Item	Specification
Material	Composite seamless steel tube: carbon/alloy steel base layer + stainless steel, duplex stainless steel, or corrosion-resistant alloy cladding layer
Standard	GB 28883 / GB/T 28883, Composite Seamless Steel Tubes for Pressure
Common Base Grades	10, 20G, 20MnG, 16Mn, 15MoG, 12CrMoG, 15CrMoG, 12Cr1MoVG
Common Cladding Grades	07Cr19Ni10, 022Cr19Ni10, 022Cr17Ni12Mo2, 022Cr22Ni5Mo3N, NS1402, NS3102
Outer Diameter	10–426 mm
Wall Thickness	2–60 mm
Base Layer Thickness	50%–90% of nominal wall thickness
Cladding Layer Thickness	10%–50% of nominal wall thickness
Length	Standard 4,000–12,000 mm; customized 1–12 m available by agreement
Fixed Length Tolerance	+20 / 0 mm
OD Tolerance, Hot Rolled / Extruded	≤80 mm: ±0.40 mm; >80–325 mm: ±0.75%D or ±1%D depending on wall thickness; >325 mm: ±1%D
OD Tolerance, Cold Rolled / Drawn	≤80 mm: ±0.30 mm; >80–219 mm: ±0.75%D; >219–325 mm: ±0.75%D or ±1%D; >325 mm: ±1%D
Wall Thickness Tolerance	Hot rolled: +12.5% / -10%; cold drawn: S≤3 mm ±0.30 mm, S>3 mm ±10%
Straightness	S≤15 mm: ≤1.5 mm/m; 15<S≤30 mm: ≤2.0 mm/m; S>30 mm: ≤3.0 mm/m
Full-Length Straightness	For nominal diameter ≥127 mm: ≤0.1% of tube length
Surface Condition	Pickled or polished; free from cracks, folds, scabs, laps, rolling folds, and delamination
Heat Treatment	Supplied in heat-treated condition; heat treatment process recorded in the quality certificate
Pressure Test	Hydrostatic test on each tube; maximum test pressure 20 MPa; holding time ≥10 s; no leakage permitted

Key Features

Defined composite wall structure: base metal thickness is controlled at 50%–90% of total wall thickness, while cladding thickness is controlled at 10%–50%, allowing the tube to balance pressure strength and corrosion resistance.
Verified bonding performance: metallurgical fusion composite tubes require bonding shear strength of ≥210 MPa, and metallurgically bonded explosion-formed composite tubes require ≥140 MPa. Buyers may specify ≥260 MPa for metallurgical fusion composite tubes.
Pressure integrity control: each tube is hydrostatically tested using P = 2SR/D, with allowable stress based on 80% of the base metal yield strength, maximum pressure 20 MPa, and holding time not less than 10 seconds.
NDT requirement for fusion composite tubes: metallurgical fusion composite seamless tubes require full-length ultrasonic testing according to GB/T 5777-2008, acceptance level L2.
Surface defect limit: surface defect removal depth must not exceed 10% of wall thickness, and the remaining wall thickness must not be less than the minimum permitted value. Straight-line surface defects must not exceed 4% of wall thickness, with a maximum depth of 0.2 mm.

Our Advantages

Buyer Concern	Our Solution
Bonding failure or delamination during bending, flattening, or pressure service	We control the base/cladding interface and support shear strength testing. For metallurgical fusion composite tubes, bonding shear strength can be supplied to ≥210 MPa, or ≥260 MPa when specified by the purchaser. Flattening inspection can verify no visible delamination or cracking.
Pressure safety and leakage risk	Each tube can be supplied with hydrostatic testing according to GB 28883, with maximum test pressure up to 20 MPa, holding time ≥10 s, and no leakage permitted. Eddy-current testing may be used as an agreed alternative for metallurgical fusion composite tubes.
Corrosion resistance of the cladding layer	Stainless, duplex stainless, or corrosion-resistant alloy cladding grades are available. The cladding layer can be tested for intergranular corrosion according to GB/T 4334-2008 Method E, helping confirm suitability for corrosive fluid contact.

Execution Standards

Standard System	Related Standard	Brief Description
GB	GB 28883 / GB/T 28883	Composite seamless steel tubes for pressure; main applicable standard
GB	GB/T 17395	Dimensions, shape, weight, and allowable deviations for seamless steel tubes
GB	GB/T 5777	Ultrasonic testing method for seamless steel tubes
GB	GB/T 4334	Intergranular corrosion test for stainless steel cladding
ASTM	ASTM A213 / A789 / A790, by technical agreement	Used for reference when buyers require stainless or duplex pressure tube comparison; not a direct one-to-one composite tube equivalent
EN	EN 10216 series, by technical agreement	Seamless steel tubes for pressure purposes; used as pressure tube reference for European projects
JIS	JIS G3458 / JIS G3463, by agreement	Alloy steel and stainless steel tubes for pressure or heat exchanger service reference
GOST	GOST 9941 / related pressure tube standards, by agreement	Seamless corrosion-resistant steel tube reference for CIS-market documentation

Application Field

Application: waste heat boiler evaporator tube for sulfur-containing chemical process gas.

This application needs a pressure-bearing base layer for boiler service and a corrosion-resistant cladding layer on the fluid-contact side to reduce corrosion risk from aggressive process media.

Chemical Composition

The following table lists five common base metal grades under GB 28883. Values are mass fraction, %.

Grade	C	Si	Mn	Cr	Mo	V	P Max	S Max
20G	0.17–0.23	0.17–0.37	0.35–0.65	—	—	—	0.025	0.015
20MnG	0.17–0.23	0.17–0.37	0.70–1.00	—	—	—	0.025	0.015
16Mn	0.12–0.20	0.20–0.60	1.20–1.60	—	—	—	0.025	0.015
15MoG	0.12–0.20	0.17–0.37	0.40–0.80	—	0.25–0.35	—	0.025	0.015
15CrMoG	0.12–0.18	0.17–0.37	0.40–0.70	0.80–1.10	0.40–0.55	—	0.025	0.015

Mechanical Properties

Grade	Tensile Strength Rm, MPa	Yield Strength ReL / Rp, MPa Min	Elongation A Longitudinal, % Min	Elongation A Transverse, % Min	Impact Energy KV2 Longitudinal, J Min	Impact Energy KV2 Transverse, J Min
20G	410–550	245	24	22	40	27
20MnG	415–560	240	22	20	40	27
16Mn	490–670	320	21	19	40	27
15MoG	450–600	270	22	20	40	27
15CrMoG	440–640	295	21	19	40	27

GB 28883 Composite Seamless Steel Tubes For Pressure 1

GB 28883 Composite Seamless Steel Tubes For Pressure 2

GB 28883 Composite Seamless Steel Tubes For Pressure 4

GB 28883 Composite Seamless Steel Tubes For Pressure 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.

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GB 28883 Composite Seamless Steel Tubes For Pressure

MOQ:	1 Tons
Price:	800-1000 USD/Tons
Standard Packaging:	In bundles or in wooden boxes.
Delivery Period:	20-30days upon products
Payment Method:	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Capacity:	60000 Ton/Tons per Year

Detail Information

Product Description

Detail Information

Place of Origin

Zhejiang/China

Brand Name

TORICH

Certification

ISO9001, ISO14001, TS16949

Model Number

GB 28883

Material:

Composite Seamless Steel Tube: Carbon/alloy Steel Base Layer + Stainless Steel, Duplex Stainless Steel, Or Corrosion-resistant Alloy Cladding Layer

Standard:

GB 28883 / GB/T 28883, Composite Seamless Steel Tubes For Pressure

Common Base Grades:

10, 20G, 20MnG, 16Mn, 15MoG, 12CrMoG, 15CrMoG, 12Cr1MoVG

Outer Diameter:

Φ10–426 Mm

Wall Thickness:

2–60 Mm

Length:

Standard 4,000–12,000 Mm; Customized 1–12 M Available By Agreement

Heat Treatment:

Supplied In Heat-treated Condition; Heat Treatment Process Recorded In The Quality Certificate

Pressure Test:

Hydrostatic Test On Each Tube; Maximum Test Pressure 20 MPa; Holding Time ≥10 S; No Leakage Permitted

Minimum Order Quantity:

1 Tons

Price:

800-1000 USD/Tons

Packaging Details:

In bundles or in wooden boxes.

Delivery Time:

20-30days upon products

Payment Terms:

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

Supply Ability:

60000 Ton/Tons per Year

Product Description

GB 28883 Composite Seamless Steel Tubes For Pressure 0

GB 28883 Composite Seamless Steel Tubes for Pressure

Specifications

Item	Specification
Material	Composite seamless steel tube: carbon/alloy steel base layer + stainless steel, duplex stainless steel, or corrosion-resistant alloy cladding layer
Standard	GB 28883 / GB/T 28883, Composite Seamless Steel Tubes for Pressure
Common Base Grades	10, 20G, 20MnG, 16Mn, 15MoG, 12CrMoG, 15CrMoG, 12Cr1MoVG
Common Cladding Grades	07Cr19Ni10, 022Cr19Ni10, 022Cr17Ni12Mo2, 022Cr22Ni5Mo3N, NS1402, NS3102
Outer Diameter	10–426 mm
Wall Thickness	2–60 mm
Base Layer Thickness	50%–90% of nominal wall thickness
Cladding Layer Thickness	10%–50% of nominal wall thickness
Length	Standard 4,000–12,000 mm; customized 1–12 m available by agreement
Fixed Length Tolerance	+20 / 0 mm
OD Tolerance, Hot Rolled / Extruded	≤80 mm: ±0.40 mm; >80–325 mm: ±0.75%D or ±1%D depending on wall thickness; >325 mm: ±1%D
OD Tolerance, Cold Rolled / Drawn	≤80 mm: ±0.30 mm; >80–219 mm: ±0.75%D; >219–325 mm: ±0.75%D or ±1%D; >325 mm: ±1%D
Wall Thickness Tolerance	Hot rolled: +12.5% / -10%; cold drawn: S≤3 mm ±0.30 mm, S>3 mm ±10%
Straightness	S≤15 mm: ≤1.5 mm/m; 15<S≤30 mm: ≤2.0 mm/m; S>30 mm: ≤3.0 mm/m
Full-Length Straightness	For nominal diameter ≥127 mm: ≤0.1% of tube length
Surface Condition	Pickled or polished; free from cracks, folds, scabs, laps, rolling folds, and delamination
Heat Treatment	Supplied in heat-treated condition; heat treatment process recorded in the quality certificate
Pressure Test	Hydrostatic test on each tube; maximum test pressure 20 MPa; holding time ≥10 s; no leakage permitted

Key Features

Defined composite wall structure: base metal thickness is controlled at 50%–90% of total wall thickness, while cladding thickness is controlled at 10%–50%, allowing the tube to balance pressure strength and corrosion resistance.
Verified bonding performance: metallurgical fusion composite tubes require bonding shear strength of ≥210 MPa, and metallurgically bonded explosion-formed composite tubes require ≥140 MPa. Buyers may specify ≥260 MPa for metallurgical fusion composite tubes.
Pressure integrity control: each tube is hydrostatically tested using P = 2SR/D, with allowable stress based on 80% of the base metal yield strength, maximum pressure 20 MPa, and holding time not less than 10 seconds.
NDT requirement for fusion composite tubes: metallurgical fusion composite seamless tubes require full-length ultrasonic testing according to GB/T 5777-2008, acceptance level L2.
Surface defect limit: surface defect removal depth must not exceed 10% of wall thickness, and the remaining wall thickness must not be less than the minimum permitted value. Straight-line surface defects must not exceed 4% of wall thickness, with a maximum depth of 0.2 mm.

Our Advantages

Buyer Concern	Our Solution
Bonding failure or delamination during bending, flattening, or pressure service	We control the base/cladding interface and support shear strength testing. For metallurgical fusion composite tubes, bonding shear strength can be supplied to ≥210 MPa, or ≥260 MPa when specified by the purchaser. Flattening inspection can verify no visible delamination or cracking.
Pressure safety and leakage risk	Each tube can be supplied with hydrostatic testing according to GB 28883, with maximum test pressure up to 20 MPa, holding time ≥10 s, and no leakage permitted. Eddy-current testing may be used as an agreed alternative for metallurgical fusion composite tubes.
Corrosion resistance of the cladding layer	Stainless, duplex stainless, or corrosion-resistant alloy cladding grades are available. The cladding layer can be tested for intergranular corrosion according to GB/T 4334-2008 Method E, helping confirm suitability for corrosive fluid contact.

Execution Standards

Standard System	Related Standard	Brief Description
GB	GB 28883 / GB/T 28883	Composite seamless steel tubes for pressure; main applicable standard
GB	GB/T 17395	Dimensions, shape, weight, and allowable deviations for seamless steel tubes
GB	GB/T 5777	Ultrasonic testing method for seamless steel tubes
GB	GB/T 4334	Intergranular corrosion test for stainless steel cladding
ASTM	ASTM A213 / A789 / A790, by technical agreement	Used for reference when buyers require stainless or duplex pressure tube comparison; not a direct one-to-one composite tube equivalent
EN	EN 10216 series, by technical agreement	Seamless steel tubes for pressure purposes; used as pressure tube reference for European projects
JIS	JIS G3458 / JIS G3463, by agreement	Alloy steel and stainless steel tubes for pressure or heat exchanger service reference
GOST	GOST 9941 / related pressure tube standards, by agreement	Seamless corrosion-resistant steel tube reference for CIS-market documentation

Application Field

Application: waste heat boiler evaporator tube for sulfur-containing chemical process gas.

This application needs a pressure-bearing base layer for boiler service and a corrosion-resistant cladding layer on the fluid-contact side to reduce corrosion risk from aggressive process media.

Chemical Composition

The following table lists five common base metal grades under GB 28883. Values are mass fraction, %.

Grade	C	Si	Mn	Cr	Mo	V	P Max	S Max
20G	0.17–0.23	0.17–0.37	0.35–0.65	—	—	—	0.025	0.015
20MnG	0.17–0.23	0.17–0.37	0.70–1.00	—	—	—	0.025	0.015
16Mn	0.12–0.20	0.20–0.60	1.20–1.60	—	—	—	0.025	0.015
15MoG	0.12–0.20	0.17–0.37	0.40–0.80	—	0.25–0.35	—	0.025	0.015
15CrMoG	0.12–0.18	0.17–0.37	0.40–0.70	0.80–1.10	0.40–0.55	—	0.025	0.015

Mechanical Properties

Grade	Tensile Strength Rm, MPa	Yield Strength ReL / Rp, MPa Min	Elongation A Longitudinal, % Min	Elongation A Transverse, % Min	Impact Energy KV2 Longitudinal, J Min	Impact Energy KV2 Transverse, J Min
20G	410–550	245	24	22	40	27
20MnG	415–560	240	22	20	40	27
16Mn	490–670	320	21	19	40	27
15MoG	450–600	270	22	20	40	27
15CrMoG	440–640	295	21	19	40	27

GB 28883 Composite Seamless Steel Tubes For Pressure 1

GB 28883 Composite Seamless Steel Tubes For Pressure 2

GB 28883 Composite Seamless Steel Tubes For Pressure 4

GB 28883 Composite Seamless Steel Tubes For Pressure 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.

Tags: