ASTM A106 Steel Pipe

What is a ASTM A106 steel pipe?

ASTM A106 steel pipe (also covered in ASME specifications as S/A 106 pipe) is the standard specification for seamless carbon steel pipe for high-temperature service. Most common uses are in refineries and plants when gasses or fluids are transported at high temperatures and pressures.

Yaang Pipe Industry is a world leader in the supply of A106 / SA 106 pipe and stocks a full range of grades B/C in a size rage of NPS 1/8″ to NPS 48″, with nominal (average) wall thickness as given in ANSI B36.10. Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this specification*.

Pipe ordered under this specification shall be suitable for bending, for flanging, for welding, and for similar forming operations. A full range of A106 stock is available in Schedules 10 through 160, STD, XS, XXS. Unscheduled wall thicknesses available up to 4 inches.

Yaang Pipe Industry stocks a full range of A106 seamless carbon steel pipe.

Quantity	Feet, centimeters, or number of lengths
Name of material	Seamless
Grade	Grade A, Grade B, or Grade C
Manufacture	Hot-finished or cold-drawn
Size	NPS or Outside Diameter and Schedule Number of Average Wall Thickness
Special outside diameter tolerance pipe
Inside diameter tolerance pipe, over 10 in ID
Length	Specific or random
Supplementary requirements
Test Report Required
Specification designation
Hydrostatic test
Special requirements

 Grades B/C

 Sizes

NPS 1/8″ to NPS 48”
Wall thickness: Schedules 10 through 160, STD, XS, XXS.

*Commonly requested unscheduled walls up to 4” and certified minimum wall items

Chemical Properties % of ASTM A106 Steel Pipe

	C, max.	Mn	P, max	S, max	Si, min	Cr, max	Cu, max	Mo, max	Ni, max	V, max
Grade A *	0.25	0.27 – 0.93	0.035	0.035	0.10	0.40	0.40	0.15	0.40	0.08
Grade B	0.30	0.29 – 1.06	0.035	0.035	0.10	0.40	0.40	0.15	0.40	0.08
Grade C	0.35	0.29 – 1.06	0.035	0.035	0.10	0.40	0.40	0.15	0.40	0.08

*For each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.35%.

(Note: This is summarized information from ASME Specification A106. Please refer to the specific Standard or Specification or contact us for more details.)

Permissible Variations in Wall Thickness

The minimum wall thickness at any point shall not be more than 12.5% under the nominal wall thickness specified.

Permissible Variations in Weights per Foot

Weight of any length shall not vary more than 10% over and 3.5% under that specified. NOTE — NPS 4 and smaller — weighed in lots. Larger sizes shall be weighed separately by length.

Permissible Variations in Outside Diameter

Outside Diameter at any point shall not vary from standard specified more than:

NPS [DN Designator]	Over		Under
	in.	mm	in.	mm
1/8 to 1-1/2 [6 to 40], incl	1/64 (0.015)	0.4	1/64 (0.015)	0.4
Over 1-1/2 to 4 [40 to 100], incl	1/32 (0.031)	0.8	1/32 (0.031)	0.8
Over 4 to 8 [100 to 200], incl	1/16 (0.062)	1.6	1/32 (0.031)	0.8
Over 8 to 18 [200 to 450], incl	3/32 (0.093)	2.4	1/32 (0.031)	0.8
Over 18 to 26 [450 to 650], incl	1/8 (0.125)	3.2	1/32 (0.031)	0.8
Over 26 to 34 [650 to 859], incl	5/32 (0.156)	4.0	1/32 (0.031)	0.8
Over 34 to 48 [850 to 1200], incl	3/16 (0.187)	4.8	1/32 (0.031)	0.8

Tensile Requirements

	Seamless
	Grade A	Grade B	Grade C
Tensile Strength, min., psi	48,000	60,000	70,000
Yield Strength, min., psi	30,000	35,000	40,000

Number of Tests Required

	NPS		On One Length from Each Lot of
Tensile	5 and smaller		400 or less
	6 and larger		200 or less
Bending	2 and smaller		400 or less
Flattening	2 through 5		400 or less
	6 and over		200 or less

Hydrostatic Testing

Inspection test pressures produce a stress in the steel pipe wall equal to 60% of specified minimum yield strength (SMYS) at room temperature. Maximum Pressures are not to exceed 2500 psi for NPS3 and must stay under 2800 psi for the larger sizes. Pressure is maintained for not less than 5 seconds.

Mechanical Tests Specified

Tensile Test — NPS 8 and larger — either transverse or longitudinal acceptable Smaller than NPS 8 — weighed in lots. Larger sizes — by length. Flattening Test — NPS 2-1/2 and larger. Bending Test (Cold) — NPS 2 and under.

	Degree of Bend		Diameter of Mandrel
For Normal A106 Uses	90		12 x nom dia. of pipe
For Close Coiling	180		8 x nom dia. of pipe

Lengths

Lengths required shall be specified on order. No “jointers” permitted unless otherwise specified. If no definite lengths required, following practice applies: Single Random — 17′ ~ 24′ lengths Double Random — 36′ ~ 44′ lengths

Description

1.standards: ASTM A106 (ASME SA106) 
2.products mainly used: apply to bending, curling and similar forming process. 
3.the main products of steel / steel grade: Gr.A; Gr.B; Gr.C. 
4.Specifications: diameter: 10.3 to 114.3 mm thickness: 0.8 to 12 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe. 
5.Chemical composition and mechanical properties 
6.JIS Number and Corrensponding Foreign Standards

Required Markings on Each Length

(On Tags attached to each Bundle in case of Bundled Pipe) Rolled, Stamped, or Stenciled (Mfrs. Option) Manufacturer’s name or brand. Length of pipe. A106 A, A 106 B, A 106 C. ANSI schedule number. Hydrostatic test pressures and/or NDE; Weight per foot (NPS 4 and larger) or NH if neither is specified. Additional “S” if tested supplementary requirements.

*ASTM A 106 grade B Seamless Pressure Pipe

B) Unless otherwise specified by the purchaser, for each reduction of 0.01 % below the specified carbon maximum, an increase of 0.06 % manganese above the specified maximum will be permitted up to a maximum of 1.65 %.

*ASME SA 106 grade B Seamless Pressure Pipe

B) For each reduction of 0.01 % below the specified carbon maximum, an increase of 0.06 % manganese above the specified maximum will be permitted up to a maximum of 1.35 %.

Characteristics of seamless pipe

Seamless tube process performance test: flattening test, tensile test, impact test, flaring test, hardness test, metallographic test, bending test, nondestructive testing (including eddy current X-ray and ultrasonic testing). 

Chemical analysis of seamless pipe: the chemical composition of the material for chemical analysis, chemical composition to meet the standard requirements. 

Seamless pipe pressure and hydrostatic test is for pressure tube by into the hydrostatic test, which do not maintain the prescribed pressure value not less than 5 seconds, not to disclose, the regular supply hydraulic pressure test is 2.45MPa pressure The pressure test is P = 0.5MPAa. 

The corrosion test: industrial corrosion-resistant steel pipe according to standard regulations or agreement between the corrosion of steel pipe corrosion resistance test, no intergranular corrosion. 

Characteristics of seamless pipe

• the outer diameter is smaller.
• High precision can do small quantities of raw.
• cold drawn steel pipe with high precision and good surface quality.
• steel pipe cross area is more complex.
• steel pipe superior performance, relatively dense metal.

Source: China A106 Steel Pipe Manufacturer – Yaang Pipe Industry (www.steeljrv.com)

(Yaang Pipe Industry is a leading manufacturer and supplier of nickel alloy and stainless steel products, including Super Duplex Stainless Steel Flanges, Stainless Steel Flanges, Stainless Steel Pipe Fittings, Stainless Steel Pipe. Yaang products are widely used in Shipbuilding, Nuclear power, Marine engineering, Petroleum, Chemical, Mining, Sewage treatment, Natural gas and Pressure vessels and other industries.)

If you want to have more information about the article or you want to share your opinion with us, contact us at sales@steeljrv.com
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References:

• https://www.yaang.com