XINXIN PENGYUAN METAL MATERIAL CO., LTD.

Q345D Low Alloy Seamless Carbon Steel Pipe For Medium and Low Pressure Boiler Tube

Short Description:

Low and medium pressure boiler tubes are generally used for low pressure boilers (pressure less than or equal to 2.5MPa) and medium pressure boilers (pressure less than or equal to 3.9MPa), and can be used to make superheated steam tubes, boiling water tubes, water-cooled wall tubes, smoke tubes and arch brick tubes for low and medium pressure boilers, etc. They are generally made of high quality carbon structural steel, such as 10, 20 gauge, etc., which is hot rolled or cold rolled.


Product Detail

Product Tags

Product introduction

Low and medium pressure boiler tubes are made of ingots or solid billets that are perforated to form a burr tube, and then hot rolled, cold rolled or cold dialed. Seamless steel pipe has an important position in China's steel pipe industry. According to incomplete statistics, China's existing seamless pipe production enterprises about 240 more than, seamless steel pipe unit about 250 sets, the annual production capacity of about more than 4.5 million tons. From the caliber point of view, <φ76, accounting for 35%, <φ159-650, accounting for 25%. In terms of varieties, 1.9 million tons of general-purpose tubes, accounting for 54%; 760,000 tons of petroleum tubes, accounting for 5.7%; 150,000 tons of hydraulic pillars, precision tubes, accounting for 4.3%; stainless tubes, bearing tubes, automotive tubes a total of 50,000 tons, accounting for 1.4%.

Low and medium pressure boiler tube mechanical properties: tensile strength σb (MPa): ≥ 410 (42) yield strength σs (MPa): ≥ 245 (25) elongation δ5 (%): ≥ 25 section shrinkage ψ (%): ≥ 5, hardness: not heat treatment, ≤ 156HB, sample size: sample size 25mm heat treatment specifications and metallographic organization: heat treatment specifications: normalized, 910 ℃, Air cooling. Metallographic organization: ferrite + pearlite.

Medium and low pressure boiler tube execution standard: GB3087-1999 seamless steel tube for low and medium pressure boiler.

Medium and low pressure boiler tubes are hot rolled and cold drawn (rolled) seamless tubes of high quality carbon structural steel used for making superheated steam tubes, rolled water tubes and superheated steam tubes for locomotive boilers, large smoke tubes, small smoke tubes and arch brick tubes for various structures of low and medium pressure boilers. Mainly used for industrial boilers and living boilers to transport low and medium pressure fluid pipes. The representative material is 10 and 20 gauge steel.

Product Display

Q345D Low Alloy Seamless Carbo16
Q345D Low Alloy Seamless Carbo17

Mechanical properties

Standard Brand Tensile strength(MPa) Yield point(MPa)≥ Elongation(%) ≥ Impact power(J)≥
GB/T3087-2018 10# 333-475 196 24 -
20# 392-588 245/226 20 -  
GB/T5310-2018 20G 410-550 245 24 35
20MnG ≥415 240 22 35  
25MnG ≥485 275 20 35  
15MoG 450-600 270 22 35  
20MoG ≥415 220 22 35  
12CrMoG 410-560 205 21 35  
15CrMoG 440-640 235 21 35  
12Cr2MoG 450-600 280 20 35  
12Cr1MoVG 470-640 255 21 35  
12Cr2MoWVTib 540-735 345 18 35  

 

Specification Sheet

20g high pressure boiler tube specification table

Specification Specification Specification Specification
18*4 42*8 89*9 159*10
18*5 45*3 89*10 159*12
19*2 45*4 89*11 159*14
21*4 45*5 89*12 159*16
22*2.5 45*6 108*4.5 159*18
22*3 45*7 108*5 159*20
22*4 48*4 108*6 159*28
22*5 48*4.5 108*7 168*6
25*2.5 48*5 108*8 168*7
25*3 48*6 108*9 168*8
25*4 48*7 108*10 168*9.5
25*5 48.3*12.5 108*12 168*10
25*5.5 51*3 108*14 168*11
27*3.5 51*3.5 108*15 168*12
27*4 51*4 108*16 168*14
27*5 51*5 108*20 168*15
27*5.5 51*6 114*5 168*16
28*2.5 57*4 114*6 168*18
28*3 57*5 114*7 168*20
28*3.5 57*5.5 114*8 168*22
28*4 57*6 114*8.5 168*25
30*2.5 60*4 114*9 168*28
32*2.5 60*4 114*10 180*10
32*3 60*5 114*11 194*10
32*3.5 60*6 114*12 194*12
32*4 60*7 114*13 194*14
32*4.5 60*8 114*14 194*16
32*5 60*9 114*16 194*18
34*3 60*10 114*18 194*20
34*4 76*4.5 133*5 194*26
34*4.5 76*5 133*6 219*6.5
34*5 76*6 133*7 219*7
34*6.5 76*7 133*8 219*8
38*3 76*8 133*10 219*9
38*3.5 76*9 133*12 219*10
38*4 76*10 133*13 219*12
38*4.5 89*4 133*14 219*13
38*5 89*4.5 133*16 219*14
219*16 273*36 356*28 426*12
219*18 273*40 356*36 426*13
219*20 273*42 377*9 426*14
219*22 273*45 377*10 426*17

 

Parcel picture

Q345D Low Alloy Seamless Carbo18

FAQ

1.Why you choose us ?

Our company has been in Alibaba.com for 12 years. We control the quality of the products very strictly, there are special people for the quality.

If you got lower price from other supplier ,we will pay back twice to customers about the higher price.

2.How long is your delivery time?

According to the quantity.Generally within 2-7 days if in stock.And 15-20 days if not in stock.

3.What is your payment terms?

 A: By T/T 30% in advance ,and 70% before delivery.

 B:100% L/C at sight.

 C:By T/T 30% in advance,and 70% L/C at sight.

4.Do you provide samples ? Is it free?

Yes, we offer the sample for free but do not pay for the cost of freight.

5.What if the customer is not satisfied?

If there is a problem with the product,we take full responsibility. 

If there is a problem in the transportation process,we will help you to solve it.


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