เหล็กท่อกลมดำ (Carbon Steel Tubes) มีชื่อที่นิยมใช้กันอย่างแพร่หลาย เช่น ท่อแป๊ปดำ ท่อดำ เหล็กกลมดำ เป็นต้น โดยเหล็กท่อกลมดำเป็นเหล็กโครงสร้างรูปพรรณ ขึ้นรูปเย็นที่มีลักษณะเป็นเหล็กยาวทรงกลมแบบกลวง มีความแข็งแรงทนทานแต่น้ำหนักเบา เหล็กกล้าคุณภาพสูงผ่านกระบวนการผลิตที่ทันสมัย ตามมาตรฐานมอก.107-2533แรงดันได้ดี สะดวกแก่การเชื่อมต่อ โดยเหล็กท่อกลมดำผลิตจาก
การใช้งาน
เหล็กท่อกลมดำ (Carbon Steel Tubes) นิยมนำไปใช้เป็นท่อสำหรับอาคารสูง งานโครงสร้างที่รับน้ำหนักไม่มากนัก เช่น สำหรับใช้เป็นท่อลำเลียง ท่อประปา ท่อชลประทาน ระบบน้ำภายในอาคาร รวมถึงนำไปประยุกต์ใช้ในงานทั่วไป เช่น ร้อยท่อสายไฟ รั้ว ประตู หรืองานตกแต่งอื่น ๆ ทุกขนาดสามารถนำไปชุบสังกะสีได้
วงนอก | ความหนา (in.) |
น้ำหนัก (kg./m.) |
น้ำหนัก (kg./piece) 6m. |
มาตรฐาน | |||
(mm.) | (in.) | JIS | TIS | ASTM | |||
G3444 107 A500 | |||||||
21.7 | 1/2 | 1.00 | 0.51 | 3.06 | |||
1.10 | 0.61 | 3.66 | |||||
1.40 | 0.70 | 4.20 | |||||
1.60 | 0.79 | 4.74 | |||||
1.80 | 0.88 | 5.28 | |||||
2.00 | 0.97 | 5.82 | √ | √ | |||
2.30 | 1.10 | 6.60 | |||||
2.50 | 1.18 | 7.08 | |||||
21.3 | 2.70 | 1.27 | 7.62 | √ | |||
2.80 | 1.31 | 7.86 | |||||
27.3 | 3/4 | 1.00 | 0.65 | 3.90 | |||
1.20 | 0.77 | 4.62 | |||||
1.40 | 0.89 | 5.34 | |||||
1.60 | 1.01 | 6.06 | |||||
1.80 | 1.13 | 6.78 | |||||
2.00 | 1.24 | 7.44 | √ | ||||
2.30 | 1.41 | 8.46 | √ | √ | |||
2.50 | 1.52 | 9.12 | |||||
2.80 | 1.68 | 10.08 | |||||
2.87 | 1.69 | 10.14 | √ | ||||
*34 | 1 | 1.20 | 0.97 | 5.82 | |||
1.40 | 1.13 | 6.78 | |||||
1.60 | 1.28 | 7.68 | |||||
1.80 | 1.43 | 8.58 | |||||
2.00 | 1.58 | 9.48 | |||||
2.30 | 1.80 | 10.80 | √ | √ | |||
2.50 | 1.94 | 11.64 | |||||
2.80 | 2.15 | 12.90 | |||||
3.00 | 2.29 | 13.74 | |||||
3.20 | 2.43 | 14.58 | |||||
3.50 | 2.63 | 15.78 | |||||
*33.4 | 2.64 | 2.00 | 12.00 | √ | |||
*33.4 | 3.38 | 2.50 | 15.00 | √ | |||
*33.4 | 4.55 | 3.24 | 19.44 | √ | |||
4.00 | 2.96 | 17.76 | |||||
42.7 | 1-1/4 | 1.40 | 1.43 | 5.58 | |||
1.60 | 1.62 | 9.72 | |||||
1.80 | 1.82 | 10.92 | |||||
2.00 | 2.01 | 12.06 | |||||
2.30 | 2.29 | 13.74 | √ | √ | |||
2.50 | 2.48 | 14.88 | √ | ||||
*42.2 | 2.79 | 2.71 | 16.26 | √ | |||
*42.2 | 3.56 | 3.39 | 20.34 | √ | |||
*42.2 | 4.85 | 4.47 | 26.82 | √ | |||
2.80 | 2.76 | 16.56 | |||||
3.00 | 2.94 | 17.64 | |||||
3.20 | 3.12 | 18.72 | |||||
48.6 | 1-1/2 | 1.40 | 1.63 | 9.78 | |||
1.60 | 1.85 | 11.10 | |||||
1.80 | 2.08 | 12.48 | |||||
2.00 | 2.30 | 13.80 | |||||
2.30 | 2.63 | 15.78 | √ | √ | |||
2.50 | 2.84 | 17.05 | √ | ||||
2.80 | 3.16 | 18.96 | √ | ||||
*48.3 | 2.90 | 3.25 | 19.50 | ||||
3.00 | 3.37 | 20.22 | √ | ||||
3.20 | 3.58 | 21.50 | √ | √ | |||
3.50 | 3.89 | 23.34 | |||||
*48.3 | 3.68 | 4.05 | 24.30 | √ | |||
4.00 | 4.40 | 26.40 | |||||
60.5 | 2 | 1.60 | 2.32 | 13.92 | |||
1.80 | 2.61 | 15.66 | |||||
2.00 | 2.89 | 17.34 | |||||
2.30 | 3.30 | 19.80 | √ | ||||
2.50 | 3.58 | 21.48 | |||||
2.80 | 3.98 | 23.88 | |||||
3.00 | 4.25 | 25.50 | |||||
3.20 | 4.52 | 27.12 | √ | √ | |||
3.50 | 4.92 | 29.52 | |||||
*60.3 | 3.07 | 4.33 | 25.98 | √ | |||
*60.3 | 3.91 | 5.44 | 32.64 | √ | |||
4.00 | 5.57 | 33.44 | √ | √ | |||
4.50 | 6.21 | 37.26 | |||||
*60.3 | 5.54 | 7.48 | 44.88 | √ | |||
76.3 | 2-1/2 | 1.80 | 3.31 | 19.86 | |||
2.00 | 3.66 | 21.96 | |||||
2.30 | 4.20 | 25.20 | |||||
2.50 | 4.55 | 27.30 | |||||
2.80 | 5.08 | 30.48 | √ | ||||
3.00 | 5.42 | 32.52 | |||||
3.20 | 5.77 | 34.62 | √ | √ | |||
3.50 | 6.28 | 37.70 | |||||
*73 | 3.96 | 6.74 | 40.44 | √ | |||
4.00 | 7.13 | 42.78 | √ | √ | |||
4.50 | 7.97 | 47.82 | |||||
*73 | 4.78 | 8.04 | 48.24 | √ | |||
5.00 | 8.79 | 52.75 | |||||
*73 | 5.16 | 8.63 | 51.78 | √ | |||
*73 | 7.01 | 11.40 | 68.50 | ||||
89.1 | 3 | 1.80 | 3.88 | 23..28 | |||
2.00 | 4.30 | 25.80 | |||||
2.30 | 4.92 | 29.52 | |||||
2.50 | 5.34 | 32.04 | |||||
2.80 | 5.96 | 35.76 | √ | ||||
3.00 | 6.37 | 38.22 | |||||
3.20 | 6.78 | 40.68 | √ | √ | |||
3.50 | 7.39 | 44.34 | |||||
*88.90 | 3.96 | 8.29 | 49.74 | √ | |||
4.00 | 8.39 | 50.34 | √ | ||||
4.50 | 9.39 | 56.34 | |||||
*88.90 | 4.78 | 9.92 | 59.52 | √ | |||
5.00 | 10.37 | 62.22 | |||||
*88.90 | 5.49 | 11.29 | 67.74 | √ | |||
101.6 | 3-1/2 | 2.50 | 6.11 | 36.66 | |||
2.80 | 6.82 | 40.92 | |||||
3.00 | 7.29 | 43.74 | |||||
3.20 | 7.77 | 46.62 | √ | √ | |||
3.50 | 8.47 | 50.82 | |||||
*101.60 | 3.96 | 9.53 | 57.18 | √ | |||
4.00 | 9.63 | 57.78 | √ | √ | |||
4.50 | 10.78 | 64.68 | |||||
*101.60 | 4.78 | 11.41 | 68.46 | √ | |||
5.00 | 11.91 | 71.46 | √ | ||||
*101.60 | 5.74 | 13.57 | 81.42 | √ | |||
114.3 | 4 | 2.50 | 6.89 | 41.34 | |||
2.80 | 7.70 | 46.20 | |||||
3.00 | 8.23 | 19.38 | |||||
3.20 | 8.77 | 52.62 | √ | √ | |||
3.50 | 9.56 | 57.36 | √ | ||||
*114.3 | 3.96 | 10.78 | 64.68 | √ | |||
4.00 | 10.88 | 65.28 | |||||
4.50 | 12.19 | 73.14 | √ | √ | |||
*114.3 | 4.78 | 12.91 | 77.46 | √ | |||
5.00 | 13.48 | 80.88 | |||||
5.60 | 15.00 | 90.00 | √ | ||||
*114.30 | 5.56 | 14.91 | 89.46 | √ | |||
6.00 | 16.03 | 96.18 | |||||
*114.30 | 6.02 | 16.07 | 96.42 | √ | |||
139.9 | 5 | 3.50 | 11.76 | 70.56 | |||
3.60 | 12.10 | 72.60 | √ | ||||
4.00 | 13.40 | 80.40 | √ | ||||
4.50 | 15.02 | 90.12 | √ | √ | |||
5.00 | 16.62 | 99.72 | |||||
6.00 | 19.80 | 118.80 | √ | √ | |||
*141.30 | 6.55 | 21.77 | 130.62 | √ | |||
*141.31 | 9.53 | 30.97 | 185.82 | √ | |||
168.3 | 6 | 3.50 | 14.22 | 85.32 | |||
4.00 | 16.21 | 97.26 | |||||
4.50 | 17.80 | 106.80 | √ | √ | |||
5.00 | 19.80 | 118.80 | √ | ||||
6.00 | 23.60 | 141.60 | √ | √ | |||
7.10 | 27.70 | 166.20 | √ | ||||
*163.30 | 7.11 | 28.26 | 169.56 | √ | |||
*168.30 | 10.97 | 42.56 | 255.36 | √ | |||
216 | 8 | 4.50 | 23.50 | 141.00 | |||
5.80 | 30.10 | 180.60 | √ | ||||
6.00 | 31.10 | 186.60 | √ | √ | |||
7.00 | 36.10 | 216.60 | √ | ||||
8.00 | 41.10 | 246.60 | √ | ||||
8.20 | 42.10 | 252.60 | √ | ||||
*219.10 | 8.18 | 42.55 | 255.30 | √ | |||
*219.10 | 12.70 | 64.64 | 387.84 | √ | |||
267.4 | 10 | 6.00 | 38.70 | 232.20 | √ | ||
6.60 | 42.40 | 254.40 | √ | ||||
7.00 | 45.00 | 270.00 | √ | ||||
8.00 | 51.20 | 307.20 | √ | ||||
9.00 | 57.30 | 343.80 | √ | ||||
9.30 | 59.20 | 355.20 | √ | ||||
*273 | 9.27 | 60.31 | 361.86 | √ | |||
*273 | 12.70 | 81.55 | 489.30 | √ | |||
318.5 | 12 | 6.00 | 46.20 | 277.20 | √ | ||
6.90 | 53.00 | 318.00 | √ | ||||
8.00 | 61.30 | 367.80 | √ | ||||
9.00 | 68.70 | 412.20 | √ | ||||
*323.8 | 9.53 | 73.88 | 443.28 | √ | |||
10.30 | 78.30 | 469.80 | √ | ||||
*323.8 | 12.70 | 97.46 | 584.76 | √ | |||
355.6 | 14 | 5.00 | 43.23 | 259.39 | |||
6.00 | 51.73 | 310.38 | |||||
6.40 | 55.10 | 330.60 | √ | ||||
7.90 | 67.70 | 406.20 | √ | ||||
9.00 | 76.93 | 461.58 | √ | ||||
9.50 | 81.10 | 486.60 | √ | ||||
*355.60 | 9.53 | 73.88 | 443.28 | √ | |||
12.00 | 102.00 | 612.00 | √ | ||||
12.70 | 107.00 | 642.00 | √ | ||||
*355.6 | 12.70 | 107.39 | 644.34 | √ | |||
16.00 | 134.00 | 804.00 | |||||
406.4 | 16 | 5.00 | 49.50 | 297.00 | |||
6.00 | 59.25 | 355.00 | |||||
7.90 | 77.60 | 465.60 | √ | ||||
9.00 | 88.20 | 529.20 | √ | ||||
9.50 | 93.00 | 558.00 | √ | ||||
*406.6 | 9.53 | 81.33 | 487.98 | √ | |||
12.00 | 117.00 | 700.32 | √ | ||||
12.70 | 123.00 | 738.00 | √ | ||||
*406.6 | 12.70 | 123.00 | 739.80 | √ | |||
457.2 | 6.00 | 66.76 | 400.56 | ||||
7.00 | 77.68 | 466.08 | |||||
9.00 | 99.48 | 596.88 | |||||
12.00 | 131.75 | 790.50 | |||||
16.00 | 174.09 | 1044.54 |