Common use of SEGMENT INFORMATION Clause in Contracts

SEGMENT INFORMATION. The Group are organised into business units based on its products and services. During the current period, the Group have not changed the organisation of their reportable segments. The following tables present revenue and profit information regarding the Group operating segments in the consolidated financial statements for the three-month periods ended March 31, 2022 and 2021, respectively. In Thousand Baht For the three-month periods ended March 31, 2022 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 143,701 - 547,442 145,644 836,787 - 836,787 Revenue from subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (6,106) - (4,685) (6,116) (16,907) 358 (16,549) Administrative expenses (16,320) - (27,235) (16,855) (60,410) 1,038 (59,372) Segment profit (loss) (10,816) - (9,794) (5,572) (26,182) 5,223 (20,959) Other income 3,597 Interest revenue 320 Financial cost (9,799) Share of profit (loss) from investments in joint venture (4,898) Profit (loss) before income tax expenses (31,739) Income tax income (expense) (1,706) Profit (loss) the period (33,445) In Thousand Baht For the three-month periods ended March 31, 2021 (Restated) Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 526,665 (57,978) 682,986 6,801 1,158,474 - 1,158,474 Revenue from subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (12,858) 1,503 (5,511) (1,524) (18,390) 372 (18,018) Administrative expenses (31,371) 3,669 (20,941) (651) (49,294) 35 (49,259) Segment profit (loss) (42,117) (69,816) (8,189) 2,430 (117,692) 6,203 (111,489) Other income 8,157 Interest revenue - Financial cost (7,454) Share of profit (loss) from investments in joint venture (1,309) Profit (loss) before income tax expenses (112,095) Income tax income (expense) 1,601 Profit (loss) the period (110,494) Transfer prices between business segments are as set out in Note 4.

SEGMENT INFORMATION. The Group Company and its subsidiaries are organised into business units based on its products and services. During the current periodperiods, the Group Company and its subsidiaries have not changed the organisation of their reportable segments. The following tables present revenue and profit information regarding the Group Company and its subsidiaries’ operating segments in the consolidated financial statements for the three-month and six- month periods ended March 31June 30, 2022 2020 and 20212019, respectively. In Thousand Baht For the three-month periods period ended March 31June 30, 2022 2020 Pipeline system Engineeringsystem Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 137,859 75,699 498,754 4,904 717,216 - 717,216 Revenue from subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (15,063) (7,443) (2,049) (1,190) (25,745) 360 (25,385) Administrative expenses (36,554) (17,662) (21,602) (736) (76,554) 1,712 (74,842) Segment profit (loss) (79,970) (14,391) 26 1,705 (92,630) 5,039 (87,591) Other income 13,346 Interest revenue 569 Interest expenses (4,355) Share of loss from investments in associate - Share of loss from investments in joint venture (1,104) Profit (loss) before income tax expenses (79,135) Income tax income (expense) 562 Profit (loss) for the period (78,573) In Thousand Baht For the three-month period ended June 30, 2019 Pipeline system Engineeringsystem Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 137,781 78,267 436,867 3,272 656,187 - 656,187 Revenue from subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (15,609) (9,677) (2,313) (1,067) (28,666) 430 (28,236) Administrative expenses (37,948) (23,529) (15,497) (404) (77,378) 882 (76,496) Segment profit (loss) (40,210) (44,808) 4,606 655 (79,757) 4,044 (75,713) Other income 8,573 Interest revenue 274 Interest expenses (7,467) Share of profit from investments in joint venture 1,042 Profit (loss) before income tax expenses (73,291) Income tax income (expense) (456) Profit (loss) for the period (73,747) In Thousand Baht For the six-month period ended June 30, 2020 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 143,701 476,074 210,086 975,366 11,253 1,672,779 - 547,442 145,644 836,787 - 836,787 1,672,779 Revenue from subsidiary subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (6,106) - (4,68533,159) (6,11614,633) (16,9074,871) 358 (16,5492,432) (55,095) 729 (54,366) Administrative expenses (16,320) - (27,23571,392) (16,85531,504) (60,41032,162) 1,038 (59,3721,352) (136,410) 2,686 (133,724) Segment profit (loss) (10,816) - (9,79478,378) (5,57218,341) 12,453 3,725 (26,18280,541) 5,223 10,025 (20,95970,516) Other income 3,597 20,922 Interest revenue 320 Financial cost 796 Interest expenses (9,79910,065) Share of profit (loss) loss from investments in associate - Share of loss from investments in joint venture (4,8982,959) Profit (loss) before income tax expenses (31,73961,822) Income tax income (expense) (1,7065,557) Profit (loss) for the period (33,44567,379) In Thousand Baht For the threesix-month periods period ended March 31June 30, 2021 (Restated) 2019 Pipeline system Engineering system Engineeringsystem Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 526,665 (57,978) 682,986 6,801 1,158,474 300,885 227,443 914,122 6,138 1,448,588 - 1,158,474 1,448,588 Revenue from subsidiary subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (12,858) 1,503 (5,51128,984) (1,52421,910) (18,3904,639) 372 (18,0182,110) (57,643) 736 (56,907) Administrative expenses (31,371) 3,669 (20,94170,441) (65153,247) (49,29423,683) 35 (49,259794) (148,165) 2,334 (145,831) Segment profit (loss) (42,11726,631) (69,816123,020) 18,596 948 (8,189130,107) 2,430 7,525 (117,692) 6,203 (111,489122,582) Other income 8,157 17,889 Interest revenue - Financial cost 288 Interest expenses (7,45416,217) Share of profit (loss) from investments in joint venture (1,309) 2,122 Profit (loss) before income tax expenses (112,095118,500) Income tax income (expense) 1,601 (3,494) Profit (loss) for the period (110,494121,994) Transfer prices between business segments are as set out in Note 45.

SEGMENT INFORMATION. The Group Company and its subsidiaries are organised into business units based on its products and services. During the current period, the Group Company and its subsidiaries have not changed the organisation of their reportable segments. The following tables present revenue and profit information regarding the Group Company and its subsidiaries’ operating segments in the consolidated financial statements for the three-month periods ended March 31, 2022 2020 and 20212019, respectively. In Thousand Baht For the three-month periods ended March 31, 2022 2020 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 143,701 338,215 134,387 476,612 6,349 955,563 - 547,442 145,644 836,787 - 836,787 955,563 Revenue from subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (6,106) - (4,68518,096) (6,1167,190) (16,9072,822) 358 (16,5491,242) (29,350) 369 (28,981) Administrative expenses (16,320) - (27,23534,838) (16,85513,842) (60,41010,560) 1,038 (59,372616) (59,856) 974 (58,882) Segment profit (loss) 1,592 (10,8163,950) - (9,794) (5,572) (26,182) 5,223 (20,959) 12,427 2,020 12,089 4,986 17,075 Other income 3,597 7,576 Interest revenue 320 Financial cost 227 Interest expenses (9,7995,710) Share of profit from investments in associate (loss1,596) Share of loss from investments in joint venture (4,898259) Profit (loss) Loss before income tax expenses (31,739) 17,313 Income tax income expenses (expense6,119) (1,706) Profit (loss) Loss the period (33,445) 11,194 In Thousand Baht For the three-month periods ended March 31, 2021 (Restated) 2019 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 526,665 (57,978) 682,986 6,801 1,158,474 163,104 149,176 477,255 2,866 792,401 - 1,158,474 792,401 Revenue from subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (12,858) 1,503 (5,51113,375) (1,52412,233) (18,3902,326) 372 (18,0181,043) (28,977) 306 (28,671) Administrative expenses (31,371) 3,669 (20,94132,493) (65129,718) (49,2948,186) 35 (49,259390) (70,787) 1,452 (69,335) Segment profit (loss) 13,579 (42,11778,212) 13,990 293 (69,81650,350) 3,481 (8,189) 2,430 (117,692) 6,203 (111,48946,869) Other income 8,157 9,316 Interest revenue - Financial cost 14 Interest expenses (7,4548,750) Share of profit (loss) loss from investments in joint venture (1,309) Profit (loss) - Share of profit from investments in associate 1,080 Loss before income tax expenses (112,09545,209) Income tax income expenses (expense3,038) 1,601 Profit (loss) Loss the period (110,49448,247) Transfer prices between business segments are as set out in Note 45.

SEGMENT INFORMATION. The Group Company and its subsidiaries are organised into business units based on its products and services. During the current period, the Group Company and its subsidiaries have not changed the organisation of their reportable segments. The following tables present revenue and profit information regarding the Group Company and its subsidiaries’ operating segments in the consolidated financial statements for the three-month and nine- month periods ended March 31September 30, 2022 2019 and 20212018, respectively. In Thousand Baht For the three-month periods ended March 31September 30, 2022 2019 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 143,701 275,128 65,747 613,852 3,390 958,117 - 547,442 145,644 836,787 - 836,787 958,117 Revenue from subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (6,106) - (4,68521,434) (6,1163,753) (16,9072,276) 358 (16,5491,114) (28,577) 314 (28,263) Administrative expenses (16,320) - (27,23540,863) (16,8553,406) (60,41014,401) 1,038 (59,372425) (59,095) 124 (58,971) Segment profit (loss) (10,81624,396) - (9,794) (5,572) (26,182) 5,223 (20,959) 8,661 20,571 601 5,437 2,304 7,741 Other income 3,597 19,345 Interest revenue 320 Financial cost 2 Interest expenses (9,7998,571) Share of profit (loss) loss from investments in joint venture - Share of profit from investments in associate (4,89895) Profit (loss) Loss before income tax expenses (31,739) 18,422 Income tax income expenses (expense7,115) (1,706) Profit (loss) Loss the period (33,445) 11,307 In Thousand Baht For the three-month periods ended March 31September 30, 2021 (Restated) 2018 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 526,665 (57,978) 682,986 6,801 1,158,474 261,922 105,118 277,096 1,718 645,854 - 1,158,474 645,854 Revenue from subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (12,858) 1,503 (5,51117,489) (1,5247,270) (18,3902,642) 372 (18,0181,066) (28,467) 375 (28,092) Administrative expenses (31,371) 3,669 (20,94143,503) (65117,923) (49,2948,266) 35 (49,259405) (70,097) 960 (69,137) Segment profit (loss) 22,660 (4,539) 32,877 (784) 50,214 3,584 53,798 Other income 24,712 Interest revenue - Interest expenses (5,821) Share of loss from investments in associate (11,673) Share of loss from investments in joint venture 540 Profit before income tax expenses 61,556 Income tax expenses (18,904) Profit for the period 42,652 In Thousand Baht For the nine-month periods ended September 30, 2019 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 576,013 293,190 1,527,974 9,528 2,406,705 - 2,406,705 Revenue from subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (50,418) (25,663) (6,915) (3,224) (86,220) 1,050 (85,170) Administrative expenses (111,304) (56,653) (38,084) (1,219) (207,260) 2,458 (204,802) Segment profit (loss) (42,11751,027) (69,816114,359) 39,167 1,549 (8,189124,670) 2,430 9,829 (117,692) 6,203 (111,489114,841) Other income 8,157 37,234 Interest revenue - Financial cost 290 Interest expenses (7,45424,788) Share of profit (loss) loss from investments in joint venture (1,309) Profit (loss) - Share of profit from investments in associate 2,027 Loss before income tax expenses (112,095100,078) Income tax income expenses (expense10,609) 1,601 Profit Loss the period (110,687) In Thousand Baht For the nine-month periods ended September 30, 2018 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 800,428 270,905 494,448 3,811 1,569,592 - 1,569,592 Revenue from subsidiary - - - 370 370 (370) - Revenue from associate - - 20,381 - 20,381 - 20,381 Depreciation (53,650) (18,125) (8,490) (2,338) (82,603) 1,116 (81,487) Administrative expenses (137,734) (46,729) (27,445) (5,051) (216,959) 2,202 (214,757) Segment profit (loss) 46,316 (38,286) 35,729 (5,529) 38,230 10,778 49,008 Other income 33,623 Interest revenue 654 Interest expenses (14,251) Share of loss from investments in associate (36,644) Share of loss from investments in joint venture 665 Profit before income tax expenses 33,055 Income tax expenses (27,805) Profit for the period (110,494) 5,250 Transfer prices between business segments are as set out in Note 4.

SEGMENT INFORMATION. The Group Company and its subsidiaries are organised into business units based on its products and services. During the current period, the Group Company and its subsidiaries have not changed the organisation of their reportable segments. The following tables present revenue and profit information regarding the Group Company and its subsidiaries’ operating segments in the consolidated financial statements for the three-month periods ended March 31, 2022 2021 and 20212020, respectively. In Thousand Baht For the three-month periods ended March 31, 2022 2021 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 143,701 620,141 (44,744) 609,625 6,801 1,191,823 - 547,442 145,644 836,787 - 836,787 1,191,823 Revenue from subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (6,10614,072) - 1,015 (4,685) (6,116) (16,907) 358 (16,549) Administrative expenses (16,320) - (27,235) (16,855) (60,410) 1,038 (59,372) Segment profit (loss) (10,816) - (9,794) (5,572) (26,182) 5,223 (20,959) Other income 3,597 Interest revenue 320 Financial cost (9,799) Share of profit (loss) from investments in joint venture (4,898) Profit (loss) before income tax expenses (31,739) Income tax income (expense) (1,706) Profit (loss) the period (33,445) In Thousand Baht For the three-month periods ended March 31, 2021 (Restated) Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 526,665 (57,978) 682,986 6,801 1,158,474 - 1,158,474 Revenue from subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (12,858) 1,503 (5,5113,809) (1,524) (18,390) 372 (18,018) Administrative expenses (31,37134,321) 3,669 2,476 (20,94116,798) (651) (49,294) 35 (49,259) Segment profit (loss) (42,11747,673) (69,81669,876) (8,1892,317) 2,430 (117,692117,436) 6,203 (111,489111,233) Other income 8,157 Interest revenue - Financial cost (7,454) Share of profit (loss) from investments in joint venture (1,309) Profit (loss) before income tax expenses (112,095111,839) Income tax income (expense) 1,601 1,892 Profit (loss) the period (110,494109,947) MARCH 31, 2021 In Thousand Baht For the three-month periods ended March 31, 2020 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 338,215 134,387 476,612 6,349 955,563 - 955,563 Revenue from subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (18,096) (7,190) (2,822) (1,242) (29,350) 369 (28,981) Administrative expenses (34,838) (13,842) (10,560) (616) (59,856) 974 (58,882) Segment profit (loss) 1,592 (3,950) 12,427 2,020 12,089 4,986 17,075 Other income 7,576 Interest revenue 227 Financial cost (5,710) Share of profit (loss) from investments in joint venture (1,855) Profit (loss) before income tax expenses 17,313 Income tax income (expense) (6,119) Profit (loss) the period 11,194 Transfer prices between business segments are as set out in Note 4.

SEGMENT INFORMATION. The Group are organised into business units based on its products and services. During the current periodperiods, the Group have not changed the organisation of their reportable segments. The following tables present revenue and profit information regarding the Group Groups’ operating segments in the consolidated financial statements for the three-month and nine-month periods ended March 31September 30, 2022 2021 and 20212020, respectively. In Thousand Baht For the three-month periods period ended March 31September 30, 2022 2021 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 143,701 - 547,442 145,644 836,787 - 836,787 320,209 4,707 463,676 18,787 807,379 (2,627) 804,752 Revenue from subsidiary subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (6,10613,298) 44 (4,707) (225) (18,186) - (4,685) (6,116) (16,907) 358 (16,54918,186) Administrative expenses (16,32029,442) - 21 (27,23517,263) (16,8552,838) (60,41049,522) 1,038 1,710 (59,37247,812) Segment profit (loss) 1,404 444 13,315 (10,81656) - (9,794) (5,572) (26,182) 5,223 (20,959) 15,107 3,713 18,820 Other income 3,597 4,800 Interest revenue 320 123 Financial cost (9,7999,521) Share of profit (loss) from investments in joint venture Venture (4,898364) Profit (loss) before income tax expenses (31,739) 13,858 Income tax income (expense) (1,7064,598) Profit (loss) for the period (33,445) 9,260 In Thousand Baht Baht‌‌ For the three-month periods period ended March 31September 30, 2021 (Restated) 2020 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 526,665 (57,978) 682,986 6,801 1,158,474 82,352 30,908 479,530 6,313 599,103 - 1,158,474 599,103 Revenue from subsidiary subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (12,858) 1,503 (5,51112,331) (1,5244,999) (18,3902,400) 372 (18,0181,170) (20,900) 148 (20,752) Administrative expenses (31,371) 3,669 (20,94125,558) (65110,336) (49,29417,271) 35 (49,259648) (53,813) 1,839 (51,974) Segment profit (loss) (42,117114,043) (69,81610,785) (8,189302,919) 2,430 (117,6921,166) 6,203 (111,489428,913) 5,626 (423,287) Other income 8,157 15,577 Interest revenue - 51 Financial cost (7,4547,468) Share of profit (loss) from investments in joint venture 615 Profit (loss) before income tax expenses (414,512) Income tax income (expense) 32,000 Profit (loss) for the period (382,512) In Thousand Baht For the nine-month period ended September 30, 2021 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 1,492,668 (34,377) 1,734,394 31,224 3,223,909 (2,627) 3,221,282 Revenue from subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (38,730) 892 (13,802) (3,247) (54,887) 749 (54,138) Administrative expenses (92,802) 2,133 (54,401) (4,184) (149,254) 1,657 (147,597) Segment profit (loss) (27,489) (69,508) 24,244 3,342 (69,411) 13,599 (55,812) Other income 30,555 Interest revenue 155 Financial cost (25,765) Share of profit (loss) from investments in joint venture (1,309914) Profit (loss) before income tax expenses (112,09551,781) Income tax income (expense) 1,601 (9,187) Profit (loss) for the period (110,49460,968) In Thousand Baht‌‌ For the nine-month period ended September 30, 2020 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 558,426 240,994 1,454,896 17,566 2,271,882 - 2,271,882 Revenue from subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (45,490) (19,632) (7,271) (3,602) (75,995) 877 (75,118) Administrative expenses (96,950) (41,840) (49,433) (2,000) (190,223) 4,525 (185,698) Segment profit (loss) (192,421) (29,126) (290,466) 2,559 (509,454) 15,651 (493,803) Other income 36,499 Interest revenue 847 Financial cost (17,533) Share of profit (loss) from investments in joint venture (2,344) Profit (loss) before income tax expenses (476,334) Income tax income (expense) 26,443 Profit (loss) for the period (449,891) Transfer prices between business segments are as set out in Note 4.