Common use of SEGMENT INFORMATION Clause in Contracts

SEGMENT INFORMATION. The Company and its subsidiaries are organised into business units based on its products and services. During the current periods, the Company and its subsidiaries have not changed the organisation of their reportable segments. The following tables present revenue and profit information regarding the Company and its subsidiaries’ operating segments in the consolidated financial statements for the three-month and six- month periods ended June 30, 2020 and 2019, respectively. In Thousand Baht For the three-month period ended June 30, 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 476,074 210,086 975,366 11,253 1,672,779 - 1,672,779 Revenue from subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (33,159) (14,633) (4,871) (2,432) (55,095) 729 (54,366) Administrative expenses (71,392) (31,504) (32,162) (1,352) (136,410) 2,686 (133,724) Segment profit (loss) (78,378) (18,341) 12,453 3,725 (80,541) 10,025 (70,516) Other income 20,922 Interest revenue 796 Interest expenses (10,065) Share of loss from investments in associate - Share of loss from investments in joint venture (2,959) Profit (loss) before income tax expenses (61,822) Income tax income (expense) (5,557) Profit (loss) for the period (67,379) In Thousand Baht For the six-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 300,885 227,443 914,122 6,138 1,448,588 - 1,448,588 Revenue from subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (28,984) (21,910) (4,639) (2,110) (57,643) 736 (56,907) Administrative expenses (70,441) (53,247) (23,683) (794) (148,165) 2,334 (145,831) Segment profit (loss) (26,631) (123,020) 18,596 948 (130,107) 7,525 (122,582) Other income 17,889 Interest revenue 288 Interest expenses (16,217) Share of profit from investments in joint venture 2,122 Profit (loss) before income tax expenses (118,500) Income tax income (expense) (3,494) Profit (loss) for the period (121,994) Transfer prices between business segments are as set out in Note 5.

SEGMENT INFORMATION. The Company and its subsidiaries are organised into business units based on its products and services. During the current periodsperiod, the Company and its subsidiaries have not changed the organisation of their reportable segments. The following tables present revenue and profit information regarding the Company and its subsidiaries’ operating segments in the consolidated financial statements for the three-month and six- month periods ended June 30March 31, 2020 and 2019, respectively. In Thousand Baht For the three-month period periods ended June 30, 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 30March 31, 2020 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 476,074 210,086 975,366 11,253 1,672,779 338,215 134,387 476,612 6,349 955,563 - 1,672,779 955,563 Revenue from subsidiaries subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (33,15918,096) (14,6337,190) (4,8712,822) (2,4321,242) (55,09529,350) 729 369 (54,36628,981) Administrative expenses (71,39234,838) (31,50413,842) (32,16210,560) (1,352616) (136,41059,856) 2,686 974 (133,72458,882) Segment profit (loss) 1,592 (78,3783,950) (18,341) 12,453 3,725 (80,541) 10,025 (70,516) 12,427 2,020 12,089 4,986 17,075 Other income 20,922 7,576 Interest revenue 796 227 Interest expenses (10,0655,710) Share of loss profit from investments in associate - (1,596) Share of loss from investments in joint venture (2,959259) Profit (loss) Loss before income tax expenses (61,822) 17,313 Income tax income expenses (expense6,119) (5,557) Profit (loss) for Loss the period (67,379) 11,194 In Thousand Baht For the sixthree-month period periods ended June 30March 31, 2019 Pipeline system Engineeringsystem Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 300,885 227,443 914,122 6,138 1,448,588 163,104 149,176 477,255 2,866 792,401 - 1,448,588 792,401 Revenue from subsidiaries subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (28,98413,375) (21,91012,233) (4,6392,326) (2,1101,043) (57,64328,977) 736 306 (56,90728,671) Administrative expenses (70,44132,493) (53,24729,718) (23,6838,186) (794390) (148,16570,787) 2,334 1,452 (145,83169,335) Segment profit (loss) 13,579 (26,63178,212) 13,990 293 (123,02050,350) 18,596 948 3,481 (130,107) 7,525 (122,58246,869) Other income 17,889 9,316 Interest revenue 288 14 Interest expenses (16,2178,750) Share of loss from investments in joint venture - Share of profit from investments in joint venture 2,122 Profit (loss) associate 1,080 Loss before income tax expenses (118,50045,209) Income tax income expenses (expense3,038) (3,494) Profit (loss) for Loss the period (121,99448,247) Transfer prices between business segments are as set out in Note 5.

SEGMENT INFORMATION. The Company and its subsidiaries Group are organised into business units based on its products and services. During the current periodsperiod, the Company and its subsidiaries Group have not changed the organisation of their reportable segments. The following tables present revenue and profit information regarding the Company and its subsidiaries’ Group operating segments in the consolidated financial statements for the three-month and six- month periods ended June 30March 31, 2020 2022 and 20192021, respectively. In Thousand Baht For the three-month period periods ended June 30March 31, 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 2022 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 476,074 210,086 975,366 11,253 1,672,779 143,701 - 1,672,779 547,442 145,644 836,787 - 836,787 Revenue from subsidiaries subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (33,1596,106) - (4,685) (14,6336,116) (4,87116,907) 358 (2,432) (55,095) 729 (54,36616,549) Administrative expenses (71,39216,320) - (27,235) (31,50416,855) (32,16260,410) 1,038 (1,352) (136,410) 2,686 (133,72459,372) Segment profit (loss) (78,37810,816) - (9,794) (18,3415,572) 12,453 3,725 (80,54126,182) 10,025 5,223 (70,51620,959) Other income 20,922 3,597 Interest revenue 796 Interest expenses 320 Financial cost (10,0659,799) Share of loss from investments in associate - Share of loss profit (loss) from investments in joint venture (2,9594,898) Profit (loss) before income tax expenses (61,82231,739) Income tax income (expense) (5,5571,706) Profit (loss) for the period (67,37933,445) In Thousand Baht For the sixthree-month period periods ended June 30March 31, 2019 2021 (Restated) Pipeline system Engineeringsystem Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 300,885 227,443 914,122 6,138 1,448,588 526,665 (57,978) 682,986 6,801 1,158,474 - 1,448,588 1,158,474 Revenue from subsidiaries subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (28,98412,858) 1,503 (5,511) (21,9101,524) (4,63918,390) 372 (2,110) (57,643) 736 (56,90718,018) Administrative expenses (70,44131,371) 3,669 (20,941) (53,247651) (23,68349,294) 35 (794) (148,165) 2,334 (145,83149,259) Segment profit (loss) (26,63142,117) (123,02069,816) 18,596 948 (130,1078,189) 7,525 2,430 (122,582117,692) 6,203 (111,489) Other income 17,889 8,157 Interest revenue 288 Interest expenses - Financial cost (16,2177,454) Share of profit (loss) from investments in joint venture 2,122 (1,309) Profit (loss) before income tax expenses (118,500112,095) Income tax income (expense) (3,494) 1,601 Profit (loss) for the period (121,994110,494) Transfer prices between business segments are as set out in Note 54.

SEGMENT INFORMATION. The Company and its subsidiaries Group are organised into business units based on its products and services. During the current periods, the Company and its subsidiaries Group have not changed the organisation of their reportable segments. The following tables present revenue and profit information regarding the Company and its subsidiariesGroups’ operating segments in the consolidated financial statements for the three-month and six- six-month periods ended June 30, 2020 2021 and 20192020, respectively. In Thousand Baht For the three-month period ended June 30, 2021 Pipeline system Engineeringsystem Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 552,318 5,660 661,093 5,636 1,224,707 - 1,224,707 Revenue from subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (11,360) (167) (5,286) (1,498) (18,311) 377 (17,934) Administrative expenses (29,039) (364) (20,340) (695) (50,438) (88) (50,526) Segment profit (loss) 18,780 (76) 13,246 968 32,918 3,683 36,601 Other income 17,598 Interest revenue 32 Financial cost (8,790) Share of profit (loss) from investments in joint Venture 759 Profit (loss) before income tax expenses 46,200 Income tax income (expense) (6,481) Profit (loss) for the period 39,719 In Thousand Baht For the three-month period ended June 30, 2020 Pipeline system Engineeringsystem Engineering system 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 Financial cost (4,355) Share of loss from investments in associate - Share of loss profit (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 threesix-month period ended June 30, 2019 2021 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 1,172,459 (39,084) 1,270,718 12,437 2,416,530 - 656,187 2,416,530 Revenue from subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (15,60925,432) 848 (9,095) (9,6773,022) (2,31336,701) 749 (1,067) (28,666) 430 (28,23635,952) Administrative expenses (37,94863,360) 2,112 (37,138) (23,5291,346) (15,49799,732) (40453) (77,378) 882 (76,49699,785) Segment profit (loss) (40,21028,893) (44,80869,952) 4,606 655 10,929 3,398 (79,75784,518) 4,044 9,886 (75,71374,632) Other income 8,573 25,755 Interest revenue 274 Interest expenses 32 Financial cost (7,46716,244) Share of profit (loss) from investments in joint venture 1,042 (550) Profit (loss) before income tax expenses (73,29165,639) Income tax income (expense) (4564,589) Profit (loss) for the period (73,74770,228) 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 476,074 210,086 975,366 11,253 1,672,779 - 1,672,779 Revenue from subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (33,159) (14,633) (4,871) (2,432) (55,095) 729 (54,366) Administrative expenses (71,392) (31,504) (32,162) (1,352) (136,410) 2,686 (133,724) Segment profit (loss) (78,378) (18,341) 12,453 3,725 (80,541) 10,025 (70,516) Other income 20,922 Interest revenue 796 Interest expenses Financial cost (10,065) Share of loss from investments in associate - Share of loss profit (loss) from investments in joint venture (2,959) Profit (loss) before income tax expenses (61,822) Income tax income (expense) (5,557) Profit (loss) for the period (67,379) In Thousand Baht For the six-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 300,885 227,443 914,122 6,138 1,448,588 - 1,448,588 Revenue from subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (28,984) (21,910) (4,639) (2,110) (57,643) 736 (56,907) Administrative expenses (70,441) (53,247) (23,683) (794) (148,165) 2,334 (145,831) Segment profit (loss) (26,631) (123,020) 18,596 948 (130,107) 7,525 (122,582) Other income 17,889 Interest revenue 288 Interest expenses (16,217) Share of profit from investments in joint venture 2,122 Profit (loss) before income tax expenses (118,500) Income tax income (expense) (3,494) Profit (loss) for the period (121,994) Transfer prices between business segments are as set out in Note 54.

SEGMENT INFORMATION. The Company and its subsidiaries are organised into business units based on its products and services. During the current periodsperiod, the Company and its subsidiaries have not changed the organisation of their reportable segments. The following tables present revenue and profit information regarding the Company and its subsidiaries’ operating segments in the consolidated financial statements for the three-month and six- month periods ended June 30March 31, 2020 2021 and 20192020, respectively. In Thousand Baht For the three-month period periods ended June 30March 31, 2020 2021 Pipeline system Engineeringsystem Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 137,859 75,699 498,754 4,904 717,216 620,141 (44,744) 609,625 6,801 1,191,823 - 717,216 1,191,823 Revenue from subsidiaries subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (15,06314,072) 1,015 (3,809) (7,4431,524) (2,04918,390) 372 (1,190) (25,745) 360 (25,38518,018) Administrative expenses (36,55434,321) 2,476 (16,798) (17,662651) (21,60249,294) 35 (736) (76,554) 1,712 (74,84249,259) Segment profit (loss) (79,97047,673) (14,39169,876) 26 1,705 (92,6302,317) 5,039 2,430 (87,591117,436) 6,203 (111,233) Other income 13,346 8,157 Interest revenue 569 Interest expenses - Financial cost (4,3557,454) Share of loss from investments in associate - Share of loss profit (loss) from investments in joint venture (1,1041,309) Profit (loss) before income tax expenses (79,135111,839) Income tax income (expense) 562 1,892 Profit (loss) for the period (78,573109,947) MARCH 31, 2021 In Thousand Baht For the three-month period periods 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 30March 31, 2020 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 476,074 210,086 975,366 11,253 1,672,779 338,215 134,387 476,612 6,349 955,563 - 1,672,779 955,563 Revenue from subsidiaries subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (33,15918,096) (14,6337,190) (4,8712,822) (2,4321,242) (55,09529,350) 729 369 (54,36628,981) Administrative expenses (71,39234,838) (31,50413,842) (32,16210,560) (1,352616) (136,41059,856) 2,686 974 (133,72458,882) Segment profit (loss) 1,592 (78,3783,950) (18,341) 12,453 3,725 (80,541) 10,025 (70,516) 12,427 2,020 12,089 4,986 17,075 Other income 20,922 7,576 Interest revenue 796 Interest expenses 227 Financial cost (10,0655,710) Share of loss from investments in associate - Share of loss profit (loss) from investments in joint venture (2,9591,855) Profit (loss) before income tax expenses (61,822) 17,313 Income tax income (expense) (5,5576,119) Profit (loss) for the period (67,379) In Thousand Baht For the six-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 300,885 227,443 914,122 6,138 1,448,588 - 1,448,588 Revenue from subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (28,984) (21,910) (4,639) (2,110) (57,643) 736 (56,907) Administrative expenses (70,441) (53,247) (23,683) (794) (148,165) 2,334 (145,831) Segment profit (loss) (26,631) (123,020) 18,596 948 (130,107) 7,525 (122,582) Other income 17,889 Interest revenue 288 Interest expenses (16,217) Share of profit from investments in joint venture 2,122 Profit (loss) before income tax expenses (118,500) Income tax income (expense) (3,494) Profit (loss) for the period (121,994) 11,194 Transfer prices between business segments are as set out in Note 54.

SEGMENT INFORMATION. The Company and its subsidiaries Group are organised into business units based on its products and services. During the current periods, the Company and its subsidiaries Group have not changed the organisation of their reportable segments. The following tables present revenue and profit information regarding the Company and its subsidiariesGroups’ operating segments in the consolidated financial statements for the three-month and six- nine-month periods ended June September 30, 2020 2021 and 20192020, respectively. In Thousand Baht For the three-month period ended June September 30, 2020 2021 Pipeline system Engineeringsystem Engineering system 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 - 717,216 320,209 4,707 463,676 18,787 807,379 (2,627) 804,752 Revenue from subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (15,06313,298) 44 (4,707) (7,443225) (2,04918,186) - (1,190) (25,745) 360 (25,38518,186) Administrative expenses (36,55429,442) 21 (17,263) (17,6622,838) (21,60249,522) 1,710 (736) (76,554) 1,712 (74,84247,812) Segment profit (loss) 1,404 444 13,315 (79,97056) (14,391) 26 1,705 (92,630) 5,039 (87,591) 15,107 3,713 18,820 Other income 13,346 4,800 Interest revenue 569 Interest expenses 123 Financial cost (4,3559,521) Share of loss from investments in associate - Share of loss profit (loss) from investments in joint venture Venture (1,104364) 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) 13,858 Income tax income (expense) (4564,598) Profit (loss) for the period (73,747) 9,260 In Thousand Baht Baht‌‌ For the sixthree-month period ended June September 30, 2020 Pipeline system Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 476,074 210,086 975,366 11,253 1,672,779 82,352 30,908 479,530 6,313 599,103 - 1,672,779 599,103 Revenue from subsidiaries - - - - - - - Revenue from associate - - - - - - - Depreciation (33,15912,331) (14,6334,999) (4,8712,400) (2,4321,170) (55,09520,900) 729 148 (54,36620,752) Administrative expenses (71,39225,558) (31,50410,336) (32,16217,271) (1,352648) (136,41053,813) 2,686 1,839 (133,72451,974) Segment profit (loss) (78,378114,043) (18,34110,785) 12,453 3,725 (80,541302,919) 10,025 (70,5161,166) (428,913) 5,626 (423,287) Other income 20,922 15,577 Interest revenue 796 Interest expenses 51 Financial cost (10,0657,468) Share of loss from investments in associate - Share of loss profit (loss) from investments in joint venture (2,959) 615 Profit (loss) before income tax expenses (61,822414,512) Income tax income (expense) (5,557) 32,000 Profit (loss) for the period (67,379382,512) In Thousand Baht For the sixnine-month period ended June September 30, 2019 2021 Pipeline system Engineeringsystem Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 300,885 227,443 914,122 6,138 1,448,588 - 1,448,588 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 (28,98438,730) 892 (13,802) (21,9103,247) (4,63954,887) 749 (2,110) (57,643) 736 (56,90754,138) Administrative expenses (70,44192,802) 2,133 (54,401) (53,2474,184) (23,683149,254) 1,657 (794) (148,165) 2,334 (145,831147,597) Segment profit (loss) (26,63127,489) (123,02069,508) 18,596 948 24,244 3,342 (130,10769,411) 7,525 13,599 (122,58255,812) Other income 17,889 30,555 Interest revenue 288 Interest expenses 155 Financial cost (16,21725,765) Share of profit (loss) from investments in joint venture 2,122 (914) Profit (loss) before income tax expenses (118,50051,781) Income tax income (expense) (3,4949,187) Profit (loss) for the period (121,99460,968) 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 54.

SEGMENT INFORMATION. The Company and its subsidiaries are organised into business units based on its products and services. During the current periodsperiod, the Company and its subsidiaries have not changed the organisation of their reportable segments. The following tables present revenue and profit information regarding the Company and its subsidiaries’ operating segments in the consolidated financial statements for the three-month and six- nine- month periods ended June September 30, 2020 2019 and 20192018, respectively. In Thousand Baht For the three-month period periods ended June 30, 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 September 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 476,074 210,086 975,366 11,253 1,672,779 275,128 65,747 613,852 3,390 958,117 - 1,672,779 958,117 Revenue from subsidiaries subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (33,15921,434) (14,6333,753) (4,8712,276) (2,4321,114) (55,09528,577) 729 314 (54,36628,263) Administrative expenses (71,39240,863) (31,5043,406) (32,16214,401) (1,352425) (136,41059,095) 2,686 124 (133,72458,971) Segment profit (loss) (78,37824,396) (18,341) 12,453 3,725 (80,541) 10,025 (70,516) 8,661 20,571 601 5,437 2,304 7,741 Other income 20,922 19,345 Interest revenue 796 2 Interest expenses (10,0658,571) Share of loss from investments in associate - Share of loss from investments in joint venture - Share of profit from investments in associate (2,95995) Profit (loss) Loss before income tax expenses (61,822) 18,422 Income tax income expenses (expense7,115) (5,557) Profit (loss) for Loss the period (67,379) 11,307 In Thousand Baht For the sixthree-month period periods ended June September 30, 2019 2018 Pipeline system Engineeringsystem Engineering system Civil work Sales and other services Total Segments Adjustments and eliminations Consolidated Revenue from external customers 300,885 227,443 914,122 6,138 1,448,588 261,922 105,118 277,096 1,718 645,854 - 1,448,588 645,854 Revenue from subsidiaries subsidiary - - - - - - - Revenue from associate - - - - - - - Depreciation (28,98417,489) (21,9107,270) (4,6392,642) (2,1101,066) (57,64328,467) 736 375 (56,90728,092) Administrative expenses (70,44143,503) (53,24717,923) (23,6838,266) (794405) (148,16570,097) 2,334 960 (145,83169,137) 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) (26,63151,027) (123,020114,359) 18,596 948 39,167 1,549 (130,107124,670) 7,525 9,829 (122,582114,841) Other income 17,889 37,234 Interest revenue 288 290 Interest expenses (16,21724,788) Share of loss from investments in joint venture - Share of profit from investments in joint venture 2,122 Profit (loss) associate 2,027 Loss before income tax expenses (118,500100,078) Income tax income expenses (expense10,609) 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) (3,49418,125) Profit (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 (121,994) 5,250 Transfer prices between business segments are as set out in Note 54.