Since there’s been so much interest, recollection and speculation upon the question of the Pelsall boiler explosion and its cause, I thought we could feature here the newspaper report of the inquiry into the explosion. The article transcribed below is taken from the Birmingham Daily Post of December 31st, 1887.
The report in question has been wonderfully transcribed by top blog reader and contributor Andy Dennis, who’s also contributed the following notes:
I’ll look into this a bit more, but, as you can imagine, Alphonso Ferriday was not hard to find in the censuses! In 1881 he was at Wombridge (a district of Wellington, Salop), colliery engineer-driver. 1891, after the explosion, at Sedgley, rope splicer. 1901 at Aston Manor, colliery engineer out of work. 1911 at Lozells, colliery engine wright, with a son Bertram born Pelsall about 1888 – born 24 Jan 1888, so poor Mrs Ferriday was heavily pregnant when the explosion occurred. The coroner’s verdict will be interesting!
I’d like to find out more about the deceased, but they are not so straightforward.
As ever, I remain indebted to Andy, who works so hard to provide so much great information here on the Brownhills Blog. I really don’t know what I’d do without all the wonderful readers out there.
The final article in the series will be featured in due course.
THE PELSALL BOILER EXPLOSION.
Yesterday, Mr E.B. Thorneycroft, deputy coroner, resumed an enquiry at the Swan Inn, Pelsall, touching the deaths of Thomas Elwell, William Lever, and Thomas Ledbury, who were killed by the explosion of a boiler at the No. 9 plant of the Pelsall Coal and Iron Company (Limited), on the 14th inst. The company was represented by Mr. L. W. Lewis, solicitor; Mr. J. H. Bullock, general manager; Mr J. Hough, colliery manager; Mr. J. Binns, chief engineer; and Mr. J. Davies, C.E. There were also present Mr. W. B. Scott, Government inspector of mines; Mr. E. B. Marten, C.E., Mr. J. F. Will, C.E., for the Staffordshire Boiler and Engineer Insurance Company (Limited); Mr. S. H. Whitehouse, miner’s secretary; and Police-superintendent Barratt. — The witnesses assembled at the previous sitting were recalled, and their evidence was read over to them, and in some instances corrected or supplemented. John Smith added to his previous evidence that Elwell, his co-engineer, had cleaned out and examined the boiler on the Sunday three weeks before the explosion, and witness cleaned it out and examined it three weeks before that. He saw no signs of leakage or corrosion. — Alphonso Ferriday, colliery engineer, said he was in the boiler three weeks before the explosion, but did not examine it with a hammer. — In answer to the Coroner, her said he still considered the boiler was a good one, and quite sufficient for the purposes to which it was put, except where corrosion had taken place. — John Binns, chief engineer, who was cautioned that his evidence might be used against him, said all the machines, engines, and boilers belonging to the company were under his supervision. Elwell and Smith, in addition to working the engine, were required to clean and examine the boilers alternately every three weeks. So far as he knew, the boiler that exploded was a perfectly good one. Since the explosion he had seen the corroded plates, and did not think it possible for Elwell and Smith to have discovered the defects there, because the defective part rested upon the brickwork. He did not think that there would be anything to indicate to Elwell or Smith that a removal of the brickwork was desirable. He did not consider that a boiler like the one in question could be examined properly without the seating being removed. It had not been removed during the six or seven years since he had been there. The cause of the explosion, in his opinion, was a combination of pressure of steam and the weakness of the plate since discovered. He believed that the pressure must have been 60lb. per square inch, and Elwell would be responsible for that. Witness said that there was more corrision in one part than the others. By Mr. Scott: He did not think that arose from leakage, but from ground damp. He considered that the boiler had been properly examined. He had not told Ferriday that it was his duty to examine each boiler internally every time it was empty, because Ferriday knew what his duties were. Ferriday did not do his duty in simply getting into the boiler and out again on the third Sunday before the explosion. The boiler should have been examined internally as well as externally as far as the brickwork was concerned. — By Mr. Lewis: There was never any delay or hesitancy on the part of the company in doing whatever was necessary. — Alphonso Ferriday, recalled, said he considered that Elwell must have put too much pressure on suddenly, and that that caused the explosion. He had previously warned Elwell to put on the steam quietly, in consequence of new joints having been put in the pipes down the pit.
Edward Bindon Marten, C.E., presented a report of an examination which he had made of the exploded boiler, by the coroner’s orders. He also presented a model and sketch. The boiler was a Cornish one, but not quite of the usual form; 18ft. 6in. long by 6ft.4in. diameter; made of 3/4in. plates, arranged diagonally, with ends cambered about eight inches. The internal tube was 2ft. 10in. diameter in the front, tapering in the middle, and 2ft. 3in. at the back. The fire was in the larger front part, and the heated gases divided at the back, returned by the side places, and rejoined under the bottom at the front end, passing by the central bottom flue to the chimney. After describing the valves, &c., and stating that the pressure was likely to be 40lb. at the time of the explosion, he said the first rupture appeared to have taken place on the left hand side of the shell, towards the front end, and the rent then extended each way for about 6ft., and then ran along the line of rivets, allowing the shell to be torn off nearly in one piece. The piece fell flatted out to the right rear. The front end and a short piece of the bottom of the shell were thrown to the front and fell in two pieces. The back ends of the tube were thrown a little to the left rear, the tube remaining intact. One small piece, forming part of a patch near the first rupture, was thrown a long way to the right rear. The cause of the explosion was very plain to see, as the plates where they had rested on the left side wall were wasted by external corrosion until little if any thickness was left in some places. The corroded part was about 6ft. long and 1ft. wide, the rest of the plates being little altered. The side flues were too small to enter, but the bottom flue could be traversed, and although the corrosion could not be seen from either flue it would have been detected by the removal of the bricks touching the boiler, as the weight was taken by the brackets and not the flue walls. The corrosion was not to be seen from the inside of the boiler, but the thin parts would most likely have yielded to a moderate blow of a hammer if it had been struck fairly at them. The corrosion must have been caused from dampness of the brickwork, either from the drainage of a small tramroad on the side, or from the leaking of the patches near it. The patches pointed to probable strain in the shell of the boiler, most likely from the cambered ends being more rigid and unyielding than the usual flat ends, which allowed for expansion of the tubes when heated. It was very probable that the firing up for high pressure work expanded the tube and caused the strain on the weakened part, which led to rupture at the particular time. The explosion confirmed the opinion that however good the general appearance of the boiler its real condition could only be ascertained by examination of every part at short intervals, and without sacrifice of efficiency flues could often be better arranged to facilitate inspection. In the present instance a central wall making only two large flues would be allowed, all the flues to be traversed, and the contact of brickwork reduced to a narrow-topped wall, easily removed, as the boiler was otherwise supported. The cause of the explosion, as he had already said, was local corrosion under the brickwork on the left side of the front, as shown on the sketch and the model. The rent was in the line of the brickwork, and the corrosion did not extend into the flue near the bottom or the side. The plates of the boiler were generally good, and were defective only at the part resting on the brickwork. The wasting from corrosion must have been going on some time – more than a year. The thinness of the plates might have been discovered, but not very surely, by the use of a hammer inside, but it was difficult to get at the corroded part to give it a fair blow, or it might have been discovered easily by the removal of a small part of the brickwork. He did not think the bottom of the flue could have been traversed without signs of the dampness having been discovered. The corroded part was about 6ft. long by 1ft. wide, and unless that particular part had been struck on the inside there would have been no indication of the weakness. The plates on the other side of the boiler were nearly as good as when they were put in, pointing to the conclusion that there must have been extensive leakage on the side which exploded. The nominal bursting pressure was 60lb., but the real bursting pressure was six times greater, without taking into account the diagonal plates. He thought there was nothing to complain of here in the matter of pressure, the valves, &c., being all in good order. — By Mr. Lewis: There might have been sufficient leakage to cause the corrosion without its showing inside. If the examinations were made in dry weather there might have been no dampness in the flues.
William Slack, mechanical engineer, said he had known the boiler about thirteen years. It was first used in the ironworks, but was laid down at the colliery about seven years ago under his (witness’s) supervision, he being then chief engineer to the company. It was then put in thorough repair. — The enquiry was then further adjourned for a week.